Variability of Tropical Indian Ocean Induced by Intraseasonal Atmospheric Forcing

该项目的目标是：确定热带印度洋在季节内大气强迫作用下的变率；了解这种变化的动力学和热力学；研究大气季内强迫对海洋季节变率和印度洋纬向模态的影响。其主要动机是印度洋洋流、混合层深度和上层海洋温度存在较大的季节性波动。人们希望更好地理解所涉及的过程将有助于揭示有关区域气候是如何决定的一些问题。国家大气研究中心气候系统模型的海洋部分将进行数值模拟。通过对印度洋对具有和不具有季节内变率的准现实强迫的响应的比较诊断研究，将确定响应的性质及其过程。数值解也将与JASMINE和WOCE现场实验的数据进行比较。

0136836/HanThe goals of this project are: to determine the variability of the tropical Indian Ocean forced by intraseasonal atmospheric forcing; to understand the dynamics and thermodynamics of such variability; and to examine the impact of atmospheric intraseasonal forcing on oceanic seasonal variability and the Indian Ocean Zonal Mode. The primary motivation is the presence of large intraseasonal fluctuations in currents, mixed layer depth and upper ocean temperature in the Indian Ocean. It is hoped that a better understanding of the processes involved will be useful for unraveling some of the questions about how regional climate is determined.Numerical simulations will be made with the ocean component of the National Center for Atmospheric Rresearch's climate system model. From a diagnostic study of the comparison of the response of the Indian Ocean to quasi-realistic forcing with and without intraseasonal variability, the nature of the response, and the processes responsible for it, will be determined. Numerical solutions will also be compared to data from the JASMINE and WOCE field experiments.