摘要
利用1961～2002年陕北黄土高原16个气象站的气温、降水量、相对湿度和风速等资料，对陕北黄土高原近42年的气候变化作了较全面的分析。结果表明：近42年来陕北黄土高原地区降水量的变化是在波动中呈减少趋势（每10年-25．31mm），降水量的减少主要是秋季降水变化所引起；气温呈上升趋势（每10年0．26℃），各季中以冬季增温最显著；该区20世纪80年代为相对冷湿期，90年代以后向暖干发展。
The climate changes and their characteristics over the northern Shaanxi plateau in recent 42 years are comprehensively analyzed on the basis of the data of mean air temperature, precipitation, relative humidity and wind speed of 16 stations from 1961 to 2002. The results show that the precipitation in recent 42 years decreased by - 25.31 mm per 10 years, especially in autumn. The temperature increased by 0.26 ℃ per 10 years, and it was remarkably higher in winter. It was relatively cold and wet in the 1980s, and became worm and dry from the 1990s.
出处
《气象科技》
2007年第1期45-48,共4页
Meteorological Science and Technology
关键词
陕北黄土高原
气候变化
平均气温
降水
northern Shaanxi plateau, climate change, mean air temperature, precipitation
