CAJ | 학술논문

使用国家气候中心（NCC）沿用的北半球阻塞高压监测公式，利用NCEP/NCAR逐日500 hPa环流场再分析资料，计算出1961-2011年逐日阻高指数，分析了北半球阻塞高压出现的关键地区阻高指数的年际和年代际变化特征及其与重庆夏季降水的联系。结果表明，三个关键区阻高的季节分布以鄂霍次克海阻高在冬季和夏季出现的频率最高，而春季和秋季则是乌拉尔山阻高活动频繁的季节，贝加尔湖地区阻高活动不及前两个区域活跃。从变化趋势来看，乌拉尔山阻高和鄂霍次克海阻高有增强的趋势，贝加尔湖阻高有减弱的趋势。各关键区的阻高日数都存在2～5年的显著性周期特点。三个关键区对重庆夏季降水的影响各有其特点，贝加尔湖和鄂霍次克海的阻塞形势对重庆夏季降水的影响较大，鄂霍次克海阻高日数对重庆夏季降水的影响比其强度对重庆夏季降水的影响关系更加显著，夏季鄂霍次克海阻高日数偏多（少），重庆夏季降水偏多（少）。
사용국가기후중심（NCC）연용적북반구조새고압감측공식，이용NCEP/NCAR축일500 hPa배류장재분석자료，계산출1961-2011년축일조고지수，분석료북반구조새고압출현적관건지구조고지수적년제화년대제변화특정급기여중경하계강수적련계。결과표명，삼개관건구조고적계절분포이악곽차극해조고재동계화하계출현적빈솔최고，이춘계화추계칙시오랍이산조고활동빈번적계절，패가이호지구조고활동불급전량개구역활약。종변화추세래간，오랍이산조고화악곽차극해조고유증강적추세，패가이호조고유감약적추세。각관건구적조고일수도존재2～5년적현저성주기특점。삼개관건구대중경하계강수적영향각유기특점，패가이호화악곽차극해적조새형세대중경하계강수적영향교대，악곽차극해조고일수대중경하계강수적영향비기강도대중경하계강수적영향관계경가현저，하계악곽차극해조고일수편다（소），중경하계강수편다（소）。
Daily blocking high index has been calculated in this paper over the Northern Hemisphere from 1961-2011 by means of daily NCEP/NCAR height data at 500 hPa .The inter-annual variation and inter-decadal variability of the three key areas and its relation to summer precipitation in Chongqing have also been analyzed .The result shows that ,from the point of seasonal variations ,the Okhotsk blocking high is the highest frequency of occurrence in winter and in summer ,the Ural blocking high is the highest fre-quency of occurrence in spring and in autumn ,and the lowest activity for the Baikal blocking high .Re-cently ,the Ural blocking high and the Okhotsk blocking high appear stronger than normal ,but the Baikal blocking high appears weak climatic background .The blocking days exist obviously cycle characteristics of 2 -5 years .For the blocking high of three key areas and its relation to summer precipitation in Chongqing , each has difference . The Okhotsk blocking days are obvious correlation to summer precipitation in Chongqing ,that are the more (few ) Okhotsk blocking days ,the floods (droughts) for summer precipitati-on in Chongqing .