The DTU21 global mean sea surface and first evaluation
A new mean sea surface (MSS) from the Technical University of Denmark (DTU) called DTU21MSS for referencing sea-level anomalies from satellite altimetry is introduced in this paper, and a suite of evaluations are performed. One of the reasons for updating the existing mean sea surface is the fact th...
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ftcopernicus:oai:publications.copernicus.org:essd111143 2023-10-09T21:49:15+02:00 The DTU21 global mean sea surface and first evaluation Andersen, Ole Baltazar Rose, Stine Kildegaard Abulaitijiang, Adili Zhang, Shengjun Fleury, Sara 2023-09-13 application/pdf https://doi.org/10.5194/essd-15-4065-2023 https://essd.copernicus.org/articles/15/4065/2023/ eng eng doi:10.5194/essd-15-4065-2023 https://essd.copernicus.org/articles/15/4065/2023/ eISSN: 1866-3516 Text 2023 ftcopernicus https://doi.org/10.5194/essd-15-4065-2023 2023-09-18T16:24:16Z A new mean sea surface (MSS) from the Technical University of Denmark (DTU) called DTU21MSS for referencing sea-level anomalies from satellite altimetry is introduced in this paper, and a suite of evaluations are performed. One of the reasons for updating the existing mean sea surface is the fact that during the last 6 years, nearly 3 times as many data have been made available by space agencies, resulting in more than 15 years of altimetry from long-repeat orbits (LROs) or geodetic missions. This includes the two interleaved long-repeat cycles of Jason-2 with a systematic cross-track distance as low as 4 km. A new processing chain with updated filtering and editing has been implemented for the DTU21MSS. This way, the DTU21MSS has been computed from 2 Hz altimetry in contrast to the former DTU15MSS and DTU18MSS which were computed from 1 Hz altimetry. The new DTU21MSS is computed over the same 20-year averaging time from 1 January 1993 to 31 December 2012 with a well-specified central time of 1 January 2003 and is available from https://doi.org/10.11583/DTU.19383221.v1 (Andersen, 2022). Cryosat-2 employs synthetic aperture radar (SAR) and SAR interferometric (SARin) modes in a large part of the Arctic Ocean due to the presence of sea ice. For SAR- and SARin-mode data we applied the SAMOSA + physical retracking to make it compatible with the physical retracker used for conventional low-resolution-mode data in other parts of the ocean. Text Arctic Arctic Ocean Sea ice Copernicus Publications: E-Journals Arctic Arctic Ocean Earth System Science Data 15 9 4065 4075 |
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Copernicus Publications: E-Journals |
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English |
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A new mean sea surface (MSS) from the Technical University of Denmark (DTU) called DTU21MSS for referencing sea-level anomalies from satellite altimetry is introduced in this paper, and a suite of evaluations are performed. One of the reasons for updating the existing mean sea surface is the fact that during the last 6 years, nearly 3 times as many data have been made available by space agencies, resulting in more than 15 years of altimetry from long-repeat orbits (LROs) or geodetic missions. This includes the two interleaved long-repeat cycles of Jason-2 with a systematic cross-track distance as low as 4 km. A new processing chain with updated filtering and editing has been implemented for the DTU21MSS. This way, the DTU21MSS has been computed from 2 Hz altimetry in contrast to the former DTU15MSS and DTU18MSS which were computed from 1 Hz altimetry. The new DTU21MSS is computed over the same 20-year averaging time from 1 January 1993 to 31 December 2012 with a well-specified central time of 1 January 2003 and is available from https://doi.org/10.11583/DTU.19383221.v1 (Andersen, 2022). Cryosat-2 employs synthetic aperture radar (SAR) and SAR interferometric (SARin) modes in a large part of the Arctic Ocean due to the presence of sea ice. For SAR- and SARin-mode data we applied the SAMOSA + physical retracking to make it compatible with the physical retracker used for conventional low-resolution-mode data in other parts of the ocean. |
format |
Text |
author |
Andersen, Ole Baltazar Rose, Stine Kildegaard Abulaitijiang, Adili Zhang, Shengjun Fleury, Sara |
spellingShingle |
Andersen, Ole Baltazar Rose, Stine Kildegaard Abulaitijiang, Adili Zhang, Shengjun Fleury, Sara The DTU21 global mean sea surface and first evaluation |
author_facet |
Andersen, Ole Baltazar Rose, Stine Kildegaard Abulaitijiang, Adili Zhang, Shengjun Fleury, Sara |
author_sort |
Andersen, Ole Baltazar |
title |
The DTU21 global mean sea surface and first evaluation |
title_short |
The DTU21 global mean sea surface and first evaluation |
title_full |
The DTU21 global mean sea surface and first evaluation |
title_fullStr |
The DTU21 global mean sea surface and first evaluation |
title_full_unstemmed |
The DTU21 global mean sea surface and first evaluation |
title_sort |
dtu21 global mean sea surface and first evaluation |
publishDate |
2023 |
url |
https://doi.org/10.5194/essd-15-4065-2023 https://essd.copernicus.org/articles/15/4065/2023/ |
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Arctic Arctic Ocean |
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Arctic Arctic Ocean |
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Arctic Arctic Ocean Sea ice |
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Arctic Arctic Ocean Sea ice |
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eISSN: 1866-3516 |
op_relation |
doi:10.5194/essd-15-4065-2023 https://essd.copernicus.org/articles/15/4065/2023/ |
op_doi |
https://doi.org/10.5194/essd-15-4065-2023 |
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Earth System Science Data |
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15 |
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9 |
container_start_page |
4065 |
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4075 |
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1779312269264420864 |