Deliverable 6.20 Observing systems for sea level in the Arctic
The Arctic Ocean is at the frontier of the fast-changing climate in the northern latitudes and sea level trends is a bulk measure of ongoing processes related climate change. Observations of sea level in the Arctic Ocean are nonetheless difficult to validate with independent measurements and is glob...
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ftzenodo:oai:zenodo.org:7180352 2023-05-15T14:33:14+02:00 Deliverable 6.20 Observing systems for sea level in the Arctic Ludwigsen, Carsten Bjerre Andersen, Ole Baltazar 2021-11-15 https://zenodo.org/record/7180352 https://doi.org/10.5281/zenodo.7180352 eng eng info:eu-repo/grantAgreement/EC/H2020/727890/ doi:10.5281/zenodo.7180351 https://zenodo.org/communities/intaros-h2020 https://zenodo.org/record/7180352 https://doi.org/10.5281/zenodo.7180352 oai:zenodo.org:7180352 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode Arctic INTAROS Ocean Observing Systems Sea Level Satellite Altimetry In Situ Data info:eu-repo/semantics/report publication-deliverable 2021 ftzenodo https://doi.org/10.5281/zenodo.718035210.5281/zenodo.7180351 2023-03-10T22:10:27Z The Arctic Ocean is at the frontier of the fast-changing climate in the northern latitudes and sea level trends is a bulk measure of ongoing processes related climate change. Observations of sea level in the Arctic Ocean are nonetheless difficult to validate with independent measurements and is globally the region where the sea level change is most uncertain. By using specialized methods for observing sea level with satellite altimetry over sea ice regions in the Arctic, we are able to construct an altimetric sea level record that is in good agreement with the sea level observed by tide gauges. However, long-term changes of tide-gauges are influenced by vertical land motion (VLM) caused by past and present changes of ice. A novel model of the elastic rebound from present changes of Arctic ice has been applied to create a VLM-model that agrees well with GNSS. Sea level change from altimetry and VLM-corrected tide gauges are compared to a reconstructed sea level estimate, derived from the sea level fingerprints of present-day mass changes and steric sea level change derived from available arctic T/S-profiles. The comparison shows that the freshwater change is dominating the Arctic sea level change. Several recommendations have been outlined, to improve future analysis and observations of Arctic Ocean sea level. The most important is the lack of in-situ data in several regions of the Arctic Ocean that are necessary to validate the observations from remote sensing. Report Arctic Arctic Ocean Climate change Sea ice Zenodo Arctic Arctic Ocean |
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Arctic INTAROS Ocean Observing Systems Sea Level Satellite Altimetry In Situ Data |
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Arctic INTAROS Ocean Observing Systems Sea Level Satellite Altimetry In Situ Data Ludwigsen, Carsten Bjerre Andersen, Ole Baltazar Deliverable 6.20 Observing systems for sea level in the Arctic |
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Arctic INTAROS Ocean Observing Systems Sea Level Satellite Altimetry In Situ Data |
description |
The Arctic Ocean is at the frontier of the fast-changing climate in the northern latitudes and sea level trends is a bulk measure of ongoing processes related climate change. Observations of sea level in the Arctic Ocean are nonetheless difficult to validate with independent measurements and is globally the region where the sea level change is most uncertain. By using specialized methods for observing sea level with satellite altimetry over sea ice regions in the Arctic, we are able to construct an altimetric sea level record that is in good agreement with the sea level observed by tide gauges. However, long-term changes of tide-gauges are influenced by vertical land motion (VLM) caused by past and present changes of ice. A novel model of the elastic rebound from present changes of Arctic ice has been applied to create a VLM-model that agrees well with GNSS. Sea level change from altimetry and VLM-corrected tide gauges are compared to a reconstructed sea level estimate, derived from the sea level fingerprints of present-day mass changes and steric sea level change derived from available arctic T/S-profiles. The comparison shows that the freshwater change is dominating the Arctic sea level change. Several recommendations have been outlined, to improve future analysis and observations of Arctic Ocean sea level. The most important is the lack of in-situ data in several regions of the Arctic Ocean that are necessary to validate the observations from remote sensing. |
format |
Report |
author |
Ludwigsen, Carsten Bjerre Andersen, Ole Baltazar |
author_facet |
Ludwigsen, Carsten Bjerre Andersen, Ole Baltazar |
author_sort |
Ludwigsen, Carsten Bjerre |
title |
Deliverable 6.20 Observing systems for sea level in the Arctic |
title_short |
Deliverable 6.20 Observing systems for sea level in the Arctic |
title_full |
Deliverable 6.20 Observing systems for sea level in the Arctic |
title_fullStr |
Deliverable 6.20 Observing systems for sea level in the Arctic |
title_full_unstemmed |
Deliverable 6.20 Observing systems for sea level in the Arctic |
title_sort |
deliverable 6.20 observing systems for sea level in the arctic |
publishDate |
2021 |
url |
https://zenodo.org/record/7180352 https://doi.org/10.5281/zenodo.7180352 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Climate change Sea ice |
genre_facet |
Arctic Arctic Ocean Climate change Sea ice |
op_relation |
info:eu-repo/grantAgreement/EC/H2020/727890/ doi:10.5281/zenodo.7180351 https://zenodo.org/communities/intaros-h2020 https://zenodo.org/record/7180352 https://doi.org/10.5281/zenodo.7180352 oai:zenodo.org:7180352 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.718035210.5281/zenodo.7180351 |
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1766306505366175744 |