Multi-scale variability of the tropical Indian Ocean circulation system revealed by recent observations
Multi-scale variability of the tropical Indian Ocean circulation system revealed by recent observations
复制标题
最近的观测揭示了热带印度洋环流系统的多尺度变化
DOI：
10.1007/s11430-017-9179-x
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发表时间：
2018-04
期刊：
影响因子：
--
通讯作者：
Chen Gengxin
中科院分区：
文献类型：
--
作者：
Huang Ke;Wang Dongxiao;Wang Weiqiang;Xie Qiang;Chen Ju;Chen Lingfang;Chen Gengxin
热带印度洋环流系统包括赤道和近赤道环流、边缘海环流和涡旋。这些环流系统的动力过程显示出与印度洋季风和印度洋偶极子相关的显著的多尺度变化。综述了中国科学院南海海洋研究所近年来基于大尺度水文观测和数值模拟的热带印度洋环流系统研究进展。结果表明：（1）风驱动的Kelvin波、Rossby波和东边界反射的Rossby波控制着赤道潜流和赤道中间流的形成和演变，（2）赤道风驱动的动力是控制东印度洋上升流温跃层年际变化的主要因素;（3）赤道波以沿岸Kelvin波和反射自由Rossby波的形式向孟加拉湾输送大量能量。热带印度洋内的几个悬而未决的问题进行了讨论：（i）的动量平衡和盆地共振的赤道环流系统的变化的潜在影响，及（ii）风驱动的动力学的生命周期的东印度洋上升流的潜在贡献。本文还简要介绍了SCSIO的国际印度洋调查项目，该项目将推进热带印度洋环流系统多尺度变率的研究，为海上丝绸之路周边国家的海洋环境安全提供理论和数据依据。
The tropical Indian Ocean circulation system includes the equatorial and near-equatorial circulations, the marginal sea circulation, and eddies. The dynamic processes of these circulation systems show significant multi-scale variability associated with the Indian Monsoon and the Indian Ocean dipole. This paper summarizes the research progress over recent years on the tropical Indian Ocean circulation system based on the large-scale hydrological observations and numerical simulations by the South China Sea Institute of Oceanology (SCSIO), Chinese Academy of Sciences. Results show that: (1) the wind-driven Kelvin and Rossby waves and eastern boundary-reflected Rossby waves regulate the formation and evolution of the Equatorial Undercurrent and the Equatorial Intermediate Current; (2) the equatorial wind-driven dynamics are the main factor controlling the inter-annual variability of the thermocline in the eastern Indian Ocean upwelling; (3) the equatorial waves transport large amounts of energy into the Bay of Bengal in forms of coastal Kelvin and reflected free Rossby waves. Several unresolved issues within the tropical Indian Ocean are discussed: (i) the potential effects of the momentum balance and the basin resonance on the variability of the equatorial circulation system, and (ii) the potential contribution of wind-driven dynamics to the life cycle of the eastern Indian Ocean upwelling. This paper also briefly introduces the international Indian Ocean investigation project of the SCSIO, which will advance the study of the multi-scale variability of the tropical Indian Ocean circulation system, and provide a theoretical and data basis to support marine environmental security for the countries around the Maritime Silk Road.
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