Variations of SST and thermocline depth in the tropical Indian Ocean during Indian Ocean Dipole events
Variations of SST and thermocline depth in the tropical Indian Ocean during Indian Ocean Dipole events
复制标题
DOI：
10.1007/s11802-010-0129-2
复制
发表时间：
2010-04
影响因子：
1.6
通讯作者：
Shuangwen Sun;J. Lan;Yi Wang
中科院分区：
文献类型：
--
作者：
Shuangwen Sun;J. Lan;Yi Wang
利用HadISST和SODA数据集研究了热带印度洋表层和次表层的年际变化。风和热通量数据被用来讨论这些变化的机制。我们的研究结果表明，在印度洋偶极子（IOD）事件的热带印度洋的表面和次表层的变化是显着不同的。东极的一个显着特征是降温过程后SSTA反弹，但次表层不会发生这种情况。在西极，地表异常比地下异常持续时间长。次表层异常与ENSO有较强的相关性，而表层异常与ENSO的相关性较弱。两极地下异常呈负相关，表层异常呈正相关。风场和地表热通量的分析表明，温跃层深度的变化主要由风应力场决定，而热通量对SST的影响也很重要。
Interannual variations in the surface and subsurface tropical Indian Ocean were studied using HadISST and SODA datasets. Wind and heat flux datasets were used to discuss the mechanisms for these variations. Our results indicate that the surface and subsurface variations of the tropical Indian Ocean during Indian Ocean Dipole (IOD) events are significantly different. A prominent characteristic of the eastern pole is the SSTA rebound after a cooling process, which does not take place at the subsurface layer. In the western pole, the surface anomalies last longer than the subsurface anomalies. The subsurface anomalies are strongly correlated with ENSO, while the relationship between the surface anomalies and ENSO is much weaker. And the subsurface anomalies of the two poles are negatively correlated while they are positively correlated at the surface layer. The wind and surface heat flux analysis suggests that the thermocline depth variations are mainly determined by wind stress fields, while the heat flux effect is important on SST.