Components of 21 years (1995-2015) of absolute sea level trends in the Arctic
The Arctic Ocean is at the frontier of the fast-changing climate in the northern latitudes, and sea level trends are a bulk measure of ongoing processes related to climate change. Observations of sea level in the Arctic Ocean are nonetheless difficult to validate with independent measurements, and t...
Published in: | Ocean Science |
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2022
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Online Access: | https://orbit.dtu.dk/en/publications/f9baeef8-f553-4e4d-ae3e-2346f3bcbe29 https://doi.org/10.5194/os-18-109-2022 https://backend.orbit.dtu.dk/ws/files/269479196/os_18_109_2022.pdf https://doi.org/10.11583/DTU.19785409.v2 |
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ftdtupubl:oai:pure.atira.dk:publications/f9baeef8-f553-4e4d-ae3e-2346f3bcbe29 2024-06-23T07:45:46+00:00 Components of 21 years (1995-2015) of absolute sea level trends in the Arctic Ludwigsen, Carsten Bjerre Andersen, Ole Baltazar Rose, Stine Kildegaard 2022 application/pdf https://orbit.dtu.dk/en/publications/f9baeef8-f553-4e4d-ae3e-2346f3bcbe29 https://doi.org/10.5194/os-18-109-2022 https://backend.orbit.dtu.dk/ws/files/269479196/os_18_109_2022.pdf https://doi.org/10.11583/DTU.19785409.v2 eng eng https://orbit.dtu.dk/en/publications/f9baeef8-f553-4e4d-ae3e-2346f3bcbe29 info:eu-repo/semantics/openAccess Ludwigsen , C B , Andersen , O B & Rose , S K 2022 , ' Components of 21 years (1995-2015) of absolute sea level trends in the Arctic ' , Ocean Science , vol. 18 , no. 1 , pp. 109-127 . https://doi.org/10.5194/os-18-109-2022 /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action article 2022 ftdtupubl https://doi.org/10.5194/os-18-109-202210.11583/DTU.19785409.v2 2024-06-11T15:07:42Z The Arctic Ocean is at the frontier of the fast-changing climate in the northern latitudes, and sea level trends are a bulk measure of ongoing processes related to climate change. Observations of sea level in the Arctic Ocean are nonetheless difficult to validate with independent measurements, and this is globally the region where the sea level trend (SLT) is most uncertain. The aim of this study is to create a satellite-independent reconstruction of Arctic SLT, as it is observed by altimetry and tide gauges (TGs). Previous studies use Gravity Recovery and Climate Experiment (GRACE) observations to estimate the manometric (mass component of) SLT. GRACE estimates, however, are challenged by large mass changes on land, which are difficult to separate from much smaller ocean mass changes. Furthermore, GRACE is not available before 2003, which significantly limits the period and makes the trend more vulnerable to short-term changes. As an alternative approach, this study estimates the climate-change-driven Arctic manometric SLT from the Arctic sea level fingerprints of glaciers, Greenland, Antarctica and glacial isostatic adjustment (GIA) with the addition of the long-term inverse barometer (IB) effect. The halosteric and thermosteric components complete the reconstructed Arctic SLT and are estimated by interpolating 300 000 temperature ( T ) and salinity ( S ) in situ observations. The SLT from 1995–2015 is compared to the observed SLT from altimetry and 12 selected tide gauges (TGs) corrected for vertical land movement (VLM). The reconstructed estimate manifests the salinity-driven halosteric component as dominating the spatial SLT pattern with variations between −7 and 10 mm yr −1 . The manometric SLT in comparison is estimated to be 1–2 mm yr −1 for most of the Arctic Ocean. The reconstructed SLT shows a larger sea level rise in the Beaufort Sea compared to altimetry, an issue that is also identified by previous studies. There is a TG-observed sea level rise in the Siberian Arctic in contrast to the sea level ... Article in Journal/Newspaper Antarc* Antarctica Arctic Arctic Arctic Ocean Beaufort Sea Climate change Greenland Technical University of Denmark: DTU Orbit Arctic Arctic Ocean Greenland Ocean Science 18 1 109 127 |
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Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Ludwigsen, Carsten Bjerre Andersen, Ole Baltazar Rose, Stine Kildegaard Components of 21 years (1995-2015) of absolute sea level trends in the Arctic |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
The Arctic Ocean is at the frontier of the fast-changing climate in the northern latitudes, and sea level trends are a bulk measure of ongoing processes related to climate change. Observations of sea level in the Arctic Ocean are nonetheless difficult to validate with independent measurements, and this is globally the region where the sea level trend (SLT) is most uncertain. The aim of this study is to create a satellite-independent reconstruction of Arctic SLT, as it is observed by altimetry and tide gauges (TGs). Previous studies use Gravity Recovery and Climate Experiment (GRACE) observations to estimate the manometric (mass component of) SLT. GRACE estimates, however, are challenged by large mass changes on land, which are difficult to separate from much smaller ocean mass changes. Furthermore, GRACE is not available before 2003, which significantly limits the period and makes the trend more vulnerable to short-term changes. As an alternative approach, this study estimates the climate-change-driven Arctic manometric SLT from the Arctic sea level fingerprints of glaciers, Greenland, Antarctica and glacial isostatic adjustment (GIA) with the addition of the long-term inverse barometer (IB) effect. The halosteric and thermosteric components complete the reconstructed Arctic SLT and are estimated by interpolating 300 000 temperature ( T ) and salinity ( S ) in situ observations. The SLT from 1995–2015 is compared to the observed SLT from altimetry and 12 selected tide gauges (TGs) corrected for vertical land movement (VLM). The reconstructed estimate manifests the salinity-driven halosteric component as dominating the spatial SLT pattern with variations between −7 and 10 mm yr −1 . The manometric SLT in comparison is estimated to be 1–2 mm yr −1 for most of the Arctic Ocean. The reconstructed SLT shows a larger sea level rise in the Beaufort Sea compared to altimetry, an issue that is also identified by previous studies. There is a TG-observed sea level rise in the Siberian Arctic in contrast to the sea level ... |
format |
Article in Journal/Newspaper |
author |
Ludwigsen, Carsten Bjerre Andersen, Ole Baltazar Rose, Stine Kildegaard |
author_facet |
Ludwigsen, Carsten Bjerre Andersen, Ole Baltazar Rose, Stine Kildegaard |
author_sort |
Ludwigsen, Carsten Bjerre |
title |
Components of 21 years (1995-2015) of absolute sea level trends in the Arctic |
title_short |
Components of 21 years (1995-2015) of absolute sea level trends in the Arctic |
title_full |
Components of 21 years (1995-2015) of absolute sea level trends in the Arctic |
title_fullStr |
Components of 21 years (1995-2015) of absolute sea level trends in the Arctic |
title_full_unstemmed |
Components of 21 years (1995-2015) of absolute sea level trends in the Arctic |
title_sort |
components of 21 years (1995-2015) of absolute sea level trends in the arctic |
publishDate |
2022 |
url |
https://orbit.dtu.dk/en/publications/f9baeef8-f553-4e4d-ae3e-2346f3bcbe29 https://doi.org/10.5194/os-18-109-2022 https://backend.orbit.dtu.dk/ws/files/269479196/os_18_109_2022.pdf https://doi.org/10.11583/DTU.19785409.v2 |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Antarc* Antarctica Arctic Arctic Arctic Ocean Beaufort Sea Climate change Greenland |
genre_facet |
Antarc* Antarctica Arctic Arctic Arctic Ocean Beaufort Sea Climate change Greenland |
op_source |
Ludwigsen , C B , Andersen , O B & Rose , S K 2022 , ' Components of 21 years (1995-2015) of absolute sea level trends in the Arctic ' , Ocean Science , vol. 18 , no. 1 , pp. 109-127 . https://doi.org/10.5194/os-18-109-2022 |
op_relation |
https://orbit.dtu.dk/en/publications/f9baeef8-f553-4e4d-ae3e-2346f3bcbe29 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/os-18-109-202210.11583/DTU.19785409.v2 |
container_title |
Ocean Science |
container_volume |
18 |
container_issue |
1 |
container_start_page |
109 |
op_container_end_page |
127 |
_version_ |
1802642269038182400 |