Three Dimensional Modeling of Dynamical Interactions With Convective, Radiative, and Surface Fluxes Over the Tropical Pacific

ATM-9319461 Seager，R.Zebiak，Stephen E.哥伦比亚大学标题：热带太平洋对流、辐射和地面通量之间动力相互作用的三维模拟这个项目将研究太平洋地区对流、辐射和地面通量之间的相互作用，重点是西太平洋。PIS将使用新开发的、高效和准确的全球线性原始方程模式，以及湿对流、辐射传输和边界层过程的参数化。这项工作的最终目标是改进这些过程的模式表示，以便改进对大尺度变量(特别是近地表属性)的模式模拟，这些变量是在几个月到几十年的时间尺度上模拟和预测气候变化的持续进展所必需的。因此，模型物理的验证将基于对TOGA COARE区域内这些过程的观测，以及它们对大尺度环流模拟的影响。PIS特别感兴趣的是能够对观测到的有限规模的对流和对流异常进行建模，其中的误差目前在模拟的地面风中造成了很大的误差。这项工作将通过观测到的海温强迫进行实验，并通过研究辐射通量、对流通量和地表通量在确定传播对流扰动的性质和组织方面的作用。这项工作的另一个重点将是西太平洋的地表能源收支。PIS将致力于将大气模拟工作得出的通量及其组成部分的估计数与海洋SST模拟得出的其他估计数以及TOGA COARE数据进行调和。将分析对流、辐射和边界层过程在确定表面通量方面的各种作用。这项研究之所以重要，是因为它试图澄清对理解气候变异性很重要过程。它是由TOGA COARE计划资助的。

Abstract ATM-9319461 Seager, R. Zebiak, Stephen E. Columbia University Title: Three Dimensional Modeling of Dynamical Interactions with Convective, Radiative and Surface Fluxes Over the Tropical Pacific This project will concern the interaction between the convective, radiative and surface fluxes over the Pacific sector with an emphasis on the west Pacific. The PIs will use a newly developed, efficient and accurate, global, linear primitive equation model together with parameterizations of moist convection, radiative transfer and boundary layer processes. The ultimate goal of the work is to improve model representation of these processes in order to improve model simulations of the large scale variables (especially near surface properties) necessary for continued progress in simulation and prediction of climate variability on time scales of months to decades. Verification of model physics will hence be based on observations of these processes within the TOGA COARE domain and also on their effect on simulation of the large scale circulation. The PIs are especially interested in being able to model the observed limited scale of convection and convective anomalies, errors in which currently create large errors in modelled surface winds. This work will proceed through experiments with observed SST forcing and through studies of the role of the radiative, convection and surface fluxes in determination of the character and organization of propagating convective disturbances. Another focus of the work will be on the surface energy budget of the west Pacific. The PIs will aim to reconcile estimates of the flux, and its components, derived from the atmospheric modeling work with other estimates derived from ocean SST modeling and with the TOGA COARE data. The various roles of convection, radiation and boundary layer processes in determining the surface flux will be analyzed. This research is important because it seeks to clarify proces ses important for understanding climate variability. It is funded under the TOGA COARE program.