Extratropical Cyclone Hydrometeor Vertical and Horizontal Spatial Correlation Structure

该项目将对观测到的雷达反射率进行统计相关分析，以调查水流星(云和降水)场的垂直和水平空间结构，例如云卫星数据、导出的地面降雨率和其他卫星数据(包括AMSR-E、MODIS和CERES数据)。初步分析表明，在不考虑天气条件的情况下，南半球温带地区的水流星在水平和垂直方向上的相关长度比北半球长，而降水发生在水平和垂直方向上的相关长度较短。为了深入了解这种半球差异，该计划将在南太平洋地区应用合成技术提取控制气旋降水和云结构的因素。该项目将促进发现和理解，同时通过直接支持一名研究生研究人员促进教学，该研究人员将在当地举办关于这项研究的研讨会，并通过会议介绍和同行评议出版物传播研究成果。

This project will investigate the vertical and horizontal spatial structure of hydrometeor (cloud and precipitation) fields using statistical correlation analysis applied to observed radar reflectivity as evidenced in satellite data e.g. CloudSat, derived surface rain-rates and other satellite data (including AMSR-E, MODIS, and CERES retrievals). Preliminary analysis incorporating all observations regardless of synoptic conditions, has indicated that southern hemisphere extratropics have longer correlation lengths of hydrometeor occurrence in the horizontal and vertical than the northern hemisphere, however there are shorter correlation lengths in precipitation occurrence. To gain insight into such hemispheric differences, the plan is to draw out factors controlling precipitation and cloud structure in cyclones applying compositing techniques in the South Pacific region. This project will advance discovery and understanding while at the same time promote teaching and learning by supporting directly a graduate student researcher, who will give local seminars on this research, as well as disseminate research results through conference presentations and peer-review publications.