CAJ | 학술논문

利用中国华东地区90站点1960--2009年夏季（6—8月）逐日降水资料，分析了近50a来华东地区各类极端降水事件的强度和发生频次的年代际变化。结果表明：华东地区极端降水事件年代际变化特征明显。近20a来，不论是极端降水事件的平均强度还是发生次数都要明显高于前30a；1990年代是极端事件多发且强度较强的年代；华东区域极端强降水过程事件的连续降水日数多在9d以下，而极端连续降水日数事件基本在9d以上；较之华东地区其他区域，福建地区存在更多的强度大、持续久的降水过程；华东地区最大极端降水量出现在江西北部与安徽南部的交界区域。极端降水事件频发带存在南北摆动的年代际变化，这一特征在极端日降水事件和极端强降水过程事件上表现得更为明显。同时，存在两个极端事件频发带，分别位于长江流域附近。在后3个年代，这两个频发带呈现出分一合一分的年代际变化特征。
이용중국화동지구90참점1960--2009년하계（6—8월）축일강수자료，분석료근50a래화동지구각류겁단강수사건적강도화발생빈차적년대제변화。결과표명：화동지구겁단강수사건년대제변화특정명현。근20a래，불론시겁단강수사건적평균강도환시발생차수도요명현고우전30a；1990년대시겁단사건다발차강도교강적년대；화동구역겁단강강수과정사건적련속강수일수다재9d이하，이겁단련속강수일수사건기본재9d이상；교지화동지구기타구역，복건지구존재경다적강도대、지속구적강수과정；화동지구최대겁단강수량출현재강서북부여안휘남부적교계구역。겁단강수사건빈발대존재남북파동적년대제변화，저일특정재겁단일강수사건화겁단강강수과정사건상표현득경위명현。동시，존재량개겁단사건빈발대，분별위우장강류역부근。재후3개년대，저량개빈발대정현출분일합일분적년대제변화특정。
Using the daily rainfall data of 90 stations in East China from 1960 to 2009 ,the interdecadal changes of occurrence frequency and intensity of precipitation extremes in boreal summer (June-July- August) in East China in recent five decades are investigated. Results show that there are significant in- terdecadal changes of the precipitation extremes in the past 50 years. In recent 20 .years, the precipitation extremes occur more frequently than those in the earlier 30 years, and more and stronger extreme pre- cipitation events are observed in 1990s. In East China, the extreme events of precipitation processes last usually less than 9 days. However, the extreme events of continuous rainy days last usually more than 9 days. Relative to the other regions in East China, the more precipitation processes with higher persist- ence and stronger intensity occur in Fujian Province. The largest extreme rainfall appear in conjunction part of Jiangxi and Anhui provinces. Zones where the extreme events of precipitation occur more fre- quently moves interdecadally in meridional direction. The north-south shifts of the zones mentioned a- bove are also observed in the extreme events of daily precipitation and precipitation processes. Interest- ingly, there exist two frequent occurrence zones of precipitation extreme events over the south and north of Yangtze River, respectively. The two zones get closer to each other and even merge into one in some decades, and get distant from each other in other decades, which is observed in the last three decades.