Workshop report
| 
25 Feb 2022
Workshop report |
| 25 Feb 2022
| 25 Feb 2022
Sensitivity of the West Antarctic Ice Sheet to +2 °C (SWAIS 2C)
Molly O. Patterson
CORRESPONDING AUTHOR
Department of Geological Sciences and Environmental Studies, Binghamton University, Binghamton, NY, USA
Richard H. Levy
GNS Science, Lower Hutt, New Zealand
Antarctic Research Centre, Victoria University of Wellington,
Wellington, New Zealand
Denise K. Kulhanek
Department of Geological Sciences and Environmental Studies, Binghamton University, Binghamton, NY, USA
Institute of Geosciences, Christian-Albrecht University of Kiel, Kiel, Germany
Tina van de Flierdt
Department of Earth Science and Engineering, Imperial College London, London, UK
Huw Horgan
Antarctic Research Centre, Victoria University of Wellington,
Wellington, New Zealand
Gavin B. Dunbar
Antarctic Research Centre, Victoria University of Wellington,
Wellington, New Zealand
Timothy R. Naish
Antarctic Research Centre, Victoria University of Wellington,
Wellington, New Zealand
Jeanine Ash
Department of Earth, Environmental and Planetary Sciences, Rice
University, Houston, TX, USA
Alex Pyne
Antarctic Research Centre, Victoria University of Wellington,
Wellington, New Zealand
Darcy Mandeno
Antarctic Research Centre, Victoria University of Wellington,
Wellington, New Zealand
Paul Winberry
Department of Geological Sciences, Central Washington University,
Ellensburg, WA, USA
David M. Harwood
Department of Earth & Atmospheric Sciences, University of
Nebraska-Lincoln, Lincoln, NE, USA
Fabio Florindo
Instituto Nazionale di Geofisica e Vulcanologia, Rome, Italy
Francisco J. Jimenez-Espejo
Instituto Andaluz de Ciencias de la Tierra, Spanish Research Council (CSIC), Armilla, Spain
Andreas Läufer
Federal Institute for Geosciences and Natural Resources (BGR),
Hannover, Germany
Kyu-Cheul Yoo
Division of Glacial Environment Research, Korea Polar Research
Institute, Incheon, Republic of Korea
Osamu Seki
National Institute of Polar Research, 10-3 Midori-cho, Tachikawa,
Tokyo, Japan
Institute of Low Temperature Science, Hokkaidō University,
Sapporo, Japan
Paolo Stocchi
Department of Coastal Systems, NIOZ Royal Netherlands Institute for Sea Research, Den Burg, the Netherlands
Johann P. Klages
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine
Research, Bremerhaven, Germany
Jae Il Lee
Division of Glacial Environment Research, Korea Polar Research
Institute, Incheon, Republic of Korea
Florence Colleoni
Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Trieste, Italy
Yusuke Suganuma
National Institute of Polar Research, 10-3 Midori-cho, Tachikawa,
Tokyo, Japan
Edward Gasson
School of Geographical Sciences, University of Bristol, Bristol, UK
Christian Ohneiser
Department of Geology, University of Otago, Dunedin, New Zealand
José-Abel Flores
Department of Geology, University of Salamanca, Salamanca, Spain
David Try
GNS Science, Lower Hutt, New Zealand
Rachel Kirkman
GNS Science, Lower Hutt, New Zealand
Daleen Koch
GNS Science, Lower Hutt, New Zealand
A full list of authors appears at the end of the paper.
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A machine learning technique similar to the one used to enhance everyday photographs is applied to the problem of getting a better picture of Antarctica's bed – the part which is hidden beneath the ice. By taking hints from what satellites can observe at the ice surface, the novel method learns to generate a rougher bed topography that complements existing approaches, with a result that is able to be used by scientists running fine-scale ice sheet models relevant to predicting future sea levels.
Erin L. McClymont, Heather L. Ford, Sze Ling Ho, Julia C. Tindall, Alan M. Haywood, Montserrat Alonso-Garcia, Ian Bailey, Melissa A. Berke, Kate Littler, Molly O. Patterson, Benjamin Petrick, Francien Peterse, A. Christina Ravelo, Bjørg Risebrobakken, Stijn De Schepper, George E. A. Swann, Kaustubh Thirumalai, Jessica E. Tierney, Carolien van der Weijst, Sarah White, Ayako Abe-Ouchi, Michiel L. J. Baatsen, Esther C. Brady, Wing-Le Chan, Deepak Chandan, Ran Feng, Chuncheng Guo, Anna S. von der Heydt, Stephen Hunter, Xiangyi Li, Gerrit Lohmann, Kerim H. Nisancioglu, Bette L. Otto-Bliesner, W. Richard Peltier, Christian Stepanek, and Zhongshi Zhang
Clim. Past, 16, 1599–1615, https://doi.org/10.5194/cp-16-1599-2020, https://doi.org/10.5194/cp-16-1599-2020, 2020
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We examine the sea-surface temperature response to an interval of climate ~ 3.2 million years ago, when CO2 concentrations were similar to today and the near future. Our geological data and climate models show that global mean sea-surface temperatures were 2.3 to 3.2 ºC warmer than pre-industrial climate, that the mid-latitudes and high latitudes warmed more than the tropics, and that the warming was particularly enhanced in the North Atlantic Ocean.
Maren Bender, Thomas Mann, Paolo Stocchi, Dominik Kneer, Tilo Schöne, Julia Illigner, Jamaluddin Jompa, and Alessio Rovere
Clim. Past, 16, 1187–1205, https://doi.org/10.5194/cp-16-1187-2020, https://doi.org/10.5194/cp-16-1187-2020, 2020
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This paper presents 24 new sea-level index points in the Spermonde Archipelago, Indonesia, and the reconstruction of the local Holocene relative sea-level history in combination with glacial isostasic adjustment models. We further show the importance of surveying the height of living coral microatolls as modern analogs to the fossil ones. Other interesting aspects are the potential subsidence of one of the densely populated islands, and we present eight samples that are dated to the Common Era.
Zhongshi Zhang, Qing Yan, Ran Zhang, Florence Colleoni, Gilles Ramstein, Gaowen Dai, Martin Jakobsson, Matt O'Regan, Stefan Liess, Denis-Didier Rousseau, Naiqing Wu, Elizabeth J. Farmer, Camille Contoux, Chuncheng Guo, Ning Tan, and Zhengtang Guo
Clim. Past Discuss., https://doi.org/10.5194/cp-2020-38, https://doi.org/10.5194/cp-2020-38, 2020
Manuscript not accepted for further review
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Whether an ice sheet once grew over Northeast Siberia-Beringia has been debated for decades. By comparing climate modelling with paleoclimate and glacial records from around the North Pacific, this study shows that the Laurentide-Eurasia-only ice sheet configuration fails in explaining these records, while a scenario involving the ice sheet over Northeast Siberia-Beringia succeeds. It highlights the complexity in glacial climates and urges new investigations across Northeast Siberia-Beringia.
Ambarish Pokhrel, Kimitaka Kawamura, Bhagawati Kunwar, Kaori Ono, Akane Tsushima, Osamu Seki, Sumio Matoba, and Takayuki Shiraiwa
Atmos. Chem. Phys., 20, 597–612, https://doi.org/10.5194/acp-20-597-2020, https://doi.org/10.5194/acp-20-597-2020, 2020
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A 180 m long (ca. 274 year) ice core was drilled in the saddle of the Aurora Peak in Alaska (63.52° N, 146.54° W; elevation: 2,825 m). The ice core samples were derived with O-bis-(trimethylsilyl)trifluoroacetamide with 1 % trimethylsilyl chloride and pyridine followed by gas-chromatography–mass-spectrometry analyses. Levoglucosan, dehydroabietic acid and vanillic acid are reported for the first time from the alpine glacier to better understand historical biomass burning.
Andrés S. Rigual Hernández, Thomas W. Trull, Scott D. Nodder, José A. Flores, Helen Bostock, Fátima Abrantes, Ruth S. Eriksen, Francisco J. Sierro, Diana M. Davies, Anne-Marie Ballegeer, Miguel A. Fuertes, and Lisa C. Northcote
Biogeosciences, 17, 245–263, https://doi.org/10.5194/bg-17-245-2020, https://doi.org/10.5194/bg-17-245-2020, 2020
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Coccolithophores account for a major fraction of the carbonate produced in the world's oceans. However, their contribution in the subantarctic Southern Ocean remains undocumented. We quantitatively partition calcium carbonate fluxes amongst coccolithophore species in the Australian–New Zealand sector of the Southern Ocean. We provide new insights into the importance of species other than Emiliania huxleyi in the carbon cycle and assess their possible response to projected environmental change.
Jon Camuera, Gonzalo Jiménez-Moreno, María J. Ramos-Román, Antonio García-Alix, Francisco Jiménez-Espejo, Jaime L. Toney, R. Scott Anderson, and Cole Webster
Clim. Past Discuss., https://doi.org/10.5194/cp-2019-130, https://doi.org/10.5194/cp-2019-130, 2019
Preprint withdrawn
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This study presents a unique high-resolution terrestrial paleoclimate record between 20,000 and 11,000 cal yr BP from the Padul wetland (S Spain) that allowed the identification of 3 main phases within the cold and arid Heinrich Stadial 1 (HS1) and, for the first time, a further subdivision of HS1 in 7 centennial-scale sub-phases.
Mariem Saavedra-Pellitero, Karl-Heinz Baumann, Miguel Ángel Fuertes, Hartmut Schulz, Yann Marcon, Nele Manon Vollmar, José-Abel Flores, and Frank Lamy
Biogeosciences, 16, 3679–3702, https://doi.org/10.5194/bg-16-3679-2019, https://doi.org/10.5194/bg-16-3679-2019, 2019
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Open ocean phytoplankton include coccolithophore algae, a key element in carbon cycle regulation with important feedbacks to the climate system. We document latitudinal variability in both coccolithophore assemblage and the mass variation in one particular species, Emiliania huxleyi, for a transect across the Drake Passage (in the Southern Ocean). Coccolithophore abundance, diversity and maximum depth habitat decrease southwards, coinciding with changes in the predominant E. huxleyi morphotypes.
Gloria M. Martin-Garcia, Francisco J. Sierro, José A. Flores, and Fátima Abrantes
Clim. Past, 14, 1639–1651, https://doi.org/10.5194/cp-14-1639-2018, https://doi.org/10.5194/cp-14-1639-2018, 2018
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This work documents major oceanographic changes that occurred in the N. Atlantic from 812 to 530 ka and were related to the mid-Pleistocene transition. Since ~ 650 ka, glacials were more prolonged and intense than before. Larger ice sheets may have worked as a positive feedback mechanism to prolong the duration of glacials. We explore the connection between the change in the N. Atlantic oceanography and the enhanced ice-sheet growth, which contributed to the change of cyclicity in climate.
Robert McKay, Neville Exon, Dietmar Müller, Karsten Gohl, Michael Gurnis, Amelia Shevenell, Stuart Henrys, Fumio Inagaki, Dhananjai Pandey, Jessica Whiteside, Tina van de Flierdt, Tim Naish, Verena Heuer, Yuki Morono, Millard Coffin, Marguerite Godard, Laura Wallace, Shuichi Kodaira, Peter Bijl, Julien Collot, Gerald Dickens, Brandon Dugan, Ann G. Dunlea, Ron Hackney, Minoru Ikehara, Martin Jutzeler, Lisa McNeill, Sushant Naik, Taryn Noble, Bradley Opdyke, Ingo Pecher, Lowell Stott, Gabriele Uenzelmann-Neben, Yatheesh Vadakkeykath, and Ulrich G. Wortmann
Sci. Dril., 24, 61–70, https://doi.org/10.5194/sd-24-61-2018, https://doi.org/10.5194/sd-24-61-2018, 2018
Richard H. Levy, Gavin B. Dunbar, Marcus J. Vandergoes, Jamie D. Howarth, Tony Kingan, Alex R. Pyne, Grant Brotherston, Michael Clarke, Bob Dagg, Matthew Hill, Evan Kenton, Steve Little, Darcy Mandeno, Chris Moy, Philip Muldoon, Patrick Doyle, Conrad Raines, Peter Rutland, Delia Strong, Marianna Terezow, Leise Cochrane, Remo Cossu, Sean Fitzsimons, Fabio Florindo, Alexander L. Forrest, Andrew R. Gorman, Darrell S. Kaufman, Min Kyung Lee, Xun Li, Pontus Lurcock, Nicholas McKay, Faye Nelson, Jennifer Purdie, Heidi A. Roop, S. Geoffrey Schladow, Abha Sood, Phaedra Upton, Sharon L. Walker, and Gary S. Wilson
Sci. Dril., 24, 41–50, https://doi.org/10.5194/sd-24-41-2018, https://doi.org/10.5194/sd-24-41-2018, 2018
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A new annually resolvable sedimentary record of southern hemisphere climate has been recovered from Lake Ohau, South Island, New Zealand. The Lake Ohau Climate History (LOCH) Project acquired cores from two sites that preserve an 80 m thick sequence of laminated mud that accumulated since the lake formed ~ 17 000 years ago. Cores were recovered using a purpose-built barge and drilling system designed to recover soft sediment from relatively thick sedimentary sequences at water depths up to 100 m.
Joo-Eun Yoon, Kyu-Cheul Yoo, Alison M. Macdonald, Ho-Il Yoon, Ki-Tae Park, Eun Jin Yang, Hyun-Cheol Kim, Jae Il Lee, Min Kyung Lee, Jinyoung Jung, Jisoo Park, Jiyoung Lee, Soyeon Kim, Seong-Su Kim, Kitae Kim, and Il-Nam Kim
Biogeosciences, 15, 5847–5889, https://doi.org/10.5194/bg-15-5847-2018, https://doi.org/10.5194/bg-15-5847-2018, 2018
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Our paper provides an intensive overview of the artificial ocean iron fertilization (aOIF) experiments conducted over the last 25 years to test Martin’s hypothesis, discusses aOIF-related important unanswered open questions, suggests considerations for the design of future aOIF experiments to maximize their effectiveness, and introduces design guidelines for a future Korean Iron Fertilization Experiment in the Southern Ocean.
Ariadna Salabarnada, Carlota Escutia, Ursula Röhl, C. Hans Nelson, Robert McKay, Francisco J. Jiménez-Espejo, Peter K. Bijl, Julian D. Hartman, Stephanie L. Strother, Ulrich Salzmann, Dimitris Evangelinos, Adrián López-Quirós, José Abel Flores, Francesca Sangiorgi, Minoru Ikehara, and Henk Brinkhuis
Clim. Past, 14, 991–1014, https://doi.org/10.5194/cp-14-991-2018, https://doi.org/10.5194/cp-14-991-2018, 2018
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Here we reconstruct ice sheet and paleoceanographic configurations in the East Antarctic Wilkes Land margin based on a multi-proxy study conducted in late Oligocene (26–25 Ma) sediments from IODP Site U1356. The new obliquity-forced glacial–interglacial sedimentary model shows that, under the high CO2 values of the late Oligocene, ice sheets had mostly retreated to their terrestrial margins and the ocean was very dynamic with shifting positions of the polar fronts and associated water masses.
Andrés S. Rigual Hernández, José A. Flores, Francisco J. Sierro, Miguel A. Fuertes, Lluïsa Cros, and Thomas W. Trull
Biogeosciences, 15, 1843–1862, https://doi.org/10.5194/bg-15-1843-2018, https://doi.org/10.5194/bg-15-1843-2018, 2018
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Long-term and annual field observations on key organisms are a critical basis for predicting changes in Southern Ocean ecosystems. Coccolithophores are the most abundant calcium-carbonate-producing phytoplankton and play an important role in Southern Ocean biogeochemical cycles. In this study we document the composition, degree of calcification and annual cycle of coccolithophore communities in one of the largest unexplored regions of the world oceans: the Antarctic zone.
Saúl González-Lemos, José Guitián, Miguel-Ángel Fuertes, José-Abel Flores, and Heather M. Stoll
Biogeosciences, 15, 1079–1091, https://doi.org/10.5194/bg-15-1079-2018, https://doi.org/10.5194/bg-15-1079-2018, 2018
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Changes in atmospheric carbon dioxide affect ocean chemistry and the ability of marine organisms to manufacture shells from calcium carbonate. We describe a technique to obtain more reproducible measurements of the thickness of calcium carbonate shells made by microscopic marine algae called coccolithophores, which will allow researchers to compare how the shell thickness responds to variations in ocean chemistry in the past and present.
Nancy A. N. Bertler, Howard Conway, Dorthe Dahl-Jensen, Daniel B. Emanuelsson, Mai Winstrup, Paul T. Vallelonga, James E. Lee, Ed J. Brook, Jeffrey P. Severinghaus, Taylor J. Fudge, Elizabeth D. Keller, W. Troy Baisden, Richard C. A. Hindmarsh, Peter D. Neff, Thomas Blunier, Ross Edwards, Paul A. Mayewski, Sepp Kipfstuhl, Christo Buizert, Silvia Canessa, Ruzica Dadic, Helle A. Kjær, Andrei Kurbatov, Dongqi Zhang, Edwin D. Waddington, Giovanni Baccolo, Thomas Beers, Hannah J. Brightley, Lionel Carter, David Clemens-Sewall, Viorela G. Ciobanu, Barbara Delmonte, Lukas Eling, Aja Ellis, Shruthi Ganesh, Nicholas R. Golledge, Skylar Haines, Michael Handley, Robert L. Hawley, Chad M. Hogan, Katelyn M. Johnson, Elena Korotkikh, Daniel P. Lowry, Darcy Mandeno, Robert M. McKay, James A. Menking, Timothy R. Naish, Caroline Noerling, Agathe Ollive, Anaïs Orsi, Bernadette C. Proemse, Alexander R. Pyne, Rebecca L. Pyne, James Renwick, Reed P. Scherer, Stefanie Semper, Marius Simonsen, Sharon B. Sneed, Eric J. Steig, Andrea Tuohy, Abhijith Ulayottil Venugopal, Fernando Valero-Delgado, Janani Venkatesh, Feitang Wang, Shimeng Wang, Dominic A. Winski, V. Holly L. Winton, Arran Whiteford, Cunde Xiao, Jiao Yang, and Xin Zhang
Clim. Past, 14, 193–214, https://doi.org/10.5194/cp-14-193-2018, https://doi.org/10.5194/cp-14-193-2018, 2018
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Temperature and snow accumulation records from the annually dated Roosevelt Island Climate Evolution (RICE) ice core show that for the past 2 700 years, the eastern Ross Sea warmed, while the western Ross Sea showed no trend and West Antarctica cooled. From the 17th century onwards, this dipole relationship changed. Now all three regions show concurrent warming, with snow accumulation declining in West Antarctica and the eastern Ross Sea.
Blanca Ausín, Diana Zúñiga, Jose A. Flores, Catarina Cavaleiro, María Froján, Nicolás Villacieros-Robineau, Fernando Alonso-Pérez, Belén Arbones, Celia Santos, Francisco de la Granda, Carmen G. Castro, Fátima Abrantes, Timothy I. Eglinton, and Emilia Salgueiro
Biogeosciences, 15, 245–262, https://doi.org/10.5194/bg-15-245-2018, https://doi.org/10.5194/bg-15-245-2018, 2018
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A systematic investigation of the coccolithophore ecology was performed for the first time in the NW Iberian Margin to broaden our knowledge on the use of fossil coccoliths in marine sediment records to infer environmental conditions in the past. Coccolithophores proved to be significant primary producers and their abundance and distribution was favoured by warmer and nutrient–depleted waters during the upwelling regime, seasonally controlled offshore and influenced by coastal processes onshore.
Nicholas R. Golledge, Zoë A. Thomas, Richard H. Levy, Edward G. W. Gasson, Timothy R. Naish, Robert M. McKay, Douglas E. Kowalewski, and Christopher J. Fogwill
Clim. Past, 13, 959–975, https://doi.org/10.5194/cp-13-959-2017, https://doi.org/10.5194/cp-13-959-2017, 2017
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We investigated how the Antarctic climate and ice sheets evolved during a period of warmer-than-present temperatures 4 million years ago, during a time when the carbon dioxide concentration in the atmosphere was very similar to today's level. Using computer models to first simulate the climate, and then how the ice sheets responded, we found that Antarctica most likely lost around 8.5 m sea-level equivalent ice volume as both East and West Antarctic ice sheets retreated.
Johan Liakka, Marcus Löfverström, and Florence Colleoni
Clim. Past, 12, 1225–1241, https://doi.org/10.5194/cp-12-1225-2016, https://doi.org/10.5194/cp-12-1225-2016, 2016
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The present study explains why Scandinavia was ice-covered 20 000 years ago, while Siberia was mostly ice free. The authors show that the ice-sheet extent in Eurasia was to a large extent controlled by atmospheric circulation changes due to the ice sheet in North America. As the North American ice sheet becomes larger, it induces a cooling in Europe and a warming in Siberia: this climatic pattern forces the Eurasian ice sheet to migrate westward until it is centered over Scandinavia.
B. Giaccio, E. Regattieri, G. Zanchetta, B. Wagner, P. Galli, G. Mannella, E. Niespolo, E. Peronace, P. R. Renne, S. Nomade, G. P. Cavinato, P. Messina, A. Sposato, C. Boschi, F. Florindo, F. Marra, and L. Sadori
Sci. Dril., 20, 13–19, https://doi.org/10.5194/sd-20-13-2015, https://doi.org/10.5194/sd-20-13-2015, 2015
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As a pilot study for a possible depth-drilling project, an 82m long sedimentary succession was retrieved from the Fucino Basin, central Apennines, which hosts ca. 900m of lacustrine sediments. The acquired paleoclimatic record, from the retrieved core, spans the last 180ka and reveals noticeable variations related to the last two glacial-interglacial cycles. In light of these results, the Fucino sediments are likely to provide one of the longest continuous record for the last 2Ma.
B. Ausín, I. Hernández-Almeida, J.-A. Flores, F.-J. Sierro, M. Grosjean, G. Francés, and B. Alonso
Clim. Past, 11, 1635–1651, https://doi.org/10.5194/cp-11-1635-2015, https://doi.org/10.5194/cp-11-1635-2015, 2015
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Coccolithophore distribution in 88 surface sediment samples in the Atlantic Ocean and western Mediterranean was mainly influenced by salinity at 10m depth. A quantitative coccolithophore-based transfer function was developed and applied to a fossil sediment core to estimate sea surface salinity (SSS). The quality of this function and the reliability of the SSS reconstruction were assessed by statistical analyses and discussed. Several centennial SSS changes are identified for the last 15.5 ka.
O. Rama-Corredor, B. Martrat, J. O. Grimalt, G. E. López-Otalvaro, J. A. Flores, and F. Sierro
Clim. Past, 11, 1297–1311, https://doi.org/10.5194/cp-11-1297-2015, https://doi.org/10.5194/cp-11-1297-2015, 2015
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The alkenone sea surface temperatures in the Guiana Basin show a rapid transmission of the climate variability from arctic to tropical latitudes during the last two interglacials (MIS1 and MIS5e) and warm long interstadials (MIS5d-a). In contrast, the abrupt variability of the glacial interval does follow the North Atlantic climate but is also shaped by precessional changes. This arctic to tropical decoupling occurs when the Atlantic meridional overturning circulation is substantially reduced.
C. J. Hollis, B. R. Hines, K. Littler, V. Villasante-Marcos, D. K. Kulhanek, C. P. Strong, J. C. Zachos, S. M. Eggins, L. Northcote, and A. Phillips
Clim. Past, 11, 1009–1025, https://doi.org/10.5194/cp-11-1009-2015, https://doi.org/10.5194/cp-11-1009-2015, 2015
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Re-examination of a Deep Sea Drilling Project sediment core (DSDP Site 277) from the western Campbell Plateau has identified the initial phase of the Paleocene-Eocene Thermal Maximum (PETM) within nannofossil chalk, the first record of the PETM in an oceanic setting in the southern Pacific Ocean (paleolatitude of ~65°S). Geochemical proxies indicate that intermediate and surface waters warmed by ~6° at the onset of the PETM prior to the full development of the negative δ13C excursion.
I. Hernández-Almeida, F.-J. Sierro, I. Cacho, and J.-A. Flores
Clim. Past, 11, 687–696, https://doi.org/10.5194/cp-11-687-2015, https://doi.org/10.5194/cp-11-687-2015, 2015
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This manuscript presents new Mg/Ca and previously published δ18O measurements of Neogloboquadrina pachyderma sinistral for MIS 31-19, from a sediment core from the subpolar North Atlantic. The mechanism proposed here involves northward subsurface transport of warm and salty subtropical waters during periods of weaker AMOC, leading to ice-sheet instability and IRD discharge. This is the first time that these rapid climate oscillations are described for the early Pleistocene.
C. Lavoie, E. W. Domack, E. C. Pettit, T. A. Scambos, R. D. Larter, H.-W. Schenke, K. C. Yoo, J. Gutt, J. Wellner, M. Canals, J. B. Anderson, and D. Amblas
The Cryosphere, 9, 613–629, https://doi.org/10.5194/tc-9-613-2015, https://doi.org/10.5194/tc-9-613-2015, 2015
B. de Boer, P. Stocchi, and R. S. W. van de Wal
Geosci. Model Dev., 7, 2141–2156, https://doi.org/10.5194/gmd-7-2141-2014, https://doi.org/10.5194/gmd-7-2141-2014, 2014
F. Colleoni, S. Masina, A. Cherchi, A. Navarra, C. Ritz, V. Peyaud, and B. Otto-Bliesner
Clim. Past, 10, 269–291, https://doi.org/10.5194/cp-10-269-2014, https://doi.org/10.5194/cp-10-269-2014, 2014
Related subject area
Location/Setting: Continental | Subject: Geology | Geoprocesses: Global climate change
Paleogene Earth perturbations in the US Atlantic Coastal Plain (PEP-US): coring transects of hyperthermals to understand past carbon injections and ecosystem responses
Drilling into a deep buried valley (ICDP DOVE): a 252 m long sediment succession from a glacial overdeepening in northwestern Switzerland
Workshop report: PlioWest – drilling Pliocene lakes in western North America
Deep-time Arctic climate archives: high-resolution coring of Svalbard's sedimentary record – SVALCLIME, a workshop report
Drilling Overdeepened Alpine Valleys (ICDP-DOVE): quantifying the age, extent, and environmental impact of Alpine glaciations
From glacial erosion to basin overfill: a 240 m-thick overdeepening–fill sequence in Bern, Switzerland
Scientific drilling workshop on the Weihe Basin Drilling Project (WBDP): Cenozoic tectonic–monsoon interactions
Report on ICDP Deep Dust workshops: probing continental climate of the late Paleozoic icehouse–greenhouse transition and beyond
The Bouse Formation, a controversial Neogene archive of the evolving Colorado River: a scientific drilling workshop report (28 February–3 March 2019 – BlueWater Resort & Casino, Parker, AZ, USA)
Colorado Plateau Coring Project, Phase I (CPCP-I): a continuously cored, globally exportable chronology of Triassic continental environmental change from western North America
Report on ICDP workshop CONOSC (COring the NOrth Sea Cenozoic)
A key continental archive for the last 2 Ma of climatic history of the central Mediterranean region: A pilot drilling in the Fucino Basin, central Italy
Trans-Amazon Drilling Project (TADP): origins and evolution of the forests, climate, and hydrology of the South American tropics
Accelerating Neoproterozoic research through scientific drilling
A way forward to discover Antarctica's past
Marci M. Robinson, Kenneth G. Miller, Tali L. Babila, Timothy J. Bralower, James V. Browning, Marlow J. Cramwinckel, Monika Doubrawa, Gavin L. Foster, Megan K. Fung, Sean Kinney, Maria Makarova, Peter P. McLaughlin, Paul N. Pearson, Ursula Röhl, Morgan F. Schaller, Jean M. Self-Trail, Appy Sluijs, Thomas Westerhold, James D. Wright, and James C. Zachos
Sci. Dril., 33, 47–65, https://doi.org/10.5194/sd-33-47-2024, https://doi.org/10.5194/sd-33-47-2024, 2024
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The Paleocene–Eocene Thermal Maximum (PETM) is the closest geological analog to modern anthropogenic CO2 emissions, but its causes and the responses remain enigmatic. Coastal plain sediments can resolve this uncertainty, but their discontinuous nature requires numerous sites to constrain events. Workshop participants identified 10 drill sites that target the PETM and other interesting intervals. Our post-drilling research will provide valuable insights into Earth system responses.
Sebastian Schaller, Marius W. Buechi, Bennet Schuster, and Flavio S. Anselmetti
Sci. Dril., 32, 27–42, https://doi.org/10.5194/sd-32-27-2023, https://doi.org/10.5194/sd-32-27-2023, 2023
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In the frame of the DOVE (Drilling Overdeepened Alpine Valleys) project and with the support of the International Continental Scientific Drilling Program (ICDP), we drilled and recovered a 252 m long sediment core from the Basadingen Through. The Basadingen Trough, once eroded by the Rhine glacier during several ice ages, reaches over 300 m under the modern landscape. The sedimentary filling represents a precious scientific archive for understanding and reconstructing past glaciations.
Alison J. Smith, Emi Ito, Natalie Burls, Leon Clarke, Timme Donders, Robert Hatfield, Stephen Kuehn, Andreas Koutsodendris, Tim Lowenstein, David McGee, Peter Molnar, Alexander Prokopenko, Katie Snell, Blas Valero Garcés, Josef Werne, Christian Zeeden, and the PlioWest Working Consortium
Sci. Dril., 32, 61–72, https://doi.org/10.5194/sd-32-61-2023, https://doi.org/10.5194/sd-32-61-2023, 2023
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Western North American contains accessible and under-recognized paleolake records that hold the keys to understanding the drivers of wetter conditions in Pliocene Epoch subtropical drylands worldwide. In a 2021 ICDP workshop, we chose five paleolake basins to study that span 7° of latitude in a unique array able to capture a detailed record of hydroclimate during the Early Pliocene warm period and subsequent Pleistocene cooling. We propose new drill cores for three of these basins.
Kim Senger, Denise Kulhanek, Morgan T. Jones, Aleksandra Smyrak-Sikora, Sverre Planke, Valentin Zuchuat, William J. Foster, Sten-Andreas Grundvåg, Henning Lorenz, Micha Ruhl, Kasia K. Sliwinska, Madeleine L. Vickers, and Weimu Xu
Sci. Dril., 32, 113–135, https://doi.org/10.5194/sd-32-113-2023, https://doi.org/10.5194/sd-32-113-2023, 2023
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Geologists can decipher the past climates and thus better understand how future climate change may affect the Earth's complex systems. In this paper, we report on a workshop held in Longyearbyen, Svalbard, to better understand how rocks in Svalbard (an Arctic archipelago) can be used to quantify major climatic shifts recorded in the past.
Flavio S. Anselmetti, Milos Bavec, Christian Crouzet, Markus Fiebig, Gerald Gabriel, Frank Preusser, Cesare Ravazzi, and DOVE scientific team
Sci. Dril., 31, 51–70, https://doi.org/10.5194/sd-31-51-2022, https://doi.org/10.5194/sd-31-51-2022, 2022
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Previous glaciations eroded below the ice deep valleys in the Alpine foreland, which, with their sedimentary fillings, witness the timing and extent of these glacial advance–retreat cycles. Drilling such sedimentary sequences will thus provide well-needed evidence in order to reconstruct the (a)synchronicity of past ice advances in a trans-Alpine perspective. Eventually these data will document how the Alpine foreland was shaped and how the paleoclimate patterns varied along and across the Alps.
Michael A. Schwenk, Patrick Schläfli, Dimitri Bandou, Natacha Gribenski, Guilhem A. Douillet, and Fritz Schlunegger
Sci. Dril., 30, 17–42, https://doi.org/10.5194/sd-30-17-2022, https://doi.org/10.5194/sd-30-17-2022, 2022
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A scientific drilling was conducted into a bedrock trough (overdeepening) in Bern-Bümpliz (Switzerland) in an effort to advance the knowledge of the Quaternary prior to 150 000 years ago. We encountered a 208.5 m-thick succession of loose sediments (gravel, sand and mud) in the retrieved core and identified two major sedimentary sequences (A: lower, B: upper). The sedimentary suite records two glacial advances and the subsequent filling of a lake sometime between 300 000 and 200 000 years ago.
Zhisheng An, Peizhen Zhang, Hendrik Vogel, Yougui Song, John Dodson, Thomas Wiersberg, Xijie Feng, Huayu Lu, Li Ai, and Youbin Sun
Sci. Dril., 28, 63–73, https://doi.org/10.5194/sd-28-63-2020, https://doi.org/10.5194/sd-28-63-2020, 2020
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Earth has experienced remarkable climate–environmental changes in the last 65 million years. The Weihe Basin with its 6000–8000 m infill of a continuous sedimentary sequence gives a unique continental archive for the study of the Cenozoic environment and exploration of deep biospheres. This workshop report concludes key objectives of the two-phase Weihe Basin Drilling Project and the global significance of reconstructing Cenozoic climate evolution and tectonic–monsoon interaction in East Asia.
Gerilyn S. Soreghan, Laurent Beccaletto, Kathleen C. Benison, Sylvie Bourquin, Georg Feulner, Natsuko Hamamura, Michael Hamilton, Nicholas G. Heavens, Linda Hinnov, Adam Huttenlocker, Cindy Looy, Lily S. Pfeifer, Stephane Pochat, Mehrdad Sardar Abadi, James Zambito, and the Deep Dust workshop participants
Sci. Dril., 28, 93–112, https://doi.org/10.5194/sd-28-93-2020, https://doi.org/10.5194/sd-28-93-2020, 2020
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The events of the Permian — the orogenies, biospheric turnovers, icehouse and greenhouse antitheses, and Mars-analog lithofacies — boggle the imagination and present us with great opportunities to explore Earth system behavior. Here we outline results of workshops to propose continuous coring of continental Permian sections in western (Anadarko Basin) and eastern (Paris Basin) equatorial Pangaea to retrieve continental records spanning 50 Myr of Earth's history.
Andrew Cohen, Colleen Cassidy, Ryan Crow, Jordon Bright, Laura Crossey, Rebecca Dorsey, Brian Gootee, Kyle House, Keith Howard, Karl Karlstrom, and Philip Pearthree
Sci. Dril., 26, 59–67, https://doi.org/10.5194/sd-26-59-2019, https://doi.org/10.5194/sd-26-59-2019, 2019
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This paper summarizes a workshop held in Parker, AZ, USA, to discuss planned scientific drilling in the Miocene(?) or early Pliocene Bouse Formation, a controversial deposit (of lacustrine, marine, or some hybrid origin) found in the lower Colorado River valley. The drilling project is intended to address this controversy as well as shed light on Pliocene climates of southwestern North America during an important period of past climate change.
Paul E. Olsen, John W. Geissman, Dennis V. Kent, George E. Gehrels, Roland Mundil, Randall B. Irmis, Christopher Lepre, Cornelia Rasmussen, Dominique Giesler, William G. Parker, Natalia Zakharova, Wolfram M. Kürschner, Charlotte Miller, Viktoria Baranyi, Morgan F. Schaller, Jessica H. Whiteside, Douglas Schnurrenberger, Anders Noren, Kristina Brady Shannon, Ryan O'Grady, Matthew W. Colbert, Jessie Maisano, David Edey, Sean T. Kinney, Roberto Molina-Garza, Gerhard H. Bachman, Jingeng Sha, and the CPCD team
Sci. Dril., 24, 15–40, https://doi.org/10.5194/sd-24-15-2018, https://doi.org/10.5194/sd-24-15-2018, 2018
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The Colorado Plateau Coring Project-1 recovered ~ 850 m of core in three holes at two sites in the Triassic fluvial strata of Petrified Forest National Park, AZ, USA. The cores have abundant zircon, U-Pb dateable layers (210–241 Ma) that along with magnetic polarity stratigraphy, validate the eastern US-based Newark-Hartford astrochronology and timescale, while also providing temporal and environmental context for the vast geological archives of the Triassic of western North America.
Wim Westerhoff, Timme Donders, and Stefan Luthi
Sci. Dril., 21, 47–51, https://doi.org/10.5194/sd-21-47-2016, https://doi.org/10.5194/sd-21-47-2016, 2016
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The CONOSC (COring the NOrth Sea Cenozoic) project brings scientists together that aim at scientific drilling of the north-western European marginal seas where in the last 65 million years the influence of sea and land was recorded continuously in the sediments. The subsiding area is ideally suited for detailed study of the relations between changing climate, biodiversity, and changing land masses. The report discusses the ICDP workshop outcome and overall project aims.
B. Giaccio, E. Regattieri, G. Zanchetta, B. Wagner, P. Galli, G. Mannella, E. Niespolo, E. Peronace, P. R. Renne, S. Nomade, G. P. Cavinato, P. Messina, A. Sposato, C. Boschi, F. Florindo, F. Marra, and L. Sadori
Sci. Dril., 20, 13–19, https://doi.org/10.5194/sd-20-13-2015, https://doi.org/10.5194/sd-20-13-2015, 2015
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As a pilot study for a possible depth-drilling project, an 82m long sedimentary succession was retrieved from the Fucino Basin, central Apennines, which hosts ca. 900m of lacustrine sediments. The acquired paleoclimatic record, from the retrieved core, spans the last 180ka and reveals noticeable variations related to the last two glacial-interglacial cycles. In light of these results, the Fucino sediments are likely to provide one of the longest continuous record for the last 2Ma.
P. A. Baker, S. C. Fritz, C. G. Silva, C. A. Rigsby, M. L. Absy, R. P. Almeida, M. Caputo, C. M. Chiessi, F. W. Cruz, C. W. Dick, S. J. Feakins, J. Figueiredo, K. H. Freeman, C. Hoorn, C. Jaramillo, A. K. Kern, E. M. Latrubesse, M. P. Ledru, A. Marzoli, A. Myrbo, A. Noren, W. E. Piller, M. I. F. Ramos, C. C. Ribas, R. Trnadade, A. J. West, I. Wahnfried, and D. A. Willard
Sci. Dril., 20, 41–49, https://doi.org/10.5194/sd-20-41-2015, https://doi.org/10.5194/sd-20-41-2015, 2015
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We report on a planned Trans-Amazon Drilling Project (TADP) that will continuously sample Late Cretaceous to modern sediment in a transect along the equatorial Amazon of Brazil, from the Andean foreland to the Atlantic Ocean. The TADP will document the evolution of the Neotropical forest and will link biotic diversification to changes in the physical environment, including climate, tectonism, and landscape. We will also sample the ca. 200Ma basaltic sills that underlie much of the Amazon.
D. J. Condon, P. Boggiani, D. Fike, G. P. Halverson, S. Kasemann, A. H. Knoll, F. A. Macdonald, A. R. Prave, and M. Zhu
Sci. Dril., 19, 17–25, https://doi.org/10.5194/sd-19-17-2015, https://doi.org/10.5194/sd-19-17-2015, 2015
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This workshop report outlines the background, topics discussed and major conclusions/future directions arising form an ICDP- and ECORD-sponsored workshop convened to discuss the utility of scientific drilling for accelerating Neoproterozoic research.
J. S. Wellner
Sci. Dril., 18, 11–11, https://doi.org/10.5194/sd-18-11-2014, https://doi.org/10.5194/sd-18-11-2014, 2014
Cited articles
Ash, J. L., Franca, A., Biddle, J., Giovannelli, D., Singh, S. M., Martinez-Mendez, G., Müller, J., Mollenhauer, G., and Hefter, J.: Microbial Sediment Community Changes from the Last Glacial Maximum to Modern beneath the Ross Sea, in: AGU Fall Meeting Abstracts, 5 October 2020, online, vol. 2019, B53L-2573, 2019.
Bamber, J. L. and Aspinall, W. P.: An expert judgement assessment of future
sea level rise from the ice sheets, Nat. Clim. Change, 3, 424–427, https://doi.org/10.1038/nclimate1778, 2013.
Bamber, J. L., Westaway, R. M., Marzeion, B., and Wouters, B.: The land ice
contribution to sea level during the satellite era, Environ. Res. Lett.,
13, 063008, https://doi.org/10.1088/1748-9326/aac2f0, 2018.
Bassis, J., Berg, B., Crawford, A., and Benn, D.: Transition to marine ice
cliff instability controlled by ice thickness gradients and velocity,
Science, 372, 1342–1344, 2021.
Bindschadler, R. A., Roberts, E. P., and Iken, A.: Age of Crary Ice Rise,
Antarctica, determined from temperature-depth profiles, Ann. Glaciol., 14,
13–16, 1990.
Carr, S. A., Vogel, S. W., Dunbar, R. B., Brandes, J., Spear, J. R., Levy,
R., Naish, T. R., Powell, R. D., Wakeham, S. G., and Mandernack, K. W.:
Bacterial abundance and composition in marine sediments beneath the Ross Ice
Shelf, Antarctica, Geobiology, 11, 377–395, 2013.
Catania, G., Hulbe, C., Conway, H., Scambos, T. A., and Raymond, C. F.:
Variability in the mass flux of the Ross ice streams, West Antarctica, over
the last millennium, J. Glaciol., 58, 741–752, 2012.
Christner, B. C., Priscu, J. C., Achberger, A. M., Barbante, C., Carter, S.
P., Christianson, K., Michaud, A. B., Mikucki, J. A., Mitchell, A. C., and
Skidmore, M. L.: A microbial ecosystem beneath the West Antarctic ice sheet,
Nature, 512, 310–313, 2014.
Conway, H., Catania, G., Raymond, C. F., Gades, A. M., Scambos, T. A., and
Engelhardt, H.: Switch of flow direction in an Antarctic ice stream, Nature,
419, 465–467, 2002.
Crawford, A. J., Benn, D. I., Todd, J., Åström, J. A., Bassis, J.
N., and Zwinger, T.: Marine ice-cliff instability modeling shows mixed-mode
ice-cliff failure and yields calving rate parameterization, Nat.
Commun., 12, 2701, https://doi.org/10.1038/s41467-021-23070-7, 2021.
DeConto, R. M. and Pollard, D.: Contribution of Antarctica to past and
future sea-level rise, Nature, 531, 591–597, https://doi.org/10.1038/nature17145, 2016.
DeConto, R. M., Pollard, D., Alley, R. B., Velicogna, I., Gasson, E., Gomez,
N., Sadai, S., Condron, A., Gilford, D. M., Ashe, E. L., Kopp, R. E., Li,
D., and Dutton, A.: The Paris Climate Agreement and future sea-level rise
from Antarctica, Nature, 593, 83–89, https://doi.org/10.1038/s41586-021-03427-0, 2021.
Edwards, T. L., Brandon, M. A., Durand, G., Edwards, N. R., Golledge, N. R.,
Holden, P. B., Nias, I. J., Payne, A. J., Ritz, C., and Wernecke, A.:
Revisiting Antarctic ice loss due to marine ice-cliff instability, Nature,
566, 58–64, 2019.
Edwards, T. L., Nowicki, S., Marzeion, B., Hock, R., Goelzer, H., Seroussi,
H., Jourdain, N. C., Slater, D. A., Turner, F. E., Smith, C. J., McKenna, C.
M., Simon, E., Abe-Ouchi, A., Gregory, J. M., Larour, E., Lipscomb, W. H.,
Payne, A. J., Shepherd, A., Agosta, C., Alexander, P., Albrecht, T.,
Anderson, B., Asay-Davis, X., Aschwanden, A., Barthel, A., Bliss, A., Calov,
R., Chambers, C., Champollion, N., Choi, Y., Cullather, R., Cuzzone, J.,
Dumas, C., Felikson, D., Fettweis, X., Fujita, K., Galton-Fenzi, B. K.,
Gladstone, R., Golledge, N. R., Greve, R., Hattermann, T., Hoffman, M. J.,
Humbert, A., Huss, M., Huybrechts, P., Immerzeel, W., Kleiner, T.,
Kraaijenbrink, P., Le clec'h, S., Lee, V., Leguy, G. R., Little, C. M.,
Lowry, D. P., Malles, J.-H., Martin, D. F., Maussion, F., Morlighem, M.,
O'Neill, J. F., Nias, I., Pattyn, F., Pelle, T., Price, S. F., Quiquet, A.,
Radić, V., Reese, R., Rounce, D. R., Rückamp, M., Sakai, A., Shafer,
C., Schlegel, N.-J., Shannon, S., Smith, R. S., Straneo, F., Sun, S.,
Tarasov, L., Trusel, L. D., Van Breedam, J., van de Wal, R., van den Broeke,
M., Winkelmann, R., Zekollari, H., Zhao, C., Zhang, T., and Zwinger, T.:
Projected land ice contributions to twenty-first-century sea level rise,
Nature, 593, 74–82, https://doi.org/10.1038/s41586-021-03302-y, 2021.
Falconer, T., Pyne, A., Wilson, D., Levy, R., Nielsen, S., and Petrushak,
S.: Operations overview for the ANDRILL Southern McMurdo Sound Project,
Antarctica, Terra Antarctica, 15, 41–48, 2008.
Fielding, C. R.: Stratigraphic architecture of the Cenozoic succession in
the McMurdo Sound region, Antarctica: An archive of polar
palaeoenvironmental change in a failed rift setting, Sedimentology, 65,
1–61, https://doi.org/10.1111/sed.12413, 2018.
Fisher, A. T., Mankoff, K. D., Tulaczyk, S. M., Tyler, S. W., Foley, N., and
Team, and the W. S.: High geothermal heat flux measured below the West
Antarctic Ice Sheet, Sci. Adv., 1, e1500093,
https://doi.org/10.1126/sciadv.1500093, 2015.
Fretwell, P., Pritchard, H. D., Vaughan, D. G., Bamber, J. L., Barrand, N. E., Bell, R., Bianchi, C., Bingham, R. G., Blankenship, D. D., Casassa, G., Catania, G., Callens, D., Conway, H., Cook, A. J., Corr, H. F. J., Damaske, D., Damm, V., Ferraccioli, F., Forsberg, R., Fujita, S., Gim, Y., Gogineni, P., Griggs, J. A., Hindmarsh, R. C. A., Holmlund, P., Holt, J. W., Jacobel, R. W., Jenkins, A., Jokat, W., Jordan, T., King, E. C., Kohler, J., Krabill, W., Riger-Kusk, M., Langley, K. A., Leitchenkov, G., Leuschen, C., Luyendyk, B. P., Matsuoka, K., Mouginot, J., Nitsche, F. O., Nogi, Y., Nost, O. A., Popov, S. V., Rignot, E., Rippin, D. M., Rivera, A., Roberts, J., Ross, N., Siegert, M. J., Smith, A. M., Steinhage, D., Studinger, M., Sun, B., Tinto, B. K., Welch, B. C., Wilson, D., Young, D. A., Xiangbin, C., and Zirizzotti, A.: Bedmap2: improved ice bed, surface and thickness datasets for Antarctica, The Cryosphere, 7, 375–393, https://doi.org/10.5194/tc-7-375-2013, 2013.
Gasson, E., DeConto, R. M., Pollard, D., and Levy, R. H.: Dynamic Antarctic
ice sheet during the early to mid-Miocene, P. Natl. Acad. Sci. USA, 113, 3459–3464, 2016.
Golledge, N. R. and Lowry, D. P.: Is the marine ice cliff hypothesis
collapsing?, Science, 372, 1266–1267, 2021.
Golledge, N. R., Kowalewski, D. E., Naish, T. R., Levy, R. H., Fogwill, C.
J., and Gasson, E. G.: The multi-millennial Antarctic commitment to future
sea-level rise, Nature, 526, 421–425, https://doi.org/10.1038/nature15706, 2015.
Gomez, N., Pollard, D., and Holland, D.: Sea-level feedback lowers
projections of future Antarctic Ice-Sheet mass loss, Nat. Commun., 6,
1–8, 2015.
Harwood, D., Florindo, F., Talarico, F., and Levy, R. H.: Studies from the ANDRILL, Southern McMurdo Sound Project, Antarctica, Initial Science Report on AND-2A, in: Terra Antartica, vol. 15, 1–235, ISSN 1122-8628, http://192.167.120.37/Editoria/TAP/volume15.html (last access: 17 February 2022), 2008–2009.
Hawkings, J. R., Skidmore, M. L., Wadham, J. L., Priscu, J. C., Morton, P.
L., Hatton, J. E., Gardner, C. B., Kohler, T. J., Stibal, M., and Bagshaw,
E. A.: Enhanced trace element mobilization by Earth's ice sheets, P.
Natl. Acad. Sci. USA, 117, 31648–31659, 2020.
Hay, C., Mitrovica, J. X., Gomez, N., Creveling, J. R., Austermann, J., and
Kopp, R. E.: The sea-level fingerprints of ice-sheet collapse during
interglacial periods, Quaternary Sci. Rev., 87, 60–69, 2014.
Hayes, D. E., Frakes, L. A., Barrett, P. J., Burns, D. A., Chen, P.-H., Ford, A. B., Kaneps, A. G., Kemp, E. M., McCollum, D. M., Piper, D. J. W., Wall, R. E., and Webb, P. N.: Sites 270, 271, 272, Initial Reports of the Deep Sea Drilling Project 28, Washington, US Government Printing Office, 211–334, https://doi.org/10.2973/dsdp.proc.28.108.1975, 1975a.
Hayes, D. E., Frakes, L. A., Barrett, P. J., Burns, D. A., Chen, P.-H., Ford, A. B., Kaneps, A. G., Kemp, E. M., McCollum, D. M., Piper, D. J. W., Wall, R. E., and Webb, P. N.: Site 273, Initial Reports of the Deep Sea Drilling
Project 28, 335–368, https://doi.org/10.2973/dsdp.proc.28.109.1975, 1975b.
Hillebrand, T. R., Conway, H., Koutnik, M., Martín, C., Paden, J., and
Winberry, J. P.: Radio-echo sounding and waveform modeling reveal abundant
marine ice in former rifts and basal crevasses within Crary Ice Rise,
Antarctica, J. Glaciol., 67, 1–12, 2021.
Horgan, H. J., Alley, R. B., Christianson, K., Jacobel, R. W.,
Anandakrishnan, S., Muto, A., Beem, L. H., and Siegfried, M. R.: Estuaries
beneath ice sheets, Geology, 41, 1159–1162, 2013.
Horgan, H. J., Hulbe, C., Alley, R. B., Anandakrishnan, S., Goodsell, B.,
Taylor-Offord, S., and Vaughan, M. J.: Poststagnation Retreat of Kamb Ice
Stream's Grounding Zone, Geophys. Res. Lett., 44, 9815–9822, 2017.
Hulbe, C. and Fahnestock, M.: Century-scale discharge stagnation and
reactivation of the Ross ice streams, West Antarctica, J. Geophys. Res.-Earth Surf., 112, F03S27, https://doi.org/10.1029/2006JF000603, 2007.
IMBIE team: Mass balance of the Antarctic Ice Sheet from 1992–2017, Nature,
558, 219–222, 2018.
IPCC: Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Stocker, T. F., Qin, D., Plattner, G.-K., Tignor, M., Allen, S. K., Boschung, J., Nauels, A., Xia, Y., Bex, V., and Midgley, P. M., Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 1535 pp., ISBN 978-1-107-05799-1, 2013.
IPCC: Summary for Policymakers, in: Global Warming of 1.5 ∘C. An IPCC Special Report on the impacts of global warming of 1.5 ∘C above pre-industrial levels and related global greenhouse gas emission
pathways, in the context of strengthening the global response to the threat
of climate change, sustainable development, and efforts to eradicate poverty, edited by: Masson-Delmotte, V., Zhai, P., Pörtner, H.-O., Roberts, D., Skea, J., Shukla, P. R., Pirani, A., Moufouma-Okia, W., Péan, C., Pidcock, R., Connors, S., Matthews, J. B. R., Chen, Y., Zhou, X., Gomis, M. I., Lonnoy, E., Maycock, T., Tignor, M., and Waterfield, T., World Meteorological Organization, Geneva, Switzerland, 32 pp., https://www.ipcc.ch/site/assets/uploads/sites/2/2019/05/SR15_SPM_version_report_LR.pdf (last access: 17 February 2022), 2018.
IPCC: Summary for Policymakers, in: Climate Change 2021: The Physical
Science Basis. Contribution of Working Group I to the Sixth Assessment
Report of the Intergovernmental Panel on Climate Change, edited by: Masson-Delmotte, V., Zhai, P., Pirani, A., Connors, S. L., Péan, C., Berger, S., Caud, N., Chen, Y., Goldfarb, L., Gomis, M. I., Huang, M., Leitzell, K., Lonnoy, E., Matthews, J. B. R., Maycock, T. K., Waterfield, T., Yelekçi, O., Yu, R., and Zhou, B., Cambridge University Press, in press, 2021.
IRIS consortium: Collaborative Research: Grounding Line Dynamics: Crary Ice Rise Revisited [data set], 19-016, 9J 2015, http://ds.iris.edu/mda/19-016/, last access: 18 February 2022.
Joughin, I. and Tulaczyk, S.: Positive mass balance of the Ross ice streams,
West Antarctica, Science, 295, 476–480, 2002.
Joughin, I., Tulaczyk, S., Bindschadler, R., and Price, S. F.: Changes in west Antarctic ice stream velocities; observation and analysis, J. Geophys. Res.-Solid, 107, 2289, https://doi.org/10.1029/2001JB001029, 2002.
Joughin, I., Alley, R. B., and Holland, D. M.: Ice-sheet response to oceanic
forcing, Science, 338, 1172–1176, 2012.
Kingslake, J., Scherer, R. P., Albrecht, T., Coenen, J., Powell, R. D.,
Reese, R., Stansell, N. D., Tulaczyk, S., Wearing, M. G., and Whitehouse, P.
L.: Extensive retreat and re-advance of the West Antarctic Ice Sheet during
the Holocene, Nature, 558, 430–434, 2018.
Kopp, R. E., Horton, R. M., Little, C. M., Mitrovica, J. X., Oppenheimer,
M., Rasmussen, D. J., Strauss, B. H., and Tebaldi, C.: Probabilistic 21st and
22nd century sea-level projections at a global network of tide-gauge sites,
Earths Future, 2, 383–406, 2014.
Kopp, R. E., DeConto, R. M., Bader, D. A., Hay, C. C., Horton, R. M., Kulp,
S., Oppenheimer, M., Pollard, D., and Strauss, B. H.: Evolving understanding
of Antarctic ice-sheet physics and ambiguity in probabilistic sea-level
projections, Earths Future, 5, 1217–1233, 2017.
Levy, R., Harwood, D., Florindo, F., Sangiorgi, F., Tripati, R., von
Eynatten, H., Gasson, E., Kuhn, G., Tripati, A., DeConto, R., Fielding, C.,
Field, B., Golledge, N., McKay, R., Naish, T., Olney, M., Pollard, D.,
Schouten, S., Talarico, F., Warny, S., Willmott, V., Acton, G., Panter, K.,
Paulsen, T., and Taviani, M.: Antarctic ice sheet sensitivity to atmospheric
CO2 variations in the early to mid-Miocene, P. Natl. Acad. Sci. USA,
113, 3453, https://doi.org/10.1073/pnas.1516030113, 2016.
Levy, R. H., Meyers, S. R., Naish, T. R., Golledge, N. R., McKay, R. M.,
Crampton, J. S., DeConto, R. M., De Santis, L., Florindo, F., Gasson, E. G.
W., Harwood, D. M., Luyendyk, B. P., Powell, R. D., Clowes, C., and
Kulhanek, D. K.: Antarctic ice-sheet sensitivity to obliquity forcing
enhanced through ocean connections, Nat. Geosci., 12, 132–137,
https://doi.org/10.1038/s41561-018-0284-4, 2019.
Luthra, T., Anandakrishnan, S., Winberry, J. P., Alley, R. B., and Holschuh,
N.: Basal characteristics of the main sticky spot on the ice plain of
Whillans Ice Stream, Antarctica, Earth Planet. Sci. Lett., 440, 12–19,
2016.
McKay, R., Naish, T., Carter, L., Riesselman, C., Dunbar, R., Sjunneskog,
C., Winter, D., Sangiorgi, F., Warren, C., and Pagani, M.: Antarctic and
Southern Ocean influences on Late Pliocene global cooling, P. Natl. Acad.
Sci. USA, 109, 6423–6428, 2012.
McKay, R. M., Barrett, P. J., Levy, R. S., Naish, T. R., Golledge, N. R.,
and Pyne, A.: Antarctic Cenozoic climate history from sedimentary records:
ANDRILL and beyond, Philos. T. Roy. Soc. A, 374, 1–17, https://doi.org/10.1098/rsta.2014.0301, 2016.
McKay, R. M., De Santis, L., Kulhanek, D. K., and Expedition 374 Scientists (Eds.): Ross Sea West Antarctic Ice Sheet History, International Ocean
Discovery Program, https://doi.org/10.14379/iodp.proc.374.2019, 2019.
Melles, M., Brigham-Grette, J., Minyuk, P. S., Nowaczyk, N. R., Wennrich,
V., DeConto, R. M., Anderson, P. M., Andreev, A. A., Coletti, A., and Cook,
T. L.: 2.8 million years of Arctic climate change from Lake El'gygytgyn, NE
Russia, Science, 337, 315–320, 2012.
Mitrovica, J. X., Gomez, N., and Clark, P. U.: The sea-level fingerprint of
West Antarctic collapse, Science, 323, 753–753, 2009.
Naish, T., Powell, R., Levy, R., Florindo, F., Harwood, D., Kuhn, G.,
Niessen, F., Talarico, F., and Wilson, G.: A record of Antarctic climate and
ice sheet history recovered, Eos Trans. Am. Geophys. Union, 88,
557–558, 2007.
Naish, T., Powell, R., Levy, R., Wilson, G., Scherer, R., Talarico, F., Krissek, L., Niessen, F., Pompilio, M., Wilson, T., Carter, L., DeConto, R., Huybers, P., McKay, R., Pollard, D., Ross, J., Winter, D., Barrett, P., Browne, G., Cody, R., Cowan, E., Crampton, J., Dunbar, G., Dunbar, N., Florindo, F., Gebhardt, C., Graham, I., Hannah, M., Hansaraj, D., Harwood, D., Helling, D., Henry, S., Hinnov, L., Kuhn, G., Kyle, P., Läufer, A., Mafioli, P., Magens, D., Mandernack, K., McIntosh, W., Millan, C., Morin, R., Ohneiser, C., Paulsen, T., Persico, D., Raine, I., Reed, J., Riesselman, C., Sagnotti, L., Schmitt, D., Sjunneskog, C., Strong, P., Taviani, M., Vogel, S., Wilch, T., and Williams, T.: Obliquity-paced Pliocene West Antarctic ice sheet oscillations, Nature, 458, 322–328, https://doi.org/10.1038/nature07867,
2009.
Nerem, R. S., Beckley, B. D., Fasullo, J. T., Hamlington, B. D., Masters,
D., and Mitchum, G. T.: Climate-change–driven accelerated sea-level rise
detected in the altimeter era, P. Natl. Acad. Sci. USA, 115, 2022–2025, https://doi.org/10.1073/pnas.1717312115, 2018.
Oppenheimer, M. and Alley, R. B.: How high will the seas rise?, Science,
354, 1375–1377, 2016.
Pollard, D. and DeConto, R. M.: Modelling West Antarctic ice sheet growth
and collapse through the past five million years, Nature, 458,
329–332, https://doi.org/10.1038/nature07809, 2009.
Pollard, D., DeConto, R. M., and Alley, R. B.: Potential Antarctic Ice Sheet
retreat driven by hydrofracturing and ice cliff failure, Earth Planet.
Sc. Lett., 412, 112–121, https://doi.org/10.1016/j.epsl.2014.12.035, 2015.
Price, S. F., Bindschadler, R. A., Hulbe, C. L., and Joughin, I. R.: Post-stagnation behavior in the upstream regions of Ice Stream C, West Antarctica, J. Glaciol., 47, 283–294, https://doi.org/10.3189/172756501781832232, 2001.
Priscu, J. C., Kalin, J., Winans, J., Campbell, T., Siegfried, M. R.,
Skidmore, M., Dore, J. E., Leventer, A., Harwood, D. M., Duling, D., Zook,
R., Burnett, J., Gibson, D., Krula, E., Mironov, A., McManis, J., Roberts,
G., Rosenheim, B., Christner, B. C., Kasic, K., Fricker, H., Lyons, W. B.,
Barker, J., Bowling, M., Collins, B., Davis, C., Gagnon, A., Gardner, C.,
Gustafson, C., Kim, O-S., Li, W., Michaud, Al., Patterson, M. O., Tranter,
M., Venturelli, R., Vick-Majors, T., Cooper, E., and the SALSA Science Team:
Scientific access into Mercer Subglacial Lake: scientific objectives,
drilling operations and initial observations, Ann. Glaciol., 62, 1–13, 2021.
Retzlaff, R. and Bentley, C. R.: Timing of stagnation of Ice Stream C, West
Antarctica, from short-pulse radar studies of buried surface crevasses, J.
Glaciol., 39, 553–561, https://doi.org/10.3189/S0022143000016440,
1993.
Retzlaff, R., Lord, N., and Bentley, C. R.: Airborne-radar studies: Ice
streams A, B and C, West Antarctica, J. Glaciol., 39, 495–506, 1993.
Scherer, R. P.: Quaternary and Tertiary microfossils from beneath Ice Stream
B: Evidence for a dynamic West Antarctic Ice Sheet history, Glob. Planet.
Change, 4, 395–412, https://doi.org/10.1016/0921-8181(91)90005-H, 1991.
Scherer, R. P., Harwood, D. M., Ishman, S. E., and Webb, P. N.:
Micropaleontological analysis of sediments from the Crary Ice Rise, Ross ice
Shelf, Antarctic JUS, 23, 34–36, 1988.
Shepherd, A., Ivins, E., Rignot, E., Smith, B., van den Broeke, M.,
Velicogna, I., Whitehouse, P., Briggs, K., Joughin, I., Krinner, G.,
Nowicki, S., Payne, T., Scambos, T., Schlegel, N., A, G., Agosta, C.,
Ahlstrøm, A., Babonis, G., Barletta, V., Blazquez, A., Bonin, J., Csatho,
B., Cullather, R., Felikson, D., Fettweis, X., Forsberg, R., Gallee, H.,
Gardner, A., Gilbert, L., Groh, A., Gunter, B., Hanna, E., Harig, C., Helm,
V., Horvath, A., Horwath, M., Khan, S., Kjeldsen, K. K., Konrad, H., Langen,
P., Lecavalier, B., Loomis, B., Luthcke, S., McMillan, M., Melini, D.,
Mernild, S., Mohajerani, Y., Moore, P., Mouginot, J., Moyano, G., Muir, A.,
Nagler, T., Nield, G., Nilsson, J., Noel, B., Otosaka, I., Pattle, M. E.,
Peltier, W. R., Pie, N., Rietbroek, R., Rott, H., Sandberg-Sørensen, L.,
Sasgen, I., Save, H., Scheuchl, B., Schrama, E., Schröder, L., Seo,
K.-W., Simonsen, S., Slater, T., Spada, G., Sutterley, T., Talpe, M.,
Tarasov, L., van de Berg, W. J., van der Wal, W., van Wessem, M.,
Vishwakarma, B. D., Wiese, D., and Wouters, B.: Mass balance of the
Antarctic Ice Sheet from 1992 to 2017, Nature, 558, 219–222, https://doi.org/10.1038/s41586-018-0179-y, 2018.
Tebaldi, C., Debeire, K., Eyring, V., Fischer, E., Fyfe, J., Friedlingstein, P., Knutti, R., Lowe, J., O'Neill, B., Sanderson, B., van Vuuren, D., Riahi, K., Meinshausen, M., Nicholls, Z., Tokarska, K. B., Hurtt, G., Kriegler, E., Lamarque, J.-F., Meehl, G., Moss, R., Bauer, S. E., Boucher, O., Brovkin, V., Byun, Y.-H., Dix, M., Gualdi, S., Guo, H., John, J. G., Kharin, S., Kim, Y., Koshiro, T., Ma, L., Olivié, D., Panickal, S., Qiao, F., Rong, X., Rosenbloom, N., Schupfner, M., Séférian, R., Sellar, A., Semmler, T., Shi, X., Song, Z., Steger, C., Stouffer, R., Swart, N., Tachiiri, K., Tang, Q., Tatebe, H., Voldoire, A., Volodin, E., Wyser, K., Xin, X., Yang, S., Yu, Y., and Ziehn, T.: Climate model projections from the Scenario Model Intercomparison Project (ScenarioMIP) of CMIP6, Earth Syst. Dynam., 12, 253–293, https://doi.org/10.5194/esd-12-253-2021, 2021.
Tyler, S. W., Holland, D. M., Zagorodnov, V., Stern, A. A., Sladek, C.,
Kobs, S., White, S., Suárez, F., and Bryenton, J.: Using distributed
temperature sensors to monitor an Antarctic ice shelf and sub-ice-shelf
cavity, J. Glaciol., 59, 583–591, https://doi.org/10.3189/2013JoG12J207,
2013.
UNFCCC: Adoption of the Paris Agreement, FCCC/CP/2015/10/Add.1, 1–32, Paris, https://www.un.org/en/development/desa/population/migration/generalassembly/docs/globalcompact/FCCC_CP_2015_10_Add.1.pdf (last access: 10 February 2022), 2015.
Velicogna, I., Sutterley, T. C., and van den Broeke, M. R.: Regional
acceleration in ice mass loss from Greenland and Antarctica using GRACE
time-variable gravity data, Geophys. Res. Lett., 41, 8130–8137, https://doi.org/10.1002/2014gl061052, 2014.
Venturelli, R. A., Siegfried, M. R., Roush, K. A., Li, W., Burnett, J.,
Zook, R., Fricker, H. A., Priscu, J. C., Leventer, A., and Rosenheim, B. E.:
Mid-Holocene Grounding Line Retreat and Readvance at Whillans Ice Stream,
West Antarctica, Geophys. Res. Lett., 47, e2020GL088476, https://doi.org/10.1029/2020GL088476, 2020.
Vick-Majors, T. J., Michaud, A. B., Skidmore, M. L., Turetta, C., Barbante,
C., Christner, B. C., Dore, J. E., Christianson, K., Mitchell, A. C., and
Achberger, A. M.: Biogeochemical connectivity between freshwater ecosystems
beneath the West Antarctic Ice Sheet and the sub-ice marine environment,
Glob. Biogeochem. Cy., 34, e2019GB006446, https://doi.org/10.1029/2019GB006446, 2020.
Whitehouse, P. L., Gomez, N., King, M. A., and Wiens, D. A.: Solid Earth
change and the evolution of the Antarctic Ice Sheet, Nat. Commun., 10,
1–14, https://doi.org/10.1038/s41467-018-08068-y, 2019.
Short summary
How much of the West Antarctic Ice Sheet will melt and how quickly it will happen when average global temperatures exceed 2 °C is currently unknown. Given the far-reaching and international consequences of Antarctica’s future contribution to global sea level rise, the SWAIS 2C Project was developed in order to better forecast the size and timing of future changes.
How much of the West Antarctic Ice Sheet will melt and how quickly it will happen when average...
