暴雨灾害
暴雨災害
폭우재해
Torrential Rain and Disasters
2015年
3期
260-267
,共8页
积冰日数%海温%合成分析%电线%湖北省
積冰日數%海溫%閤成分析%電線%湖北省
적빙일수%해온%합성분석%전선%호북성
wire icing day%sea surface temperature%composited analysis%wire%Hubei Province
利用1980-2014年湖北省11个气象台站电线积冰观测资料以及Hadley海温资料、NCEP再分析资料,分析湖北省冬季(11-3月)电线积冰日数的气候变化特征;在此基础上,分析积冰异常年秋冬海气场变化.结果表明,湖北省电线积冰集中在钟祥、荆州、襄樊、仙桃和随州等5站,占11站电线积冰总日数的73%.电线积冰在当年11月至次年3月均有出现,积冰日数在1990年代初出现显著减少趋势.湖北省电线积冰异常偏多年,9-11月热带中东太平洋出现El Nino型异常海温分布,同期冬季孟加拉湾和南海的水汽向北输送至湖北,湖北水汽偏多,同时湖北受贝加尔湖异常反气旋东南侧东北气流和中国东部沿海异常反气旋西北侧偏南气流共同作用,有利于降水发生和积冰出现.
利用1980-2014年湖北省11箇氣象檯站電線積冰觀測資料以及Hadley海溫資料、NCEP再分析資料,分析湖北省鼕季(11-3月)電線積冰日數的氣候變化特徵;在此基礎上,分析積冰異常年鞦鼕海氣場變化.結果錶明,湖北省電線積冰集中在鐘祥、荊州、襄樊、仙桃和隨州等5站,佔11站電線積冰總日數的73%.電線積冰在噹年11月至次年3月均有齣現,積冰日數在1990年代初齣現顯著減少趨勢.湖北省電線積冰異常偏多年,9-11月熱帶中東太平洋齣現El Nino型異常海溫分佈,同期鼕季孟加拉灣和南海的水汽嚮北輸送至湖北,湖北水汽偏多,同時湖北受貝加爾湖異常反氣鏇東南側東北氣流和中國東部沿海異常反氣鏇西北側偏南氣流共同作用,有利于降水髮生和積冰齣現.
이용1980-2014년호북성11개기상태참전선적빙관측자료이급Hadley해온자료、NCEP재분석자료,분석호북성동계(11-3월)전선적빙일수적기후변화특정;재차기출상,분석적빙이상년추동해기장변화.결과표명,호북성전선적빙집중재종상、형주、양번、선도화수주등5참,점11참전선적빙총일수적73%.전선적빙재당년11월지차년3월균유출현,적빙일수재1990년대초출현현저감소추세.호북성전선적빙이상편다년,9-11월열대중동태평양출현El Nino형이상해온분포,동기동계맹가랍만화남해적수기향북수송지호북,호북수기편다,동시호북수패가이호이상반기선동남측동북기류화중국동부연해이상반기선서북측편남기류공동작용,유리우강수발생화적빙출현.
The daily wire icing data at 11 meteorology stations over Hubei Province, sea surface temperature (SST) from Hadley Centre, and reanalysis dataset from NCEP from 1980 to 2014 were used to analyze the climatic variation characteristics on the wire icing days in winter (from November to March) in Hubei. Moreover, we analyzed the field of sea temperature and atmosphere in the fall and winter of the anoma-lous wire icing years. The results indicate that the wire icing days distribute mainly in five cities (towns) namely Zhongxiang, Jingzhou, Xiang-fan, Xiantao and Suizhou in Hubei, accounting for 73%of the total icing days of 11 stations. Wire icing days generally are observed from No-vember of the current year to March of the next year in Hubei, and show a significant decreasing trend during the early 1990s. In the anoma-lously more icing years, the anomalous SST distribution with El Nino pattern is found over the central and eastern Pacific in tropics from Sep-tember to November of the previous year. In the same period, water vapor from the South China Sea and the Bay of Bengal in winter is north-ward conveyed to Hubei, and northeast airflow in southeast side of Lake Baikal anomalous anti-cyclone and southerly airflow in northwest side of anomalous anti-cyclone at the coast of eastern China interact on Hubei, which is favorable to the occurrence of precipitation and the emergence of icing in Hubei Province.
