The regional-scale surface mass balance of Pine Island Glacier, West Antarctica, over the period 2005–2014, derived from airborne radar soundings and neutron probe measurements
We derive recent surface mass balance (SMB) estimates from airborne radar observations along the iSTAR traverse (2013, 2014) at Pine Island Glacier (PIG), West Antarctica. Ground-based neutron probe measurements provide information of snow and firn density with depth at 22 locations and were used to...
Published in: | The Cryosphere |
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Language: | English |
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Copernicus Publications
2021
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00055892 2023-05-15T13:37:34+02:00 The regional-scale surface mass balance of Pine Island Glacier, West Antarctica, over the period 2005–2014, derived from airborne radar soundings and neutron probe measurements Kowalewski, Stefan Helm, Veit Morris, Elizabeth Mary Eisen, Olaf 2021-03 electronic https://doi.org/10.5194/tc-15-1285-2021 https://noa.gwlb.de/receive/cop_mods_00055892 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055543/tc-15-1285-2021.pdf https://tc.copernicus.org/articles/15/1285/2021/tc-15-1285-2021.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-15-1285-2021 https://noa.gwlb.de/receive/cop_mods_00055892 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055543/tc-15-1285-2021.pdf https://tc.copernicus.org/articles/15/1285/2021/tc-15-1285-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/tc-15-1285-2021 2022-02-08T22:34:20Z We derive recent surface mass balance (SMB) estimates from airborne radar observations along the iSTAR traverse (2013, 2014) at Pine Island Glacier (PIG), West Antarctica. Ground-based neutron probe measurements provide information of snow and firn density with depth at 22 locations and were used to date internal annual reflection layers. The 2005 layer was traced for a total distance of 2367 km to determine annual mean SMB for the period 2005–2014. Using complementary SMB estimates from two regional climate models, RACMO2.3p2 and MAR, and a geostatistical kriging scheme, we determine a regional-scale SMB distribution with similar main characteristics to that determined for the period 1985–2009 in previous studies. Local departures exist for the northern PIG slopes, where the orographic precipitation shadow effect appears to be more pronounced in our observations, and the southward interior, where the SMB gradient is more pronounced in previous studies. We derive total mass inputs of 79.9±19.2 and 82.1±19.2 Gt yr−1 to the PIG basin based on complementary ASIRAS–RACMO and ASIRAS–MAR SMB estimates, respectively. These are not significantly different to the value of 78.3±6.8 Gt yr−1 for the period 1985–2009. Thus, there is no evidence of a secular trend at decadal scales in total mass input to the PIG basin. We note, however, that our estimated uncertainty is more than twice the uncertainty for the 1985–2009 estimate on total mass input. Our error analysis indicates that uncertainty estimates on total mass input are highly sensitive to the selected krige methodology and assumptions made on the interpolation error, which we identify as the main cause for the increased uncertainty range compared to the 1985–2009 estimates. Article in Journal/Newspaper Antarc* Antarctica Pine Island Pine Island Glacier The Cryosphere West Antarctica Niedersächsisches Online-Archiv NOA Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) West Antarctica The Cryosphere 15 3 1285 1305 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Kowalewski, Stefan Helm, Veit Morris, Elizabeth Mary Eisen, Olaf The regional-scale surface mass balance of Pine Island Glacier, West Antarctica, over the period 2005–2014, derived from airborne radar soundings and neutron probe measurements |
topic_facet |
article Verlagsveröffentlichung |
description |
We derive recent surface mass balance (SMB) estimates from airborne radar observations along the iSTAR traverse (2013, 2014) at Pine Island Glacier (PIG), West Antarctica. Ground-based neutron probe measurements provide information of snow and firn density with depth at 22 locations and were used to date internal annual reflection layers. The 2005 layer was traced for a total distance of 2367 km to determine annual mean SMB for the period 2005–2014. Using complementary SMB estimates from two regional climate models, RACMO2.3p2 and MAR, and a geostatistical kriging scheme, we determine a regional-scale SMB distribution with similar main characteristics to that determined for the period 1985–2009 in previous studies. Local departures exist for the northern PIG slopes, where the orographic precipitation shadow effect appears to be more pronounced in our observations, and the southward interior, where the SMB gradient is more pronounced in previous studies. We derive total mass inputs of 79.9±19.2 and 82.1±19.2 Gt yr−1 to the PIG basin based on complementary ASIRAS–RACMO and ASIRAS–MAR SMB estimates, respectively. These are not significantly different to the value of 78.3±6.8 Gt yr−1 for the period 1985–2009. Thus, there is no evidence of a secular trend at decadal scales in total mass input to the PIG basin. We note, however, that our estimated uncertainty is more than twice the uncertainty for the 1985–2009 estimate on total mass input. Our error analysis indicates that uncertainty estimates on total mass input are highly sensitive to the selected krige methodology and assumptions made on the interpolation error, which we identify as the main cause for the increased uncertainty range compared to the 1985–2009 estimates. |
format |
Article in Journal/Newspaper |
author |
Kowalewski, Stefan Helm, Veit Morris, Elizabeth Mary Eisen, Olaf |
author_facet |
Kowalewski, Stefan Helm, Veit Morris, Elizabeth Mary Eisen, Olaf |
author_sort |
Kowalewski, Stefan |
title |
The regional-scale surface mass balance of Pine Island Glacier, West Antarctica, over the period 2005–2014, derived from airborne radar soundings and neutron probe measurements |
title_short |
The regional-scale surface mass balance of Pine Island Glacier, West Antarctica, over the period 2005–2014, derived from airborne radar soundings and neutron probe measurements |
title_full |
The regional-scale surface mass balance of Pine Island Glacier, West Antarctica, over the period 2005–2014, derived from airborne radar soundings and neutron probe measurements |
title_fullStr |
The regional-scale surface mass balance of Pine Island Glacier, West Antarctica, over the period 2005–2014, derived from airborne radar soundings and neutron probe measurements |
title_full_unstemmed |
The regional-scale surface mass balance of Pine Island Glacier, West Antarctica, over the period 2005–2014, derived from airborne radar soundings and neutron probe measurements |
title_sort |
regional-scale surface mass balance of pine island glacier, west antarctica, over the period 2005–2014, derived from airborne radar soundings and neutron probe measurements |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-1285-2021 https://noa.gwlb.de/receive/cop_mods_00055892 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055543/tc-15-1285-2021.pdf https://tc.copernicus.org/articles/15/1285/2021/tc-15-1285-2021.pdf |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Pine Island Glacier West Antarctica |
geographic_facet |
Pine Island Glacier West Antarctica |
genre |
Antarc* Antarctica Pine Island Pine Island Glacier The Cryosphere West Antarctica |
genre_facet |
Antarc* Antarctica Pine Island Pine Island Glacier The Cryosphere West Antarctica |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-15-1285-2021 https://noa.gwlb.de/receive/cop_mods_00055892 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00055543/tc-15-1285-2021.pdf https://tc.copernicus.org/articles/15/1285/2021/tc-15-1285-2021.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-15-1285-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
3 |
container_start_page |
1285 |
op_container_end_page |
1305 |
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1766094122454614016 |