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Wilkes Basin

January 01, 1970

The Wilkes Basin is a large subglacial basin situated generally southward of George V Coast and westward of Prince Albert Mountains in East Antarctica. The feature is approximately 1400 km long and 400 km wide. The Wilkes Basin is considered to be the largest marine-based drainage basin in East Antarctica, and may be in a state of marine ice sheet instability, caused by warm water intrusion into the shelf cavities.[1]

History edit

It was discovered by the United States Victoria Land Traverse of 1959–1960.[2] It was named by the Advisory Committee on Antarctic Names (US-ACAN) (1961) for the proximity of the western portion of this feature to Wilkes Land, and for the explorations along George V Coast by the United States Exploring Expedition (1838–42) under Lieutenant Charles Wilkes, USN.

Deglaciation edit

A study reported in Nature Climate Change on May 5, 2014[3] says the marine ice trapped in the basin is at risk of melting over the next 200 years. If unstopped, the East Antarctica ice would then move out into the sea over the next 5,000 to 10,000 years and could raise sea levels worldwide by three to four metres over that span of time.[4] The Intergovernmental Panel on Climate Change (IPCC) reported (with low confidence) in its Sixth Assessment Report that under warming of 3°C to 5°C, the most extreme of three warming scenarios reported, substantial parts or all of Wilkes Subglacial Basin in East Antarctica could melt over several millennia.[5] In 2022, it was included in an extensive assessment of tipping points in the climate system published in the Science Magazine, where it was grouped alongside several other subglacial basins like the nearby Aurora Basin. It concluded that their collective tipping threshold lies around 3°C, with a range between 2°Cand 6°C. Their collapse would then take between 500 and 10,000 years (with a median of 2000 years). The associated change in ice-albedo feedback would be expected to raise the global temperature by an additional 0.05°C. [6][7]

See also edit

References edit

  1. ^ Ricarda Winkelmann; Anders Levermann; Andy Ridgwell; Ken Caldeira (11 September 2015). "Combustion of available fossil fuel resources sufficient to eliminate the Antarctic Ice Sheet". Science Advances. 1 (8): e1500589. Bibcode:2015SciA....1E0589W. doi:10.1126/sciadv.1500589. PMC 4643791. PMID 26601273.
  2. ^ Weihaupt, J., 1961,Geophysical Studies in Victoria Land, Antarctica,Report No. 1, Geophysical and Polar Research Center, University of Wisconsin Madison, 123 pages
  3. ^ A. Levermann; Mengel, M. (2014). "Ice plug prevents irreversible discharge from East Antarctica". Nature Climate Change. 4 (6): 451–455. Bibcode:2014NatCC...4..451M. doi:10.1038/nclimate2226. ISSN 1758-6798.
  4. ^ Heltzel, Paul (2014-05-05). "East Antarctica Melt Could Mean 10 Foot Sea-Level Rise". Seeker. Retrieved 2019-01-22.
  5. ^ Fox-Kemper, B.; Hewitt, H.T.; Xiao, C.; Aðalgeirsdóttir, G.; Drijfhout, S.S.; Edwards, T.L.; Golledge, N.R.; Hemer, M.; Kopp, R.E.; Krinner, G.; Mix, A. (2021). Masson-Delmotte, V.; Zhai, P.; Pirani, A.; Connors, S.L.; Péan, C.; Berger, S.; Caud, N.; Chen, Y.; Goldfarb, L. (eds.). "Ocean, Cryosphere and Sea Level Change" (PDF). Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change. 2021. Cambridge, UK and New York, NY, USA: Cambridge University Press: 1211–1362. doi:10.1017/9781009157896.011. ISBN 9781009157896.
  6. ^ Armstrong McKay, David; Abrams, Jesse; Winkelmann, Ricarda; Sakschewski, Boris; Loriani, Sina; Fetzer, Ingo; Cornell, Sarah; Rockström, Johan; Staal, Arie; Lenton, Timothy (9 September 2022). "Exceeding 1.5°C global warming could trigger multiple climate tipping points". Science. 377 (6611): eabn7950. doi:10.1126/science.abn7950. hdl:10871/131584. ISSN 0036-8075. PMID 36074831. S2CID 252161375.
  7. ^ Armstrong McKay, David (9 September 2022). "Exceeding 1.5°C global warming could trigger multiple climate tipping points – paper explainer". climatetippingpoints.info. Retrieved 2 October 2022.

  This article incorporates public domain material from . Geographic Names Information System. United States Geological Survey.   

75°0′S 145°0′E / 75.000°S 145.000°E / -75.000; 145.000


 

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January 01, 1970
wilkes, basin, large, subglacial, basin, situated, generally, southward, george, coast, westward, prince, albert, mountains, east, antarctica, feature, approximately, 1400, long, wide, considered, largest, marine, based, drainage, basin, east, antarctica, stat. The Wilkes Basin is a large subglacial basin situated generally southward of George V Coast and westward of Prince Albert Mountains in East Antarctica The feature is approximately 1400 km long and 400 km wide The Wilkes Basin is considered to be the largest marine based drainage basin in East Antarctica and may be in a state of marine ice sheet instability caused by warm water intrusion into the shelf cavities 1 Contents 1 History 2 Deglaciation 3 See also 4 ReferencesHistory editIt was discovered by the United States Victoria Land Traverse of 1959 1960 2 It was named by the Advisory Committee on Antarctic Names US ACAN 1961 for the proximity of the western portion of this feature to Wilkes Land and for the explorations along George V Coast by the United States Exploring Expedition 1838 42 under Lieutenant Charles Wilkes USN Deglaciation editA study reported in Nature Climate Change on May 5 2014 3 says the marine ice trapped in the basin is at risk of melting over the next 200 years If unstopped the East Antarctica ice would then move out into the sea over the next 5 000 to 10 000 years and could raise sea levels worldwide by three to four metres over that span of time 4 The Intergovernmental Panel on Climate Change IPCC reported with low confidence in its Sixth Assessment Report that under warming of 3 C to 5 C the most extreme of three warming scenarios reported substantial parts or all of Wilkes Subglacial Basin in East Antarctica could melt over several millennia 5 In 2022 it was included in an extensive assessment of tipping points in the climate system published in the Science Magazine where it was grouped alongside several other subglacial basins like the nearby Aurora Basin It concluded that their collective tipping threshold lies around 3 C with a range between 2 Cand 6 C Their collapse would then take between 500 and 10 000 years with a median of 2000 years The associated change in ice albedo feedback would be expected to raise the global temperature by an additional 0 05 C 6 7 See also editAmundsen Basin Resolution Subglacial HighlandsReferences edit Ricarda Winkelmann Anders Levermann Andy Ridgwell Ken Caldeira 11 September 2015 Combustion of available fossil fuel resources sufficient to eliminate the Antarctic Ice Sheet Science Advances 1 8 e1500589 Bibcode 2015SciA 1E0589W doi 10 1126 sciadv 1500589 PMC 4643791 PMID 26601273 Weihaupt J 1961 Geophysical Studies in Victoria Land Antarctica Report No 1 Geophysical and Polar Research Center University of Wisconsin Madison 123 pages A Levermann Mengel M 2014 Ice plug prevents irreversible discharge from East Antarctica Nature Climate Change 4 6 451 455 Bibcode 2014NatCC 4 451M doi 10 1038 nclimate2226 ISSN 1758 6798 Heltzel Paul 2014 05 05 East Antarctica Melt Could Mean 10 Foot Sea Level Rise Seeker Retrieved 2019 01 22 Fox Kemper B Hewitt H T Xiao C Adalgeirsdottir G Drijfhout S S Edwards T L Golledge N R Hemer M Kopp R E Krinner G Mix A 2021 Masson Delmotte V Zhai P Pirani A Connors S L Pean C Berger S Caud N Chen Y Goldfarb L eds Ocean Cryosphere and Sea Level Change PDF Climate Change 2021 The Physical Science Basis Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change 2021 Cambridge UK and New York NY USA Cambridge University Press 1211 1362 doi 10 1017 9781009157896 011 ISBN 9781009157896 Armstrong McKay David Abrams Jesse Winkelmann Ricarda Sakschewski Boris Loriani Sina Fetzer Ingo Cornell Sarah Rockstrom Johan Staal Arie Lenton Timothy 9 September 2022 Exceeding 1 5 C global warming could trigger multiple climate tipping points Science 377 6611 eabn7950 doi 10 1126 science abn7950 hdl 10871 131584 ISSN 0036 8075 PMID 36074831 S2CID 252161375 Armstrong McKay David 9 September 2022 Exceeding 1 5 C global warming could trigger multiple climate tipping points paper explainer climatetippingpoints info Retrieved 2 October 2022 nbsp This article incorporates public domain material from Wilkes Basin Geographic Names Information System United States Geological Survey nbsp 75 0 S 145 0 E 75 000 S 145 000 E 75 000 145 000 nbsp This George V Land location article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Wilkes Basin amp oldid 1170021523, wikipedia, wiki, book, books, library,

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