气象与环境学报
氣象與環境學報
기상여배경학보
JOURNAL OF METEOROLOGY AND ENVIRONMENT
2012年
2期
60-65
,共6页
廖玉芳%陈湘雅%赵福华%匡方毅
廖玉芳%陳湘雅%趙福華%劻方毅
료옥방%진상아%조복화%광방의
雨凇%大气环流%海温异常%相关
雨凇%大氣環流%海溫異常%相關
우송%대기배류%해온이상%상관
Glaze%Atmospheric circulation%Sea temperature anomaly%Correlation
雨凇是冬季影响湖南的一种主要气象灾害。对湖南雨凇与大气环流特征量和海温异常的相关性进行了分析。结果表明:亚洲区极涡面积和东亚槽位置对中国湖南雨凇天气影响极为重要。当欧亚纬向环流为低指数时,有利于中国湖南雨凇的形成;当东大西洋欧洲区阻塞高压面积指数为低指数和乌拉尔山区阻塞高压面积指数为高指数时,中国湖南多雨凇天气发生。冬季西太平洋副热带高压面积偏大、强度偏强和西脊点偏西不利于中国湖南雨凇发展。拉尼娜事件结束年同时为厄尔尼诺开始年的湖南雨凇最为严重,厄尔尼诺事件起始年的湖南雨凇强度最轻。
雨凇是鼕季影響湖南的一種主要氣象災害。對湖南雨凇與大氣環流特徵量和海溫異常的相關性進行瞭分析。結果錶明:亞洲區極渦麵積和東亞槽位置對中國湖南雨凇天氣影響極為重要。噹歐亞緯嚮環流為低指數時,有利于中國湖南雨凇的形成;噹東大西洋歐洲區阻塞高壓麵積指數為低指數和烏拉爾山區阻塞高壓麵積指數為高指數時,中國湖南多雨凇天氣髮生。鼕季西太平洋副熱帶高壓麵積偏大、彊度偏彊和西脊點偏西不利于中國湖南雨凇髮展。拉尼娜事件結束年同時為阨爾尼諾開始年的湖南雨凇最為嚴重,阨爾尼諾事件起始年的湖南雨凇彊度最輕。
우송시동계영향호남적일충주요기상재해。대호남우송여대기배류특정량화해온이상적상관성진행료분석。결과표명:아주구겁와면적화동아조위치대중국호남우송천기영향겁위중요。당구아위향배류위저지수시,유리우중국호남우송적형성;당동대서양구주구조새고압면적지수위저지수화오랍이산구조새고압면적지수위고지수시,중국호남다우송천기발생。동계서태평양부열대고압면적편대、강도편강화서척점편서불리우중국호남우송발전。랍니나사건결속년동시위액이니낙개시년적호남우송최위엄중,액이니낙사건기시년적호남우송강도최경。
Glaze is one of the major meteorological disasters in winter of Hu′nan province.The correlations between glaze and atmospheric circulation as well as sea surface temperature were analyzed in Hu′nan province.The results indicated that the polar vortex area over Asia and the location of East Asian trough play an important role to glaze weather in Hu′nan province.It is favorable to the formation of glaze in Hu′nan province when Eurasian zonal circulation index is low.Glaze weather often happens in Hu′nan province when the area index of East Atlantic blocking high over European is low and that of the Ural blocking anticyclone is high.It is not favorable to the development of galze in Hu′nan province if the area of western Pacific subtropical high becomes large and its intensity is strong,and the western normal position leans to west in winter.Glaze in Hu′nan province is most serious in the year that La Nina event ends and at the same time El Nino event begins.On the contrary,it is not serious in the starting year of El Nino event.