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...
Published in: | The Cryosphere |
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COPERNICUS GESELLSCHAFT MBH
2019
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Online Access: | https://epic.awi.de/id/eprint/49034/ https://epic.awi.de/id/eprint/49034/1/tc-13-427-2019.pdf https://www.the-cryosphere.net/13/427/2019/ https://hdl.handle.net/10013/epic.7e15faaf-f259-4575-86b2-5345f9cba9e5 https://hdl.handle.net/ |
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ftawi:oai:epic.awi.de:49034 2023-05-15T13:45:21+02:00 Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry Schröder, L. Horwath, M. Dietrich, R. Helm, V. van den Broeke, M. R. Ligtenberg, S. R. M. 2019-02-05 application/pdf https://epic.awi.de/id/eprint/49034/ https://epic.awi.de/id/eprint/49034/1/tc-13-427-2019.pdf https://www.the-cryosphere.net/13/427/2019/ https://hdl.handle.net/10013/epic.7e15faaf-f259-4575-86b2-5345f9cba9e5 https://hdl.handle.net/ unknown COPERNICUS GESELLSCHAFT MBH https://epic.awi.de/id/eprint/49034/1/tc-13-427-2019.pdf https://hdl.handle.net/ Schröder, L. orcid:0000-0002-6862-0930 , Horwath, M. , Dietrich, R. , Helm, V. orcid:0000-0001-7788-9328 , van den Broeke, M. R. and Ligtenberg, S. R. M. (2019) Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry , The Cryosphere, 13 (2), pp. 427-449 . doi:10.5194/tc-13-427-2019 <https://doi.org/10.5194/tc-13-427-2019> , hdl:10013/epic.7e15faaf-f259-4575-86b2-5345f9cba9e5 EPIC3The Cryosphere, COPERNICUS GESELLSCHAFT MBH, 13(2), pp. 427-449, ISSN: 1994-0416 Article isiRev 2019 ftawi https://doi.org/10.5194/tc-13-427-2019 2021-12-24T15:44:31Z 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 The Cryosphere Totten Glacier Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) 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) The Cryosphere 13 2 427 449 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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. |
format |
Article in Journal/Newspaper |
author |
Schröder, L. Horwath, M. Dietrich, R. Helm, V. van den Broeke, M. R. Ligtenberg, S. R. M. |
spellingShingle |
Schröder, L. Horwath, M. Dietrich, R. Helm, V. van den Broeke, M. R. Ligtenberg, S. R. M. Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry |
author_facet |
Schröder, L. Horwath, M. Dietrich, R. Helm, V. van den Broeke, M. R. Ligtenberg, S. R. M. |
author_sort |
Schröder, L. |
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 |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2019 |
url |
https://epic.awi.de/id/eprint/49034/ https://epic.awi.de/id/eprint/49034/1/tc-13-427-2019.pdf https://www.the-cryosphere.net/13/427/2019/ https://hdl.handle.net/10013/epic.7e15faaf-f259-4575-86b2-5345f9cba9e5 https://hdl.handle.net/ |
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 The Cryosphere Totten Glacier |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Pine Island Pine Island Glacier The Cryosphere Totten Glacier |
op_source |
EPIC3The Cryosphere, COPERNICUS GESELLSCHAFT MBH, 13(2), pp. 427-449, ISSN: 1994-0416 |
op_relation |
https://epic.awi.de/id/eprint/49034/1/tc-13-427-2019.pdf https://hdl.handle.net/ Schröder, L. orcid:0000-0002-6862-0930 , Horwath, M. , Dietrich, R. , Helm, V. orcid:0000-0001-7788-9328 , van den Broeke, M. R. and Ligtenberg, S. R. M. (2019) Four decades of Antarctic surface elevation changes from multi-mission satellite altimetry , The Cryosphere, 13 (2), pp. 427-449 . doi:10.5194/tc-13-427-2019 <https://doi.org/10.5194/tc-13-427-2019> , hdl:10013/epic.7e15faaf-f259-4575-86b2-5345f9cba9e5 |
op_doi |
https://doi.org/10.5194/tc-13-427-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
2 |
container_start_page |
427 |
op_container_end_page |
449 |
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1766221494934831104 |