LICOM模拟的南海贯穿流及其对南海上层热含量的影响

王伟文; 俞永强; 李超; 周文; 刘钦燕; 王东晓

LICOM模拟的南海贯穿流及其对南海上层热含量的影响

1.
中国科学院南海海洋研究所热带海洋环境动力学重点实验室(LED),广东广州 510301;中国科学院研究生院,北京 100049
2.
中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室(LASG),北京 100029
3.
中国科学院南海海洋研究所热带海洋环境动力学重点实验室(LED),广东广州 510301
4.
香港城市大学能源及环境学院佳达亚太气候研究中心,香港

基金项目: 中国科学院知识创新工程项目(KZCX2-YW-214);国家自然科学基金(40806005);中国科学院南海海洋研究所青年基金(SQ200814)。

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出版历程
- 收稿日期: 2009-12-11
- 修回日期: 2010-04-20

An investigation of the South China Sea throughflow and its impact on upper layer heat content of the South China Sea using LICOM

1.
Key Laboratory of Tropical Marine Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China;Graduate School, Chinese Academy of Sciences, Beijing 100049,China
2.
State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
3.
Key Laboratory of Tropical Marine Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
4.
Guy Carpenter Asia-Pacific Climate Impact Centre, School of Energy and Environment, City University of Hong Kong, Hong Kong, China

摘要

摘要: 利用SODA(Simple Ocean Data Assimilation)数据、XBT(Expendable Bathythermograph)观测数据和绕岛环流理论(island rule)诊断计算结果评估了一个涡相容(eddy-permitting)全球海洋环流模式——LICOM对南海贯穿流及南海上层热含量的模拟能力,同时利用模式输出探讨了南海贯穿流对南海上层热含量的影响。NEC(North Equatorial Current)分叉的垂向结构、南海内区环流的季节和吕宋海峡体积输送的年际变化等分析结果都表明,LICOM能获取西北太平洋-印尼海域环流和南海贯穿流的合理模拟结果。模式模拟的南海上层热含量季节变化与观测及同化数据都表现出良好的一致性,尤其在南海内区。相关分析表明,吕宋海峡热输送主要控制着南海内区上层的热含量变化,两者呈显著负相关,这进一步证实了南海贯穿流作为一支冷平流调制着南海上层热含量变化的重要事实。
- 南海贯穿流 /
- 涡相容全球海洋环流模式 /
- 热含量 /
- 体积输送
Abstract: The simulation of an eddy-permitting global oceanic general circulation model (OGCM) on the South China Sea throughflow (SCSTF) and upper layer heat content of the South China Sea (SCS) is evaluated by using island rule, Simple Ocean Data Assimilation (SODA) and Expendable Bathythermograph (XBT) data. The impact of the SCSTF on upper layer heat content of the SCS is also investigated. Analysis of vertical structure of North Equatorial Current (NEC) bifurcation, seasonal variability of the SCS circulation pattern and interannual variability of Luzon Strait transport (LST) indicate that LICOM can obtain a reasonable modeling result of the SCSTF and circulation in the Indo-Pacific region. Annual mean and seasonal variability of upper layer heat content of the SCS in the model are consistent with those calculated from SODA and XBT, particularly in the inner area of the SCS. In addition, correlation analysis show that there is significant negative correlation between the LST and the SCS upper layer heat content, which further confirms the observational truth that the SCSTF acts as a cold advection in adjusting the upper layer heat content of the SCS.
- South China Sea throughflow (SCSTF) /
- eddy-permitting OGCM /
- heat content /
- volume transport

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