摘要
利用湖北省７２站１９６１～１９９５年逐月最高、最低气温资料，计算并详细分析了湖北省年、四季及逐月气温日较差的线性变化趋势。结果表明：（１）年最低气温呈明显上升趋势，而最高气温为下降趋势，因此气温日较差呈显著减小趋势。（２）就四季来看，最高气温在春、夏、冬季均呈下降趋势，但只有夏季的下降趋势是显著的，秋季呈弱上升趋势；最低气温在四季均呈上升趋势，但只有冬季的上升趋势是显著的；气温日较差在冬季与夏季均有显著的减小趋势，冬季的减小趋势幅度最大。（３）逐月中，有７个月的最高气温为下降趋势，其中３、６、７月显著下降，以３月的下降率最大；有８个月的最低气温为上升趋势，其中冬季３个月显著上升；全年有９个月的气温日较差呈减小趋势，其中１、３、６、７、８月共５个月的气温日较差显著减小，１月的减小趋势幅度最大。
Monthly mean maximum and minimum temperatures in 72 stations from 1961 to 1995 inHubei Province were employed, and the linear trends of change of the diurnal temperature range. tin year, season and month were calculated and analysed in detail. The results are as follows: (1 )annually, mean minimum temperatures are significantly increasing, but the mean maximum temperatures are decreasing, therefore, the diurnal temperature range are obviously decreasing. (2)seasonly, the mean maximum temperatures are decreasing in spring, summer and winter, but thedecrease is significant only in summer, the mean maximum temperatures being slightly increasingin autum; the mean minimum temperatures are increasing in all the seasons, but the increase is obvious only in the winter; the diurnal temperature ranges are significantly decreasing in winter andsummerl but the decreasing rate is the biggest in winter. (3) monthly, there are seven monthswith the mean maximum temperatures decreasing, but the decrease is obvious in March, June andJuly, with the biggest decreasing rate in March; there are eight months with the mean minimumtemperatures increasing, but the increase is significant only in three months in winter; there arenine months with the diurnal temperature decreasing, but the decrease is obvious in January,March, June, July and August, with the biggest deceasing rate in January.
出处
《长江流域资源与环境》
CAS
CSCD
1999年第2期162-167,共6页
Resources and Environment in the Yangtze Basin
基金
湖北省自然科学基金!97J096
关键词
湖北省
气温日较差
变化趋势
Hubei Province, diurnal temperature range, the trend of change
