Arctic sea level variability from high-resolution model simulations and implications for the Arctic observing system
Two high-resolution model simulations are used to investigate the spatiotemporal variability of the Arctic Ocean sea level. The model simulations reveal barotropic sea level variability at periods of < 30 d, which is strongly captured by bottom pressure observations. The seasonal sea level variab...
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ftcopernicus:oai:publications.copernicus.org:os96969 2023-05-15T14:48:15+02:00 Arctic sea level variability from high-resolution model simulations and implications for the Arctic observing system Lyu, Guokun Serra, Nuno Zhou, Meng Stammer, Detlef 2022-01-06 application/pdf https://doi.org/10.5194/os-18-51-2022 https://os.copernicus.org/articles/18/51/2022/ eng eng doi:10.5194/os-18-51-2022 https://os.copernicus.org/articles/18/51/2022/ eISSN: 1812-0792 Text 2022 ftcopernicus https://doi.org/10.5194/os-18-51-2022 2022-01-10T17:22:17Z Two high-resolution model simulations are used to investigate the spatiotemporal variability of the Arctic Ocean sea level. The model simulations reveal barotropic sea level variability at periods of < 30 d, which is strongly captured by bottom pressure observations. The seasonal sea level variability is driven by volume exchanges with the Pacific and Atlantic oceans and the redistribution of the water by the wind. Halosteric effects due to river runoff and evaporation minus precipitation ice melting/formation also contribute in the marginal seas and seasonal sea ice extent regions. In the central Arctic Ocean, especially the Canadian Basin, the decadal halosteric effect dominates sea level variability. The study confirms that satellite altimetric observations and Gravity Recovery and Climate Experiment (GRACE) could infer the total freshwater content changes in the Canadian Basin at periods longer than 1 year, but they are unable to depict the seasonal and subseasonal freshwater content changes. The increasing number of profiles seems to capture freshwater content changes since 2007, encouraging further data synthesis work with a more complicated interpolation method. Further, in situ hydrographic observations should be enhanced to reveal the freshwater budget and close the gaps between satellite altimetry and GRACE, especially in the marginal seas. Text Arctic Arctic Ocean Sea ice Copernicus Publications: E-Journals Arctic Arctic Ocean Pacific Ocean Science 18 1 51 66 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
Two high-resolution model simulations are used to investigate the spatiotemporal variability of the Arctic Ocean sea level. The model simulations reveal barotropic sea level variability at periods of < 30 d, which is strongly captured by bottom pressure observations. The seasonal sea level variability is driven by volume exchanges with the Pacific and Atlantic oceans and the redistribution of the water by the wind. Halosteric effects due to river runoff and evaporation minus precipitation ice melting/formation also contribute in the marginal seas and seasonal sea ice extent regions. In the central Arctic Ocean, especially the Canadian Basin, the decadal halosteric effect dominates sea level variability. The study confirms that satellite altimetric observations and Gravity Recovery and Climate Experiment (GRACE) could infer the total freshwater content changes in the Canadian Basin at periods longer than 1 year, but they are unable to depict the seasonal and subseasonal freshwater content changes. The increasing number of profiles seems to capture freshwater content changes since 2007, encouraging further data synthesis work with a more complicated interpolation method. Further, in situ hydrographic observations should be enhanced to reveal the freshwater budget and close the gaps between satellite altimetry and GRACE, especially in the marginal seas. |
format |
Text |
author |
Lyu, Guokun Serra, Nuno Zhou, Meng Stammer, Detlef |
spellingShingle |
Lyu, Guokun Serra, Nuno Zhou, Meng Stammer, Detlef Arctic sea level variability from high-resolution model simulations and implications for the Arctic observing system |
author_facet |
Lyu, Guokun Serra, Nuno Zhou, Meng Stammer, Detlef |
author_sort |
Lyu, Guokun |
title |
Arctic sea level variability from high-resolution model simulations and implications for the Arctic observing system |
title_short |
Arctic sea level variability from high-resolution model simulations and implications for the Arctic observing system |
title_full |
Arctic sea level variability from high-resolution model simulations and implications for the Arctic observing system |
title_fullStr |
Arctic sea level variability from high-resolution model simulations and implications for the Arctic observing system |
title_full_unstemmed |
Arctic sea level variability from high-resolution model simulations and implications for the Arctic observing system |
title_sort |
arctic sea level variability from high-resolution model simulations and implications for the arctic observing system |
publishDate |
2022 |
url |
https://doi.org/10.5194/os-18-51-2022 https://os.copernicus.org/articles/18/51/2022/ |
geographic |
Arctic Arctic Ocean Pacific |
geographic_facet |
Arctic Arctic Ocean Pacific |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
eISSN: 1812-0792 |
op_relation |
doi:10.5194/os-18-51-2022 https://os.copernicus.org/articles/18/51/2022/ |
op_doi |
https://doi.org/10.5194/os-18-51-2022 |
container_title |
Ocean Science |
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18 |
container_issue |
1 |
container_start_page |
51 |
op_container_end_page |
66 |
_version_ |
1766319336679538688 |