Studies in Ocean-Land-Atmosphere Interaction

这项拟议的工作旨在了解海洋、陆地表面和大气之间的相互作用所产生的气候现象。PI和HIS小组在以前国家科学基金会的支持下开发的方法将应用于四个相关领域：(1)热带遥相关和海洋-陆地-大气相互作用。海洋影响陆地区域的大气遥相关通常发生在对流区内，或对流区的移动或调制。将采用分层模式方法分析热带遥相关中的对流、云辐射和陆面反馈以及热带陆地对流区的相关现象。(Ii)中间层大气-陆地模式。该小组开发的中间模型将保持不变，以支持加州大学洛杉矶分校和其他机构的研究。它将被用作测试一些非标准模拟方法的平台(III)随机对流参数化。传统的对流参数化方案对小尺度对流运动的平均效应进行了参数化处理，但忽略了方差。将探索一种将其包括在内的方法，并将测试其对大范围运动的影响。(4)海洋-大气相互作用。关于ENSO的继续工作旨在为与主要振荡模式无关的实质性变化提供理论原型。此外，还提出了关于全球变暖的热带太平洋信号的工作，该信号具有一些与厄尔尼诺现象相同的特征。这项工作很重要，因为它将增加我们对海洋、陆地和大气在气候系统中作用的理解。

The proposed work aims to understand climate phenomena that arise by interactions between the ocean, land surface and atmosphere. Methods developed by the PI and his group under previous NSF support will be applied to four related areas:(i) Tropical teleconnections and ocean-land-atmosphere interaction. Atmospheric teleconnections by which oceans influence land regions often occur within convective zones, or shifts or modulation of convective zones. Hierarchical modeling methods will be applied to analyze convective, cloud-radiative and land-surface feedbacks that occur in tropical teleconnections and related phenomena in tropical land convective regions.(ii) Intermediate atmosphere-land modeling. The intermediate model developed by the group will be maintained in support of research at UCLA and other institutions. It will be used as a platform for testing some non-standard modeling approaches(iii) Stochastic convective parameterization. Conventional convective parameterizations parameterize the mean effects of small-scale convective motions but omit the variance. A method for including this is to be explored and the impacts of this on large-scale motions will be tested.(iv) Ocean atmosphere interaction. Continuation of work on ENSO aims to provide theoretical prototypes for the substantial variability that is not associated with the leading oscillatory mode. Work is also proposed on the tropical Pacific signal of global warming that has some features in common with El Nino.The work is important because it will increase our understanding of the role of ocean, land and atmosphere in the climate system.