Heat and salinity transport between the permanent pycnocline and the mixed layer due to the obduction process evaluated from a gridded Argo dataset
Abstract It is necessary for air–sea interaction and climate research to evaluate heat and salinity transport between the mixed layer (ML) and the permanent pycnocline and its contribution to the ML properties. The authors have calculated the obduction and subduction rates with the Eulerian definiti...
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Springer Science and Business Media LLC
2020
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crspringernat:10.1007/s10872-020-00559-1 2023-05-15T17:35:04+02:00 Heat and salinity transport between the permanent pycnocline and the mixed layer due to the obduction process evaluated from a gridded Argo dataset Kawai, Yoshimi Hosoda, Shigeki Uehara, Kazuyuki Suga, Toshio Ministry of Education, Culture, Sports, Science and Technology Japan Society for the Promotion of Science 2020 http://dx.doi.org/10.1007/s10872-020-00559-1 https://link.springer.com/content/pdf/10.1007/s10872-020-00559-1.pdf https://link.springer.com/article/10.1007/s10872-020-00559-1/fulltext.html en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Journal of Oceanography volume 77, issue 1, page 75-92 ISSN 0916-8370 1573-868X Oceanography journal-article 2020 crspringernat https://doi.org/10.1007/s10872-020-00559-1 2022-01-04T14:25:35Z Abstract It is necessary for air–sea interaction and climate research to evaluate heat and salinity transport between the mixed layer (ML) and the permanent pycnocline and its contribution to the ML properties. The authors have calculated the obduction and subduction rates with the Eulerian definition using a 1°-grid Argo dataset and incorporated the obduction rate into the ML budget analysis in order to assess the impact of the entrained permanent pycnocline water on the ML temperature and salinity. They have successfully separated the effect of obduction on the ML from the entrainment of the seasonal pycnocline, and specified the regions where the obduction impact is noticeable. The ML heating rate due to obduction was smaller than ± 0.1 K/yr on average over most of the domain, but it was larger than − 0.5 K/yr in places around the Circumpolar Current, in the northeastern tropical Pacific, the southwestern tropical Indian Ocean, and the northeastern North Atlantic. The salinizing rate due to obduction exceeded ± 0.02 psu/yr in these areas, and in the subarctic North Pacific and the eastern South Pacific. The waters entrained from the permanent pycnocline warm and salinize the ML in the high latitudes due to the dichothermal structure. The method applied in this study also enabled us to assess the residence time and route of obducted and subducted water parcels below the ML. Furthermore, the authors examined the changes of obduction and subduction related with the marine heatwave that occurred in the northeastern North Pacific around 2014. Article in Journal/Newspaper North Atlantic Subarctic Springer Nature (via Crossref) Indian Pacific Journal of Oceanography 77 1 75 92 |
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Open Polar |
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Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
Oceanography |
spellingShingle |
Oceanography Kawai, Yoshimi Hosoda, Shigeki Uehara, Kazuyuki Suga, Toshio Heat and salinity transport between the permanent pycnocline and the mixed layer due to the obduction process evaluated from a gridded Argo dataset |
topic_facet |
Oceanography |
description |
Abstract It is necessary for air–sea interaction and climate research to evaluate heat and salinity transport between the mixed layer (ML) and the permanent pycnocline and its contribution to the ML properties. The authors have calculated the obduction and subduction rates with the Eulerian definition using a 1°-grid Argo dataset and incorporated the obduction rate into the ML budget analysis in order to assess the impact of the entrained permanent pycnocline water on the ML temperature and salinity. They have successfully separated the effect of obduction on the ML from the entrainment of the seasonal pycnocline, and specified the regions where the obduction impact is noticeable. The ML heating rate due to obduction was smaller than ± 0.1 K/yr on average over most of the domain, but it was larger than − 0.5 K/yr in places around the Circumpolar Current, in the northeastern tropical Pacific, the southwestern tropical Indian Ocean, and the northeastern North Atlantic. The salinizing rate due to obduction exceeded ± 0.02 psu/yr in these areas, and in the subarctic North Pacific and the eastern South Pacific. The waters entrained from the permanent pycnocline warm and salinize the ML in the high latitudes due to the dichothermal structure. The method applied in this study also enabled us to assess the residence time and route of obducted and subducted water parcels below the ML. Furthermore, the authors examined the changes of obduction and subduction related with the marine heatwave that occurred in the northeastern North Pacific around 2014. |
author2 |
Ministry of Education, Culture, Sports, Science and Technology Japan Society for the Promotion of Science |
format |
Article in Journal/Newspaper |
author |
Kawai, Yoshimi Hosoda, Shigeki Uehara, Kazuyuki Suga, Toshio |
author_facet |
Kawai, Yoshimi Hosoda, Shigeki Uehara, Kazuyuki Suga, Toshio |
author_sort |
Kawai, Yoshimi |
title |
Heat and salinity transport between the permanent pycnocline and the mixed layer due to the obduction process evaluated from a gridded Argo dataset |
title_short |
Heat and salinity transport between the permanent pycnocline and the mixed layer due to the obduction process evaluated from a gridded Argo dataset |
title_full |
Heat and salinity transport between the permanent pycnocline and the mixed layer due to the obduction process evaluated from a gridded Argo dataset |
title_fullStr |
Heat and salinity transport between the permanent pycnocline and the mixed layer due to the obduction process evaluated from a gridded Argo dataset |
title_full_unstemmed |
Heat and salinity transport between the permanent pycnocline and the mixed layer due to the obduction process evaluated from a gridded Argo dataset |
title_sort |
heat and salinity transport between the permanent pycnocline and the mixed layer due to the obduction process evaluated from a gridded argo dataset |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
http://dx.doi.org/10.1007/s10872-020-00559-1 https://link.springer.com/content/pdf/10.1007/s10872-020-00559-1.pdf https://link.springer.com/article/10.1007/s10872-020-00559-1/fulltext.html |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
North Atlantic Subarctic |
genre_facet |
North Atlantic Subarctic |
op_source |
Journal of Oceanography volume 77, issue 1, page 75-92 ISSN 0916-8370 1573-868X |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s10872-020-00559-1 |
container_title |
Journal of Oceanography |
container_volume |
77 |
container_issue |
1 |
container_start_page |
75 |
op_container_end_page |
92 |
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1766134097745281024 |