气象研究与应用
氣象研究與應用
기상연구여응용
JOURNAL OF METEOROLOGICAL RESEARCH AND APPLICATION
2012年
4期
22-26
,共5页
冷暖空气交汇%TBB平均场:水汽收支
冷暖空氣交彙%TBB平均場:水汽收支
랭난공기교회%TBB평균장:수기수지
cold and warm air intersection%TBB mean field%vapor budget
利用常规观测观测资料、每隔6小时一次的1°*1°NCEP再分析资料以及相当黑体温度TBB对2011年10月6—7日预报偏差较大的广西区域性暴雨进行分析得出:副热带高压边缘的东南气流和台风“尼格”减弱后的后部偏南气流带来的暖湿空气和地面冷空气在桂中上空交汇,850hPa切变线和500hPa西风槽触发了暴雨的产生;比湿和假相当位温的分布显示了冷暖空气的对峙情况;TBB平均场的变化可以反映强降雨的落区和移动:水汽主要从东边界进人广西,少部分从南边界和北边界进入,来自于西北太平洋、孟加拉湾和东海洋面。
利用常規觀測觀測資料、每隔6小時一次的1°*1°NCEP再分析資料以及相噹黑體溫度TBB對2011年10月6—7日預報偏差較大的廣西區域性暴雨進行分析得齣:副熱帶高壓邊緣的東南氣流和檯風“尼格”減弱後的後部偏南氣流帶來的暖濕空氣和地麵冷空氣在桂中上空交彙,850hPa切變線和500hPa西風槽觸髮瞭暴雨的產生;比濕和假相噹位溫的分佈顯示瞭冷暖空氣的對峙情況;TBB平均場的變化可以反映彊降雨的落區和移動:水汽主要從東邊界進人廣西,少部分從南邊界和北邊界進入,來自于西北太平洋、孟加拉灣和東海洋麵。
이용상규관측관측자료、매격6소시일차적1°*1°NCEP재분석자료이급상당흑체온도TBB대2011년10월6—7일예보편차교대적엄서구역성폭우진행분석득출:부열대고압변연적동남기류화태풍“니격”감약후적후부편남기류대래적난습공기화지면랭공기재계중상공교회,850hPa절변선화500hPa서풍조촉발료폭우적산생;비습화가상당위온적분포현시료랭난공기적대치정황;TBB평균장적변화가이반영강강우적락구화이동:수기주요종동변계진인엄서,소부분종남변계화북변계진입,래자우서북태평양、맹가랍만화동해양면。
Using conventional observations, NCEP reanalysis data and TBB data of Guangxi in 2011 October, the regional rainstorm were analyzed. It shows that southeast flow along the subtropical high edge and the southerly flow in the rear of weakening typhoon "NALGAE" bring the warm moist air to converge with the ground cold air over Guangxi central region. The 850 shear line and 500hPa westerly trough trigger rainstorm. The distribution of specific humidity and pseudo-equivalent temperature shows the confrontation between cold and warm air. TBB mean-field can reflect heavy rainfall's drop zone and moving. The vapor from the Pacific Northwest, the Bay of Bengal and the East China Sea ocean enter Guangxi mainly (partly) through the east (south and north) boundary.