Effects of Surface Conditions on Tropical Precipitation

这项研究的目的是为我们的 了解如何建立降水分布 飞越非洲和南美洲。 调查将在 通过比较不同程度的气候模型， 复杂性 分析将侧重于了解热带 大气动力学响应特定的地表条件 和海表温度（SST）异常，以及这种响应如何 改变了陆地上的降水模式。 重点是使用气候模型来阐明物理 机制，而不是生成最真实的模拟可能。 将使用大气环流模式（GCM）进行试验， 分离SST分布和陆面的影响 属性，如土壤湿度，表面粗糙度和粗糙度， 热带大陆降水场。 线性化 GCM上的版本将用于进一步诊断GCM的 反应 与更复杂的GCM模拟和 观测结果将用于将结果与真实的气候联系起来。 这项研究很重要，因为它试图提高 了解陆地表面特性如何影响气候。

The purpose of this research is to contribute to our understanding of how precipitation distributions are established over Africa and South America. The investigation will be conducted by comparisons among climate models of various degrees of complexity. Analysis will focus on understanding how the tropical atmospheric dynamics responds to specified land surface conditions and sea surface temperature (SST) anomalies, and how this response modifies precipitation patterns over land. The focus is on using climate models to illuminate physical mechanisms, not to generate the most realistic simulation possible. Experiments with a general circulation model (GCM) will be used to isolate the effects of SST distributions and land surface attributes, such as soil wetness, surface albedo and roughness, on the continental precipitation field in the tropics. A linearized version on the GCM will be used to further diagnose the GCM's response. Comparisons with more complex GCM simulations and with observations will be used to relate results to the real climate. This research is important because it attempts to enhance knowledge about how land surface properties affect climate.