【摘要】 近年来,全球气候变暖已成为一个全社会广泛关注的课题,荒漠区是地球上极其重要的气候区之一,其对全球气候变暖的响应特征同样值得关注。本文以甘肃省民勤荒漠区为研究对象,对该区域1961-2009年的气温、降水、空气湿度、风速和日照的变化趋势进行了分析。结果表明,1961-2009年,民勤荒漠区年平均气温增高幅度高于全国水平,低于东北地区和西北干旱区水平,尤其春、冬季增温明显;当地年平均气温、年降水量、年平均空气相对湿度、年平均风速和年日照时数的变化均表现出一定的阶段性,但其变化阶段并不完全一致;年极端最高气温的波动显著增大,荒漠气候的不稳定性在增强。年平均风速为减小趋势,年空气相对湿度的波动为减小趋势,并与年降水量呈显著正相关(P<0.05),与年平均风速呈极显著负相关(P<0.01)。更多还原

【Abstract】 Global warming has become a widespread concern society as a whole in recent years,and desert climate was worth to pay more attention under global warming.Climate change,including the temperature,precipitation,air humidity,wind speed and sunshine in Minqin during 1961-2009,was analyzed in the paper.The results showed that the increasing rate of annual average temperature in Minqin desert area was higher than the national average,especially in spring and winter,but lower than northeast and northwest of China.The variation of annual average temperature,annual precipitation,annual average air relative humidity,average wind speed and sunshine hours changed in different stages.The highest temperature fluctuation increased significantly,instability of desert climate was stronger.The annual average wind speed and air humidity decreased.There was positive correlation between air humidity and precipitation(P<0.05),and negative correlation between annual average wind speed and air relative humidity(P<0.01).更多还原