CAJ | 학술논문

利用淮海地区1955-2004年23个气象站点的逐日降水资料,分析了淮海地区降水的主要周期振荡以及突变点,结果表明:该地区降水均有多个时间尺度的周期变化特征,降水周期变化显著,干湿交替现象明显;降水的年代际以及年际尺度的主要周期:年降水为12 a、9 a、5 a,春季降水为14 a、6 a、3 a,夏季为10 a、4 a,秋季为21 a、10 a、7a ,冬季为18 a、5 a.年降水减少趋势明显,在1967年发生了突变,由相对多雨期转入相对少雨期;春季、夏季、秋季降水都有不同程度的减少趋势,而冬季降水则表现为增加的趋势.
이용회해지구1955-2004년23개기상참점적축일강수자료,분석료회해지구강수적주요주기진탕이급돌변점,결과표명:해지구강수균유다개시간척도적주기변화특정,강수주기변화현저,간습교체현상명현;강수적년대제이급년제척도적주요주기:년강수위12 a、9 a、5 a,춘계강수위14 a、6 a、3 a,하계위10 a、4 a,추계위21 a、10 a、7a ,동계위18 a、5 a.년강수감소추세명현,재1967년발생료돌변,유상대다우기전입상대소우기;춘계、하계、추계강수도유불동정도적감소추세,이동계강수칙표현위증가적추세.
Using the daily precipitation data (1955-2004) of 23 meteorological stations in Huaihai region, the periodic and abrupt changes of processes in recent 50 a are analyzed. The results show that precipitation has multi-time-scale features. The variations of precipitation periods and the phenomenon of transformation between dry and wet periods are obvious. The tests on periodic changes indicate that annual precipitation has 12,9 and 5 a period; spring precipitation has 14, 6 and 3 a period, summer precipitation has 10 and 4 a period; autumn precipitation has 21, 10 and 7 a period; winter precipitation has 18 and 5 a period. The decreasing trend of annual is obvious and the abrupt year was 1967. Spring, summer and autumn precipitation have descending trend in various degrees, but winter precipitation has increasing trend.