CAJ | 학술논문

利用华北平原地区的13个站点,45年（1951～1995)的降水资料,对夏季4个时段（6月、7月、8月、6～8月）进行了Z指数计算,确定了该地区各个时段的严重涝年和严重旱年.发现华北地区雨季的严重洪涝主要集中在7,8月,严重干旱则主要发生在8月,并可明显看出由50～60年代的多水期向70年代中期以后的少水期的转变,另外,乌拉尔山到巴尔喀什湖附近的低压槽加深和西北太平洋副热带高压的北抬,对华北地区雨季持续性暴雨的产生起着决定性的作用.严重洪涝年的夏季（6～8月）,西北太平洋副热带高压偏西、偏北,赤道东太平洋海温多处于下降阶段;严重干旱年西北太平洋副高偏东、偏南,赤道东太平洋海温则处于上升阶段.
이용화북평원지구적13개참점,45년（1951～1995)적강수자료,대하계4개시단（6월、7월、8월、6～8월）진행료Z지수계산,학정료해지구각개시단적엄중로년화엄중한년.발현화북지구우계적엄중홍로주요집중재7,8월,엄중간한칙주요발생재8월,병가명현간출유50～60년대적다수기향70년대중기이후적소수기적전변,령외,오랍이산도파이객십호부근적저압조가심화서북태평양부열대고압적북태,대화북지구우계지속성폭우적산생기착결정성적작용.엄중홍로년적하계（6～8월）,서북태평양부열대고압편서、편북,적도동태평양해온다처우하강계단;엄중간한년서북태평양부고편동、편남,적도동태평양해온칙처우상승계단.
Monthly rainfall data from 1951 to 1995 for June,July and August in 13 meteorological stations of the North China were used for accounting Z index and discussing serious flood and drought featureas in these months.Serious flood mainly happened in July and August,and sevious drought mainly happened in August.There were more flood in 1950's to 1960's and more drought since 1970's in the North China.Meanwhile,the deeper trough which covered the regions from the Ural Mts.to the Balkhash Lake play an important role in serious rainstom in rainy season in the North China.There often happened serious flood(drought)when the Northwester Pacific subtropical high was by west and north(east and south),and the Sea Surface Temperature in the equatorial central and eastern Pacific was mainly in dropping(raising)stage.