CAJ | 학술논문

利用常规高空探测资料,分析了2000—2012年4—6月850 hPa层位势高度差异常(上海宝山或大陈岛站850 hPa层位势高度值比贵阳站大7 gpm或以上)形势下低空环流与江西降水的关系.结果表明,这种形势下,700 hPa高度层上均有西南低涡活动.近50%的个例江西省上空850 hPa层出现风速16 m/s以上的低空西南急流,约40%的个例有切变线活动;若去除850 hPa无切变线影响和切变线出现较晚的情形,江西省出现10站以上暴雨过程的比例为85.7%.
이용상규고공탐측자료,분석료2000—2012년4—6월850 hPa층위세고도차이상(상해보산혹대진도참850 hPa층위세고도치비귀양참대7 gpm혹이상)형세하저공배류여강서강수적관계.결과표명,저충형세하,700 hPa고도층상균유서남저와활동.근50%적개례강서성상공850 hPa층출현풍속16 m/s이상적저공서남급류,약40%적개례유절변선활동;약거제850 hPa무절변선영향화절변선출현교만적정형,강서성출현10참이상폭우과정적비례위85.7%.
The conventional observation data are used to analyze the relationship between low-level circulation and the precipitation in Jiangxi province under the background of unusual 850 hPa-geopotential height difference (the geo-potential height in Baoshan in Shanghai or in Dachen Island is 7 gpm larger than that in Guiyang). Under such situation there has southwestern vortex at 700 hPa, nearly 50% of the cases show low-level southwestern jet with 850 hPa wind speed more than 16 m/s over Jiangxi and about 40% of the cases show shear lines. The occurrence probability of heavy rainfall at more than 10 stations is 85.7% if there is no 850 hPa shear lines or the shear lines appear too late.