Elevation change of the Antarctic Ice Sheet: 1985 to 2020
The largest uncertainty in future projections of sea level change comes from the uncertain response of the Antarctic Ice Sheet to the warming oceans and atmosphere. The ice sheet gains roughly 2000 km 3 of ice from precipitation each year and loses a similar amount through solid ice discharge into t...
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ftdoajarticles:oai:doaj.org/article:a65ac0e7a276467f91581fb20cfa70e8 2023-05-15T13:51:27+02:00 Elevation change of the Antarctic Ice Sheet: 1985 to 2020 J. Nilsson A. S. Gardner F. S. Paolo 2022-08-01T00:00:00Z https://doi.org/10.5194/essd-14-3573-2022 https://doaj.org/article/a65ac0e7a276467f91581fb20cfa70e8 EN eng Copernicus Publications https://essd.copernicus.org/articles/14/3573/2022/essd-14-3573-2022.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-14-3573-2022 1866-3508 1866-3516 https://doaj.org/article/a65ac0e7a276467f91581fb20cfa70e8 Earth System Science Data, Vol 14, Pp 3573-3598 (2022) Environmental sciences GE1-350 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.5194/essd-14-3573-2022 2022-12-30T20:40:01Z The largest uncertainty in future projections of sea level change comes from the uncertain response of the Antarctic Ice Sheet to the warming oceans and atmosphere. The ice sheet gains roughly 2000 km 3 of ice from precipitation each year and loses a similar amount through solid ice discharge into the surrounding oceans. Numerous studies have shown that the ice sheet is currently out of long-term equilibrium, losing mass at an accelerated rate and increasing sea level rise. Projections of sea level change rely on accurate estimates of the contribution of land ice to the contemporary sea level budget. The longest observational record available to study the mass balance of the Earth's ice sheets comes from satellite altimeters. This record, however, consists of multiple satellite missions with different life spans and inconsistent measurement types (radar and laser) of varying quality. To fully utilize these data, measurements from different missions must be cross-calibrated and integrated into a consistent record of change. Here, we present a novel approach for generating such a record that implies improved topography removal, cross-calibration, and normalization of seasonal amplitudes from different mission. We describe in detail the advanced geophysical corrections applied and the processes needed to derive elevation change estimates. We processed the full archive record of satellite altimetry data, providing a seamless record of elevation change for the Antarctic Ice Sheet that spans the period 1985 to 2020. The data are produced and distributed as part of the NASA MEaSUREs ITS_LIVE (Making Earth System Data Records for Use in Research Environments Inter-mission Time Series of Land Ice Velocity and Elevation) project (Nilsson et al., 2021, DOI: https://doi.org/10.5067/L3LSVDZS15ZV ). Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Earth System Science Data 14 8 3573 3598 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
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Environmental sciences GE1-350 Geology QE1-996.5 J. Nilsson A. S. Gardner F. S. Paolo Elevation change of the Antarctic Ice Sheet: 1985 to 2020 |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
The largest uncertainty in future projections of sea level change comes from the uncertain response of the Antarctic Ice Sheet to the warming oceans and atmosphere. The ice sheet gains roughly 2000 km 3 of ice from precipitation each year and loses a similar amount through solid ice discharge into the surrounding oceans. Numerous studies have shown that the ice sheet is currently out of long-term equilibrium, losing mass at an accelerated rate and increasing sea level rise. Projections of sea level change rely on accurate estimates of the contribution of land ice to the contemporary sea level budget. The longest observational record available to study the mass balance of the Earth's ice sheets comes from satellite altimeters. This record, however, consists of multiple satellite missions with different life spans and inconsistent measurement types (radar and laser) of varying quality. To fully utilize these data, measurements from different missions must be cross-calibrated and integrated into a consistent record of change. Here, we present a novel approach for generating such a record that implies improved topography removal, cross-calibration, and normalization of seasonal amplitudes from different mission. We describe in detail the advanced geophysical corrections applied and the processes needed to derive elevation change estimates. We processed the full archive record of satellite altimetry data, providing a seamless record of elevation change for the Antarctic Ice Sheet that spans the period 1985 to 2020. The data are produced and distributed as part of the NASA MEaSUREs ITS_LIVE (Making Earth System Data Records for Use in Research Environments Inter-mission Time Series of Land Ice Velocity and Elevation) project (Nilsson et al., 2021, DOI: https://doi.org/10.5067/L3LSVDZS15ZV ). |
format |
Article in Journal/Newspaper |
author |
J. Nilsson A. S. Gardner F. S. Paolo |
author_facet |
J. Nilsson A. S. Gardner F. S. Paolo |
author_sort |
J. Nilsson |
title |
Elevation change of the Antarctic Ice Sheet: 1985 to 2020 |
title_short |
Elevation change of the Antarctic Ice Sheet: 1985 to 2020 |
title_full |
Elevation change of the Antarctic Ice Sheet: 1985 to 2020 |
title_fullStr |
Elevation change of the Antarctic Ice Sheet: 1985 to 2020 |
title_full_unstemmed |
Elevation change of the Antarctic Ice Sheet: 1985 to 2020 |
title_sort |
elevation change of the antarctic ice sheet: 1985 to 2020 |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/essd-14-3573-2022 https://doaj.org/article/a65ac0e7a276467f91581fb20cfa70e8 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
Earth System Science Data, Vol 14, Pp 3573-3598 (2022) |
op_relation |
https://essd.copernicus.org/articles/14/3573/2022/essd-14-3573-2022.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-14-3573-2022 1866-3508 1866-3516 https://doaj.org/article/a65ac0e7a276467f91581fb20cfa70e8 |
op_doi |
https://doi.org/10.5194/essd-14-3573-2022 |
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Earth System Science Data |
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14 |
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8 |
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3573 |
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3598 |
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