Dissolved Oxygen Recovery in the Oxygen Minimum Zone of the Arabian Sea in Recent Decade as Observed by BGC‐Argo Floats
Abstract The Arabian Sea (AS) hosts the world's thickest and most intense oxygen minimum zone (OMZ), and previous studies have documented a dramatic decline of dissolved oxygen (DO) in the northeastern AS in recent decades. In this study, using the recently released data from Biogeochemical‐Arg...
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| Format: | Article |
| Language: | English |
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Wiley
2024-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL108841 |
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| author | Tongtong Liu Yun Qiu Xinyu Lin Xutao Ni Lei Wang Hongliang Li Chunsheng Jing |
| author_facet | Tongtong Liu Yun Qiu Xinyu Lin Xutao Ni Lei Wang Hongliang Li Chunsheng Jing |
| author_sort | Tongtong Liu |
| collection | DOAJ |
| description | Abstract The Arabian Sea (AS) hosts the world's thickest and most intense oxygen minimum zone (OMZ), and previous studies have documented a dramatic decline of dissolved oxygen (DO) in the northeastern AS in recent decades. In this study, using the recently released data from Biogeochemical‐Argo floats, we found a surprising trend of recovery in deoxygenation within the core region of the OMZ in the AS (ASOMZ) since 2013. The average DO concentration increased by approximately threefold, from ∼0.63 μM in 2013 to ∼1.68 μM in 2022, and the thickness of the ASOMZ decreased by 13%. We find that the weakening of Oman upwelling resulting from the weakening of the summer monsoon is the main driver of oxygenation in the ASOMZ. In addition, the reduction of primary production linked to warming‐driven stratification reinforces deoxygenation recovery at depth. |
| format | Article |
| id | doaj-art-b631713d667e46ea93aebd48be795b26 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-b631713d667e46ea93aebd48be795b262025-08-20T02:31:38ZengWileyGeophysical Research Letters0094-82761944-80072024-06-015112n/an/a10.1029/2024GL108841Dissolved Oxygen Recovery in the Oxygen Minimum Zone of the Arabian Sea in Recent Decade as Observed by BGC‐Argo FloatsTongtong Liu0Yun Qiu1Xinyu Lin2Xutao Ni3Lei Wang4Hongliang Li5Chunsheng Jing6Fujian Provincial Key Laboratory of Marine Physical and Geological Processes Third Institute of Oceanography Ministry of Natural Resources Xiamen ChinaFujian Provincial Key Laboratory of Marine Physical and Geological Processes Third Institute of Oceanography Ministry of Natural Resources Xiamen ChinaFujian Provincial Key Laboratory of Marine Physical and Geological Processes Third Institute of Oceanography Ministry of Natural Resources Xiamen ChinaFujian Provincial Key Laboratory of Marine Physical and Geological Processes Third Institute of Oceanography Ministry of Natural Resources Xiamen ChinaFujian Provincial Key Laboratory of Marine Physical and Geological Processes Third Institute of Oceanography Ministry of Natural Resources Xiamen ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai ChinaFujian Provincial Key Laboratory of Marine Physical and Geological Processes Third Institute of Oceanography Ministry of Natural Resources Xiamen ChinaAbstract The Arabian Sea (AS) hosts the world's thickest and most intense oxygen minimum zone (OMZ), and previous studies have documented a dramatic decline of dissolved oxygen (DO) in the northeastern AS in recent decades. In this study, using the recently released data from Biogeochemical‐Argo floats, we found a surprising trend of recovery in deoxygenation within the core region of the OMZ in the AS (ASOMZ) since 2013. The average DO concentration increased by approximately threefold, from ∼0.63 μM in 2013 to ∼1.68 μM in 2022, and the thickness of the ASOMZ decreased by 13%. We find that the weakening of Oman upwelling resulting from the weakening of the summer monsoon is the main driver of oxygenation in the ASOMZ. In addition, the reduction of primary production linked to warming‐driven stratification reinforces deoxygenation recovery at depth.https://doi.org/10.1029/2024GL108841the Arabian Seaoxygen minimum zoneupwellingsouthwestern monsoondeoxygenation |
| spellingShingle | Tongtong Liu Yun Qiu Xinyu Lin Xutao Ni Lei Wang Hongliang Li Chunsheng Jing Dissolved Oxygen Recovery in the Oxygen Minimum Zone of the Arabian Sea in Recent Decade as Observed by BGC‐Argo Floats Geophysical Research Letters the Arabian Sea oxygen minimum zone upwelling southwestern monsoon deoxygenation |
| title | Dissolved Oxygen Recovery in the Oxygen Minimum Zone of the Arabian Sea in Recent Decade as Observed by BGC‐Argo Floats |
| title_full | Dissolved Oxygen Recovery in the Oxygen Minimum Zone of the Arabian Sea in Recent Decade as Observed by BGC‐Argo Floats |
| title_fullStr | Dissolved Oxygen Recovery in the Oxygen Minimum Zone of the Arabian Sea in Recent Decade as Observed by BGC‐Argo Floats |
| title_full_unstemmed | Dissolved Oxygen Recovery in the Oxygen Minimum Zone of the Arabian Sea in Recent Decade as Observed by BGC‐Argo Floats |
| title_short | Dissolved Oxygen Recovery in the Oxygen Minimum Zone of the Arabian Sea in Recent Decade as Observed by BGC‐Argo Floats |
| title_sort | dissolved oxygen recovery in the oxygen minimum zone of the arabian sea in recent decade as observed by bgc argo floats |
| topic | the Arabian Sea oxygen minimum zone upwelling southwestern monsoon deoxygenation |
| url | https://doi.org/10.1029/2024GL108841 |
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