气象Issue(1)：1-16,16.DOI:10.7519/j.issn.1000-0526.2015.01.001
青藏高原、中国东部及北美副热带地区夏季降水系统发生频次的TRMM资料分析
Analysis of Occurrence Frequency of Precipitation Feature over Tibetan Plateau,East China and Subtropical North America in Boreal Summer Using TRMM Data
摘要
Abstract
Using TRMM data from 1998 to 2011,occurrence frequency of radar precipitation feature (RPF) over Tibetan Plateau (TP),eastern China (EC),west subtropical North America (WNA)and east sub-tropical North America (ENA)in boreal summer (June-August)are comparatively analyzed.A RPF is defined as a three-dimensional obj ect consisting of pixels with precipitation near the ground observed by the TRMM precipitation radar.For each region,RPFs are divided into three groups:all RPF,large RPF (area larger than 1000 km2 ),and small RPF (area less than or equal to 400 km2 ).Occurrence frequency of RPF number and occurrence frequency of RPF pixel number in each group over each region are analyzed. The results are as follows:(1 )The maximum and minimum occurrence frequencies of RPF number are over TP and ENA,respectively.In contrast,the maximum and minimum occurrence frequencies of RPF pixel number are over EC and TP,respectively.(2 )Diurnal variations of occurrence frequency of RPF over the four regions mainly present a single peak in afternoon to late-afternoon,with the peak of the large RPF appearing later than that of the small RPF.In contrast,diurnal variation of occurrence frequency of RPF pixel number over EC presents double peaks.(3)Diurnal variations of occurrence frequency of RPF pixel number are consistent with those of rainfall based on rain gauge observations in previous literature.关键词
青藏高原/降水系统发生频次/TRMM/中国东部/北美副热带地区Key words
Tibetan Plateau/occurrence frequency of radar precipitation feature/TRMM/eastern China/subtropical North America分类
天文与地球科学引用本文复制引用
周胜男,罗亚丽,汪会..青藏高原、中国东部及北美副热带地区夏季降水系统发生频次的TRMM资料分析[J].气象,2015,(1):1-16,16.基金项目
国家重点基础研究发展计划（973计划）（2012CB417202）、国家科技支撑计划项目（2012BAC22B03）、国家自然科学基金项目（41175049和41221064）和中国气象科学研究院基本科研业务费项目（2012Y001）共同资助 （）
