Characteristics of Physical and Biochemical Parameters within Mesoscale Eddies in the Southern Ocean
Using satellite sea surface temperature (SST) and chlorophyll- a (Chl- a ) as well as observation‑based reconstruction of dissolved inorganic carbon (DIC) and partial pressure of CO 2 ( p CO 2 ) from 1996 to 2015, we analyzed the composite patterns of physical and biochemical variables over eddies i...
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ftcopernicus:oai:publications.copernicus.org:bgd109733 2023-05-15T18:25:04+02:00 Characteristics of Physical and Biochemical Parameters within Mesoscale Eddies in the Southern Ocean Liu, Qian Liu, Yingjie Li, Xiaofeng 2023-03-15 application/pdf https://doi.org/10.5194/bg-2023-39 https://bg.copernicus.org/preprints/bg-2023-39/ eng eng doi:10.5194/bg-2023-39 https://bg.copernicus.org/preprints/bg-2023-39/ eISSN: 1726-4189 Text 2023 ftcopernicus https://doi.org/10.5194/bg-2023-39 2023-03-20T17:23:10Z Using satellite sea surface temperature (SST) and chlorophyll- a (Chl- a ) as well as observation‑based reconstruction of dissolved inorganic carbon (DIC) and partial pressure of CO 2 ( p CO 2 ) from 1996 to 2015, we analyzed the composite patterns of physical and biochemical variables over eddies in the Southern Ocean (SO). Interestingly, eddy modulation of p CO 2 has marked seasonal and regional variations. The DIC effect dominates the p CO 2 anomalies in winter. In summer, the p CO 2 anomalies within eddies are dominated by DIC (SST) anomalies in regions with larger (smaller) magnitudes of DIC anomalies. In addition, about 1/4 of eddies are observed to be abnormal (cold anticyclonic and warm cyclonic eddies) in the SO, which show opposite SST signatures contrary to normal eddies (warm anticyclonic and cold cyclonic eddies). The modification of abnormal eddies to physical and biochemical parameters is non-negligible and differs from normal eddies due to the common effects of eddy pumping and eddy-induced Ekman pumping. For example, DIC anomalies in normal and abnormal eddies show dipole patterns with opposite signals. Besides, the contributions of abnormal eddies to p CO 2 are about 2.7 times higher than normal eddies in regions where abnormal eddies dominate. However, Chl- a anomalies in normal and abnormal eddies show similar patterns with the same signals since they are dominated by eddy stirring and pumping. Text Southern Ocean Copernicus Publications: E-Journals Southern Ocean |
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Copernicus Publications: E-Journals |
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English |
description |
Using satellite sea surface temperature (SST) and chlorophyll- a (Chl- a ) as well as observation‑based reconstruction of dissolved inorganic carbon (DIC) and partial pressure of CO 2 ( p CO 2 ) from 1996 to 2015, we analyzed the composite patterns of physical and biochemical variables over eddies in the Southern Ocean (SO). Interestingly, eddy modulation of p CO 2 has marked seasonal and regional variations. The DIC effect dominates the p CO 2 anomalies in winter. In summer, the p CO 2 anomalies within eddies are dominated by DIC (SST) anomalies in regions with larger (smaller) magnitudes of DIC anomalies. In addition, about 1/4 of eddies are observed to be abnormal (cold anticyclonic and warm cyclonic eddies) in the SO, which show opposite SST signatures contrary to normal eddies (warm anticyclonic and cold cyclonic eddies). The modification of abnormal eddies to physical and biochemical parameters is non-negligible and differs from normal eddies due to the common effects of eddy pumping and eddy-induced Ekman pumping. For example, DIC anomalies in normal and abnormal eddies show dipole patterns with opposite signals. Besides, the contributions of abnormal eddies to p CO 2 are about 2.7 times higher than normal eddies in regions where abnormal eddies dominate. However, Chl- a anomalies in normal and abnormal eddies show similar patterns with the same signals since they are dominated by eddy stirring and pumping. |
format |
Text |
author |
Liu, Qian Liu, Yingjie Li, Xiaofeng |
spellingShingle |
Liu, Qian Liu, Yingjie Li, Xiaofeng Characteristics of Physical and Biochemical Parameters within Mesoscale Eddies in the Southern Ocean |
author_facet |
Liu, Qian Liu, Yingjie Li, Xiaofeng |
author_sort |
Liu, Qian |
title |
Characteristics of Physical and Biochemical Parameters within Mesoscale Eddies in the Southern Ocean |
title_short |
Characteristics of Physical and Biochemical Parameters within Mesoscale Eddies in the Southern Ocean |
title_full |
Characteristics of Physical and Biochemical Parameters within Mesoscale Eddies in the Southern Ocean |
title_fullStr |
Characteristics of Physical and Biochemical Parameters within Mesoscale Eddies in the Southern Ocean |
title_full_unstemmed |
Characteristics of Physical and Biochemical Parameters within Mesoscale Eddies in the Southern Ocean |
title_sort |
characteristics of physical and biochemical parameters within mesoscale eddies in the southern ocean |
publishDate |
2023 |
url |
https://doi.org/10.5194/bg-2023-39 https://bg.copernicus.org/preprints/bg-2023-39/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-2023-39 https://bg.copernicus.org/preprints/bg-2023-39/ |
op_doi |
https://doi.org/10.5194/bg-2023-39 |
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1766206243644375040 |