Dynamics of Tropical Intraseasonal Oscillation

这项研究的目的是提高我们的 对有关机制的某些方面的了解 热带季节内振荡 复杂动态 框架将被简化为一组易于处理的模型， 可以分别用解析法或准解析法求解， 解析模型和数值计算。 调查将 重点研究（1）赤道Kelvin和Rossby之间的耦合 波和内部垂直模态之间通过湿过程; (2)边界层质量和水汽辐合的作用 低频波的动力学;（3） 非线性与线性加热表示;（4）的原因， 区域性和季节性的向北相位传播;以及（5） 在季节内时间尺度上海气相互作用的性质 以及这种相互作用对热带低频的影响 变化. 这项研究很重要，因为它试图了解 物理机制负责一个小但重要的 热带地区观测到的气候变率的一部分; 可作为较大振幅的触发器的可变性 气候变率

The objective of this proposed research is to improve our understanding of certain aspects of the mechanisms responsible for tropical intraseasonal oscillation. The complex dynamic framework will be reduced to a group of tractable models that can be solved separately either by analytic means or by use of quasi- analytic model and numerical computation. The investigation will focus on (1) the couplings between equatorial Kelvin and Rossby waves and among internal vertical modes through moist processes; (2) the roles of boundary layer mass and moisture convergence in the dynamics of the low frequency wave; (3) the consequences of nonlinear versus linear heating representation; (4) the causes of regionally and seasonally northward phase propagation; and (5) the nature of air-sea interaction in the intraseasonal time scale and the impact of this interaction on tropical low frequency variations. This research is important because it seeks to understand the physical mechanisms responsible for a small but significant portion of the observed climate variability in the tropics; variability which may act as a trigger for larger amplitude climate variability.