摘要
近50年来，河西走廊平原区的气温在20世纪60～80年代偏低，90年代以后明显偏高，其中冬季升温显著，而降水在60年代偏少，70年代最多，80年代又偏少，90年代以后又偏多，2000年以来秋季降水增加显著。在全球变暖背景下，走廊平原区的气温突变明显，而降水突变不明显；区域气温突变比较一致，春、夏、秋季在90年代中后期发生升温突变，冬季在80年代中期发生升温突变，年平均气温在80年代中期和90年代中后期也发生升温突变；降水突变存在一定的区域差异，东、西部降水在60年代中后期发生突变，突变后降水量增多。
During the last 50 years,the temperature of Hexi corridor was lower from the 1960s to the 1980s, and climate has been becaming warmer since the 1990s by the rise of temperature in winter. While the precipitation experienced a process of being lower （the 1960s）, higher （the 1970s）, lower （the 1980s）, higher （after the 1990s） change , and the rise of precipitation in autumn has became obvious since 2000. What＇ s more, of temperature was more obvious than precipitation under the background of global wanning. the abrupt The abrupt change of temperature rise in spring, summer and autumn happened in the late 1990s, and the abrupt change of temperature rise in winter happened in the middle of the 1980s change of annual temperature ascending happened in the middle in the Hexi corridor. As result, The abrupt of the 1980s and in the late 1990s. Spatial difference of precipitation break was obvious. The abrupt change of precipitation rise happened in the late 1960s in the eastern and western Hexi corridor.
出处
《地理科学》
CSCD
北大核心
2008年第4期525-531,共7页
Scientia Geographica Sinica
基金
国家自然科学基金项目(90511007,90702001)
中国科学院创新群体项目(CXTD-Z2005-2)
中国科学院重要方向性项目(KZCXZ-YW-317)
西北师范大学自然地理学省级重点学科资助
关键词
年代际变化
年际变化
气候突变
河西走廊
interdecadal variation
interannual change
climatic break
Hexi corridor
