河西走廊东部近50年气候变化特征及区内5站对比分析

利用河西走廊东部武威市五个气象站近50年气温、降水资料,运用统计学的方法,详细分析了当地气温、降水的时空变化特征,并进行了对比分析.结果表明,北部川区气温远大于南部山区,随海拔高度的升高气温逐渐降低；北部川区降水远小于南部山区,随海拔高度的升高降水逐渐增多.各地年平均气温呈上升趋势,20世纪90年代以来升温明显.从平均...

Change characteristics and 5 stations contrastive analysis of climatein eastern Hexi corridor in recent 50 years

Using nearly 50a temperature and precipitation data of five stations in Wuwei of eastern Hexi corridor, the characteristics of temporal and spatial change of temperature and precipitation in the area were analyzed, and contrastive analysis was also conducted with statistics method. The results showed: The temperature of north plain area was far higher than that of south mountainous area, and the temperature reduced gradually along with rise of altitude. The precipitation of north plain area was far less than that of south mountainous area, and the precipitation increased gradually along with the rise of altitude. The regional annual mean temperature assumed a trend of escalation, and the temperature had elevated obviously since the 1990s. Viewed from the change of the average temperature, the highest temperature and the lowest temperature, the elevation scopes of various seasons'' temperature were winter > spring > autumn > summer, the winter warming was far greater than other three seasons. The elevation scopes of the average lowest temperature was bigger than that of the average highest tempe rature, which explained that the night warming was bigger than the daytime warming. The high temperature weather mainly appeared from June to September, while t he low temperature weather mainly appeared from November to March of next year. Yearly precipitation of every region (except Gulang) assumed increasing tendency . The increasing scopes of the various seasons'' precipitation were summer > autumn > spring > winter, precipitation''s increase of summer was the biggest to year precipitation''s contribution. Precipitation was mainly light rain. Precipitation days reduced rapidly along with the precipitation magnitude''s enhancement. The strong precipitation only appeared from May to September.