Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry
We developed a multi-mission satellite altimetry analysis over the Antarctic Ice Sheet which comprises Seasat, Geosat, ERS-1, ERS-2, Envisat, ICESat and CryoSat-2. After a consistent reprocessing and a stepwise calibration of the inter-mission offsets, we obtained monthly grids of multi-mission surf...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/377954 2023-11-12T04:04:38+01:00 Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry Schröder, Ludwig Horwath, Martin Dietrich, Reinhard Helm, Veit Van Den Broeke, Michiel R. Ligtenberg, Stefan R.M. Sub Dynamics Meteorology Marine and Atmospheric Research 2019-02-05 image/pdf https://dspace.library.uu.nl/handle/1874/377954 en eng 1994-0416 https://dspace.library.uu.nl/handle/1874/377954 info:eu-repo/semantics/OpenAccess Water Science and Technology Earth-Surface Processes Article 2019 ftunivutrecht 2023-11-01T23:20:23Z We developed a multi-mission satellite altimetry analysis over the Antarctic Ice Sheet which comprises Seasat, Geosat, ERS-1, ERS-2, Envisat, ICESat and CryoSat-2. After a consistent reprocessing and a stepwise calibration of the inter-mission offsets, we obtained monthly grids of multi-mission surface elevation change (SEC) with respect to the reference epoch 09/2010 (in the format of month/year) from 1978 to 2017. A validation with independent elevation changes from in situ and airborne observations as well as a comparison with a firn model proves that the different missions and observation modes have been successfully combined to a seamless multi-mission time series. For coastal East Antarctica, even Seasat and Geosat provide reliable information and, hence, allow for the analysis of four decades of elevation changes. The spatial and temporal resolution of our result allows for the identification of when and where significant changes in elevation occurred. These time series add detailed information to the evolution of surface elevation in such key regions as Pine Island Glacier, Totten Glacier, Dronning Maud Land or Lake Vostok. After applying a density mask, we calculated time series of mass changes and found that the Antarctic Ice Sheet north of 81.5° S was losing mass at an average rate of-85±16 Gt yr-1 between 1992 and 2017, which accelerated to-137±25 Gt yr-1 after 2010. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Pine Island Pine Island Glacier Totten Glacier Utrecht University Repository Antarctic Dronning Maud Land East Antarctica Lake Vostok ENVELOPE(106.000,106.000,-77.500,-77.500) Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) The Antarctic Totten Glacier ENVELOPE(116.333,116.333,-66.833,-66.833) |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Water Science and Technology Earth-Surface Processes |
spellingShingle |
Water Science and Technology Earth-Surface Processes Schröder, Ludwig Horwath, Martin Dietrich, Reinhard Helm, Veit Van Den Broeke, Michiel R. Ligtenberg, Stefan R.M. Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry |
topic_facet |
Water Science and Technology Earth-Surface Processes |
description |
We developed a multi-mission satellite altimetry analysis over the Antarctic Ice Sheet which comprises Seasat, Geosat, ERS-1, ERS-2, Envisat, ICESat and CryoSat-2. After a consistent reprocessing and a stepwise calibration of the inter-mission offsets, we obtained monthly grids of multi-mission surface elevation change (SEC) with respect to the reference epoch 09/2010 (in the format of month/year) from 1978 to 2017. A validation with independent elevation changes from in situ and airborne observations as well as a comparison with a firn model proves that the different missions and observation modes have been successfully combined to a seamless multi-mission time series. For coastal East Antarctica, even Seasat and Geosat provide reliable information and, hence, allow for the analysis of four decades of elevation changes. The spatial and temporal resolution of our result allows for the identification of when and where significant changes in elevation occurred. These time series add detailed information to the evolution of surface elevation in such key regions as Pine Island Glacier, Totten Glacier, Dronning Maud Land or Lake Vostok. After applying a density mask, we calculated time series of mass changes and found that the Antarctic Ice Sheet north of 81.5° S was losing mass at an average rate of-85±16 Gt yr-1 between 1992 and 2017, which accelerated to-137±25 Gt yr-1 after 2010. |
author2 |
Sub Dynamics Meteorology Marine and Atmospheric Research |
format |
Article in Journal/Newspaper |
author |
Schröder, Ludwig Horwath, Martin Dietrich, Reinhard Helm, Veit Van Den Broeke, Michiel R. Ligtenberg, Stefan R.M. |
author_facet |
Schröder, Ludwig Horwath, Martin Dietrich, Reinhard Helm, Veit Van Den Broeke, Michiel R. Ligtenberg, Stefan R.M. |
author_sort |
Schröder, Ludwig |
title |
Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry |
title_short |
Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry |
title_full |
Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry |
title_fullStr |
Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry |
title_full_unstemmed |
Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry |
title_sort |
four decades of antarctic surface elevation changes from multi-mission satellite altimetry |
publishDate |
2019 |
url |
https://dspace.library.uu.nl/handle/1874/377954 |
long_lat |
ENVELOPE(106.000,106.000,-77.500,-77.500) ENVELOPE(-101.000,-101.000,-75.000,-75.000) ENVELOPE(116.333,116.333,-66.833,-66.833) |
geographic |
Antarctic Dronning Maud Land East Antarctica Lake Vostok Pine Island Glacier The Antarctic Totten Glacier |
geographic_facet |
Antarctic Dronning Maud Land East Antarctica Lake Vostok Pine Island Glacier The Antarctic Totten Glacier |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Pine Island Pine Island Glacier Totten Glacier |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Pine Island Pine Island Glacier Totten Glacier |
op_relation |
1994-0416 https://dspace.library.uu.nl/handle/1874/377954 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782341712830529536 |