摘要
本文用279个气象测站的年雨量资料得到中国东部(100°E以东)1891—1988年大范围平均雨量资料序列.对代表性进行了检验表明:序列在1921年以后能较好地反映大范围气候旱涝状况,而1920年以前则代表性较差.从雨量变化看中国东部的气候在近百年期间是干湿交替出现的,可以分成六个时段.在近四五十年中雨量有减少的趋势,前期雨量偏多,后期从60年代中期以来雨量持续偏少.而且这种变化与北半球副热带其他地区有同相变化的关系.在50年代以前副热带地区雨量的变化却没有明显的同相关系.
Using the data of annual total rainfall based on 279 meteorological stations which are scattered to the east of 100°E in China, a series of large scale annual mean precipitation during 1891-1988 has been established. The series has been statistically tested. It shows that climate in East China during recent century is altered with wet and dry, and can be divided into 6 periods. In recent 40 years the climate was wet in the early stage and then became persistently dry since middle 1960's. The variation of rainfall during this period is in-phase with those which happened in the other subtropical regions in the Northern Hemisphere, however, before 1950's the variation of rainfall along the northern subtropical zone was not in-phase.
出处
《大气科学》
CSCD
北大核心
1993年第4期451-461,共11页
Chinese Journal of Atmospheric Sciences
关键词
雨量变化
中国
东部
干期
湿期
Rainfall variation
East China
Dry period
Wet period.
