热带气象学报2017，Vol.33Issue(6)：1000-1008,9.DOI:10.16032/j.issn.1004-4965.2017.06.021
夏季东亚副热带西风急流不同尺度波的特征分析
ANALYSIS OF THE CHARACTERISTICS OF THE EAST ASIAN SUBTROPICAL WESTERLY JET UNDER DIFFERENT SCALES IN SUMMER
摘要
Abstract
By using the daily reanalysis data provided by National Centers for Environmental Prediction-National Center for Atmospheric Research (NCEP-NCAR) and daily precipitation data at 20:00 BT (Beijing Time) from Chinese meteorological stations during 1960-2015,spatial distribution and activity characteristics of the East Asia subtropical westerly jet (EASWJ) in summer,which are in zonal wind wave with the ultralongwave,long wave and synoptic-scale wave,are analyzed.A preliminary study on the relationship between the EASWJ with different spatial scales and typical Meiyu precipitation is performed.Research shows that ultra long wave is the main component of the disturbance of EASWJ,highly consistent with the position evolution of the jet stream.It also has a nice indication for rain belt change in position during the period of Meiyu.In addition,long wave and synoptic scale waves are sub-low trequency and medium-scale perturbations superimposed on ultra long waves,which has a certain corresponding relationship with the change of Meiyu intensity.The position change of the EASWJ and ultra long wave has a obvious characteristics of weekly and biweekly oscillation.So,full use of ultra long wave cycle may provide valuable reference information for medium-term weather analysis and forecasting.关键词
东亚副热带西风急流/不同尺度/特征分析/中期预报Key words
East Asia subtropical westerly jet/different scale/feature analysis/middle-range forecasting分类
天文与地球科学引用本文复制引用
龙晴柔,金荣花,肖天贵,杨宁,刘思佳..夏季东亚副热带西风急流不同尺度波的特征分析[J].热带气象学报,2017,33(6):1000-1008,9.基金项目
国家自然科学基金项目(41575066) （41575066）
国家科技支撑计划课题(2015BAC03B04)共同资助 （2015BAC03B04）
