Studies in Ocean-Atmosphere Interaction

Neelin， J. David，加州大学洛杉矶分校题目：研究海洋-大气相互作用本研究旨在帮助理解海洋与大气相互作用产生的气候现象及其产生机制。在以前的NSF资助下开发的方法将被应用，但重点在几个领域有所改变：1)热带大气建模部分将采用一种新的方法，该方法基于一种旨在将以前资助的理论发展转化为新型非线性模型的方法。适用于某些对流条件的垂直结构的分析结果被用作更普遍有效的数值模型的基础，但在低成本的对流区域附近保持较高的精度。这与长波辐射的有效治疗相结合。更重要的是，这些模型易于分析，可以深入了解三维海洋-大气反馈的大气方面。2)海洋-大气相互作用在维持热带气候学中的作用的研究是在先前的资助下开始的，导致了“比耶克内斯假说的气候学版本”。这表明信风、海洋环流和海温梯度之间的三维反馈对海温冷暖区气候配置具有重要意义。PI将扩展这项工作，并试图弥合涉及相对海温值的假设与其他研究人员关于调节绝对海温值过程的工作之间的差距。研究热带年际变化模态是以前赠款的主要内容。这方面的理论部分仍在继续，但相对于上述主题的强调较少。相反，以前应用于热带的方法将适用于中纬度耦合变率，目的是为其他研究人员正在进行的数值模拟工作提供理论对应。这项工作很重要，因为它寻求与我们模拟和预测气候的能力相关的新知识。

Abstract ATM-9521389 Neelin, J. David University of California, Los Angeles Title: Studies in Ocean-Atmosphere Interaction This research aims to contribute to understanding climate phenomena that arise by interaction between ocean and atmosphere, and the mechanisms that produce them. Methods developed under the previous NSF grant will be applied but with a change in emphasis in several areas: 1) A new approach will be used for the tropical atmospheric modeling component, based on a method designed to parlay theoretical developments from the previous grant into a new type of nonlinear model. Analytical results for vertical structure that apply under certain convective conditions are used as a basis for numerical models that are valid more generally, but retain high accuracy for low cost near convection regions. This is combined with an efficient treatment of long-wave radiation. More importantly, the models are easy to analyze for insight into the atmospheric side of three-dimensional ocean-atmosphere feedbacks. 2) Investigations into the role of ocean-atmosphere interaction in maintaining the tropical climatology were begun under the previous grant leading to the "climatological version of the Bjerknes hypothesis". This suggest that three-dimensional feedback between trade winds, ocean circulation and gradients of sea surface temperature (SST) are important to the climatological configuration of warm and cold SST regions. The PI will expand this work and attempt to bridge the gap between this hypothesis involving relative SST values and work by other investigators on the processes regulating absolute SST values. 3) Work on modes of tropical interannual variability was a mainstay of the previous grant. The theoretical component of this continues but with less emphasis relative to the above topics. Instead method applied previously to the tropics are to be adapted for midlatitude coupled variability, with the aim of providing a the oretical counterpart for numerical modeling efforts underway by other investigators. This work is important because it seeks new knowledge relevant to our ability to model and predict climate.