Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica
Ice cores provide temporal records of surface mass balance (SMB). Coastal areas of Antarctica have relatively high and variable SMB, but are under-represented in records spanning more than 100 years. Here we present SMB reconstruction from a 120m-long ice core drilled in 2012 on the Derwael Ice Rise...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/242124 2023-05-15T13:37:30+02:00 Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica Philippe, Morgane Tison, Jean-Louis Fjosne, Karen Hubbard, Bryn Kjær, Helle Astrid Lenaerts, Jan T M Sheldon, G De Bondt, Kevin Claeys, Philippe Pattyn, Frank 2016 2 full-text file(s): application/pdf | application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/242124 https://dipot.ulb.ac.be/dspace/bitstream/2013/242124/3/Philippe2016_TC_IncreaseAccumulationDML.pdf https://dipot.ulb.ac.be/dspace/bitstream/2013/242124/4/doi_225751.pdf fr fre uri/info:doi/10.5194/tc-10-2501-2016 uri/info:scp/84993967412 https://dipot.ulb.ac.be/dspace/bitstream/2013/242124/3/Philippe2016_TC_IncreaseAccumulationDML.pdf https://dipot.ulb.ac.be/dspace/bitstream/2013/242124/4/doi_225751.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/242124 2 full-text file(s): info:eu-repo/semantics/restrictedAccess | info:eu-repo/semantics/openAccess The Cryosphere, 10 Sciences exactes et naturelles info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2016 ftunivbruxelles 2022-06-12T22:09:21Z Ice cores provide temporal records of surface mass balance (SMB). Coastal areas of Antarctica have relatively high and variable SMB, but are under-represented in records spanning more than 100 years. Here we present SMB reconstruction from a 120m-long ice core drilled in 2012 on the Derwael Ice Rise, coastal Dronning Maud Land, East Antarctica. Water stable isotope (δ18O and δD) stratigraphy is supplemented by discontinuous major ion profiles and continuous electrical conductivity measurements. The base of the ice core is dated to AD1759±16, providing a climate proxy for the past 1/4&250 years. The core's annual layer thickness history is combined with its gravimetric density profile to reconstruct the site's SMB history, corrected for the influence of ice deformation. The mean SMB for the core's entire history is 0.47±0.02m water equivalent (w.e.)a'1. The time series of reconstructed annual SMB shows high variability, but a general increase beginning in the 20th century. This increase is particularly marked during the last 50 years (1962–2011), which yields mean SMB of 0.61±0.01mw.e.a'1. This trend is compared with other reported SMB data in Antarctica, generally showing a high spatial variability. Output of the fully coupled Community Earth System Model (CESM) suggests that, although atmospheric circulation is the main factor influencing SMB, variability in sea surface temperatures and sea ice cover in the precipitation source region also explain part of the variability in SMB. Local snow redistribution can also influence interannual variability but is unlikely to influence long-term trends significantly. This is the first record from a coastal ice core in East Antarctica to show an increase in SMB beginning in the early 20th century and particularly marked during the last 50 years. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land East Antarctica ice core Sea ice The Cryosphere DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Dronning Maud Land East Antarctica |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
French |
topic |
Sciences exactes et naturelles |
spellingShingle |
Sciences exactes et naturelles Philippe, Morgane Tison, Jean-Louis Fjosne, Karen Hubbard, Bryn Kjær, Helle Astrid Lenaerts, Jan T M Sheldon, G De Bondt, Kevin Claeys, Philippe Pattyn, Frank Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica |
topic_facet |
Sciences exactes et naturelles |
description |
Ice cores provide temporal records of surface mass balance (SMB). Coastal areas of Antarctica have relatively high and variable SMB, but are under-represented in records spanning more than 100 years. Here we present SMB reconstruction from a 120m-long ice core drilled in 2012 on the Derwael Ice Rise, coastal Dronning Maud Land, East Antarctica. Water stable isotope (δ18O and δD) stratigraphy is supplemented by discontinuous major ion profiles and continuous electrical conductivity measurements. The base of the ice core is dated to AD1759±16, providing a climate proxy for the past 1/4&250 years. The core's annual layer thickness history is combined with its gravimetric density profile to reconstruct the site's SMB history, corrected for the influence of ice deformation. The mean SMB for the core's entire history is 0.47±0.02m water equivalent (w.e.)a'1. The time series of reconstructed annual SMB shows high variability, but a general increase beginning in the 20th century. This increase is particularly marked during the last 50 years (1962–2011), which yields mean SMB of 0.61±0.01mw.e.a'1. This trend is compared with other reported SMB data in Antarctica, generally showing a high spatial variability. Output of the fully coupled Community Earth System Model (CESM) suggests that, although atmospheric circulation is the main factor influencing SMB, variability in sea surface temperatures and sea ice cover in the precipitation source region also explain part of the variability in SMB. Local snow redistribution can also influence interannual variability but is unlikely to influence long-term trends significantly. This is the first record from a coastal ice core in East Antarctica to show an increase in SMB beginning in the early 20th century and particularly marked during the last 50 years. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Philippe, Morgane Tison, Jean-Louis Fjosne, Karen Hubbard, Bryn Kjær, Helle Astrid Lenaerts, Jan T M Sheldon, G De Bondt, Kevin Claeys, Philippe Pattyn, Frank |
author_facet |
Philippe, Morgane Tison, Jean-Louis Fjosne, Karen Hubbard, Bryn Kjær, Helle Astrid Lenaerts, Jan T M Sheldon, G De Bondt, Kevin Claeys, Philippe Pattyn, Frank |
author_sort |
Philippe, Morgane |
title |
Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica |
title_short |
Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica |
title_full |
Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica |
title_fullStr |
Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica |
title_full_unstemmed |
Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica |
title_sort |
ice core evidence for a 20th century increase in surface mass balance in coastal dronning maud land, east antarctica |
publishDate |
2016 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/242124 https://dipot.ulb.ac.be/dspace/bitstream/2013/242124/3/Philippe2016_TC_IncreaseAccumulationDML.pdf https://dipot.ulb.ac.be/dspace/bitstream/2013/242124/4/doi_225751.pdf |
geographic |
Dronning Maud Land East Antarctica |
geographic_facet |
Dronning Maud Land East Antarctica |
genre |
Antarc* Antarctica Dronning Maud Land East Antarctica ice core Sea ice The Cryosphere |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica ice core Sea ice The Cryosphere |
op_source |
The Cryosphere, 10 |
op_relation |
uri/info:doi/10.5194/tc-10-2501-2016 uri/info:scp/84993967412 https://dipot.ulb.ac.be/dspace/bitstream/2013/242124/3/Philippe2016_TC_IncreaseAccumulationDML.pdf https://dipot.ulb.ac.be/dspace/bitstream/2013/242124/4/doi_225751.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/242124 |
op_rights |
2 full-text file(s): info:eu-repo/semantics/restrictedAccess | info:eu-repo/semantics/openAccess |
_version_ |
1766092573246488576 |