热带气象学报2017，Vol.33Issue(3)：299-312,14.DOI:10.16032/j.issn.1004-4965.2017.03.002
华南前汛期典型涝年低频降水特征及其与低频水汽输送的关系
LOW-FREQUENCY RAINFALL CHARACTERISTICS OF THE TYPICAL FLOOD YEARS IN THE ANNUALLY FIRST RAINY SEASON OF SOUTH CHINA AND THEIR RELATIONSHIPS WITH LOW-FREQUENCY MOISTURE TRANSPORTATION
摘要
Abstract
Based on 753-stations' daily rainfall data provided by the National Meteorological Information Center and the NCEP/NCAR daily reanalysis data from 1961-2013,and HYSPLIT model synchronous driving data from NOAA,the low-frequency variability of the precipitation of nine typical flood years and its relationships with moisture transport in the annually first rain season (AFRS) of South China is investigated,and the source regions and transportation paths of low-frequency water vapor are discussed.The results show that the precipitation of the nine typical flood years is mainly controlled by 10 ～20 d oscillation in the AFRS,and 30～60 d low frequency oscillation is also significant in the area connecting Jiangxi with Fujian.Both the longitudinal and zonal water vapor flux have remarkable 10～20 d low frequency oscillation in the AFRS.There are four 10～20 d water vapor reference sources and transportation paths which affect the 10～20d low frequency precipitation of the nine flood years in the AFRS.These sources lie in the part of the Indian Ocean north of Madagascar Island and equatorial middle India Ocean(the southeast moisture transport channel),the ocean to the southeast of Japanese archipelago and the equatorial middle Pacific (the southeast moisture transport channel),north of the Caspian Sea and southeast of Lake Baikal (the northwest cold air channel),and Bering Sea (the northeast cold moisture transport channel).The above four water vapor transportation paths are verified by the backward trajectory simulations of water vapor in typical flood years of the AFRS at Fogang and Guangchang stations respectively,and the simulation sources all lie in the key areas of the moisture transport channels.Both the reference and simulation sources can be taken as important areas to make extended-period(2～6 days ahead)prediction.关键词
华南前汛期/典型涝年/低频振荡/水汽输送源地和路径Key words
annually first rain season of South China/typical flood years/low frequency oscillation/water vapor transport path and source分类
天文与地球科学引用本文复制引用
李丽平,杨春艳,孔德璇..华南前汛期典型涝年低频降水特征及其与低频水汽输送的关系[J].热带气象学报,2017,33(3):299-312,14.基金项目
公益性(气象)行业专项(GYHY201406024) （气象）
国家重点基础研究发展计划(973计划)项目(2015CB453202) （973计划）
国家自然科学基金重点项目(41330425) （41330425）
江苏高校优势学科建设工程资助项目(PAPD)共同资助. （PAPD）
