Dissolved Oxygen Recovery in the Oxygen Minimum Zone of the Arabian Sea in Recent Decade as Observed by BGC‐Argo Floats-Reference-Cited by-同舟云学术

Dissolved Oxygen Recovery in the Oxygen Minimum Zone of the Arabian Sea in Recent Decade as Observed by BGC‐Argo Floats

Published:2024-06-14 Issue:12 Volume:51 Page:
ISSN:0094-8276
Container-title:Geophysical Research Letters
language:en
Short-container-title:Geophysical Research Letters

Author:

Liu Tongtong¹^ORCID,Qiu Yun¹²³^ORCID,Lin Xinyu¹^ORCID,Ni Xutao¹,Wang Lei¹^ORCID,Li Hongliang³⁴⁵^ORCID,Jing Chunsheng¹

Affiliation:

1. Fujian Provincial Key Laboratory of Marine Physical and Geological Processes Third Institute of Oceanography Ministry of Natural Resources Xiamen China

2. Laboratory for Regional Oceanography and Numerical Modeling Qingdao Marine Science and Technology Center Qingdao China

3. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai China

4. Key Laboratory of Marine Ecosystem Dynamics Second Institute of Oceanography Ministry of Natural Resources Hangzhou China

5. Observation and Research Station of Yangtze River Delta Marine Ecosystems Ministry of Natural Resources Zhoushan China

Abstract

AbstractThe 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.

Funder

Ministry of Natural Resources of the People's Republic of China

Publisher

American Geophysical Union (AGU)

Link

https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2024GL108841

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