热带气象学报2017，Vol.33Issue(2)：212-220,9.DOI:10.16032/j.issn.1004-4965.2017.02.007
近50年广东省分级降水的时空分布特征及其变化趋势的研究
THE CHARACTERISTICS OF PRECIPITATION IN GUANGDONG PROVINCE OVER THE PAST 50 YEARS:DEPENDENCE ON RAINFALL INTENSITY
摘要
Abstract
The characteristics of the precipitation over Guangdong Province over the past 50 years were investigated with the daily rainfall data of 86 stations from 1961 to 2010.The rainfall was divided into five categories according to its intensity,and their spatial and temporal characteristics were investigated.The annual rainfall amount is within 1 500～2 000 mm over most parts of Guangdong,but substantial differences were found among different parts of the province.The dry season is contributed mostly by daily rainfall amount rather than rainy days,while the flood season is contributed by not only rainy days but also daily rainfall amount.The spatial distributions of light rainy days (1 mm＜P＜10 mm) and moderate rainy days (10 mm＜P＜25 mm) resemble each other.The heavy rainy days (25 mm＜P＜50 mm),very heavy rainy days (50 mm＜P＜100 mm) and extreme rainy days are generally concentrated in three regions,Qingyuan,Yangjiang,and Haifeng/Lufeng.The averaged rainfall amount for rainy days increases from the north to the south of Guangdong,while decreasing as the rainfall intensity increases.The contributions from light rain,moderate rain and heavy rain to the total rainfall decreases from the north to the south of the province,but the contribution from very heavy rain and extreme rain increases from the north to the south.The annual rainy days show a decreasing trend in the past 50 years.The light rainy days decreased significantly while the heavy,very heavy and extreme rainy days increases slightly.The annual total rainfall amount increases over the past 50 years,which is contributed by heavy,very heave and extreme rains,while the contribution from light and moderate rains decreases.关键词
空间分布/降水量/降水日数/降水贡献率Key words
spatial distribution/rainfall amount/rainy days/rainfall contribution分类
天文与地球科学引用本文复制引用
郑腾飞,刘显通,万齐林,于鑫..近50年广东省分级降水的时空分布特征及其变化趋势的研究[J].热带气象学报,2017,33(2):212-220,9.基金项目
国家自然科学基金面上项目(41475102) （41475102）
国家自然科学基金(41461164006) （41461164006）
公益性(气象)行业专项(GYHY201406003) （气象）
国家重点基础研究发展计划(973计划)(2015CB452802)共同资助 （973计划）
