Presentation Details
Assessment of Antarctic Bottom Water in Observation, Reanalysis, and CMIP6 Models
ID：145
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Updated Time：2025-11-06 17:10:49 Hits：153
Oral Presentation
Start Time：Pending（Asia/Shanghai）
Duration：Pending
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Abstract
Antarctic Bottom Water (AABW), a key component of the global meridional overturning circulation, is formed in distinct source regions around Antarctica. However, many studies treat AABW as a homogeneous water mass, potentially overlooking significant regional variations. This study uses a classification scheme to delineate AABW into three subtypes based on their source regions: Weddell Sea-originated AABW (WS-AABW), Ross Sea-originated AABW (RS-AABW), and Adélie Land-originated AABW (ADL-AABW). The definition combines salinity and neutral density, building upon in-situ observations. We then assess the capability of multiple datasets—including World Ocean Atlas 2023 (WOA23), an ensemble ocean reanalysis product (GLOBAL_MULTIYEAR_PHY_ENS_001_031), and outputs from 16 CMIP6 models—to exhibit spatial distribution and properties of these AABW subtypes. The results show that WOA23 provides a climatological representation of all three AABW subtypes. The ensemble reanalysis product also performs well compared to WOA23, albeit with an overestimation of ADL-AABW. Almost all CMIP6 models cannot simulate the three types of AABW, but some models can reflect them after bias correction.
Keywords
Antarctic Bottom Water, classification, CMIP6 models.
Speaker
Siran Chen
Student Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)；School of Atmospheric Sciences, Sun Yat-sen UniversitySubmission Author
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Important Date
-
Conference Date
Nov 20
2025
toNov 24
2025
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Nov 10 2025
Draft paper submission deadline
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Nov 24 2025
Registration deadline
Sponsored By
The Pacific Science Association
Organized By
Shantou University
Xiamen University
Xiamen University
Contact Information
- Prof. Ping Li
- ps******@stu.edu.cn
- 86-*********
Previous Conferences
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2015-11-02 Iran, Islamic Republic of
2015 30th International Power System Conference (PSC)
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