近40年来湖南省气温变化特征分析

利用湖南省29个站点1960～1999年的月气温资料,采用气候趋势系数、气候倾向率、累积距平、连续功率谱估计等方法,对湖南省年、季气温的时空变化特征进行了分析,结果表明:年、季气温的时空变化特征各不相同,冬季变暖,夏季降温,且气温空间变化受到地形的影响;年、季气温变化周期各不相同,年气温变化存在准22年的周期,与海尔周期相当一致。

The characteristics of air tempetature variation of Hunan Province during recent 40 years

Based on the monthly mean air tempetature data of 29 stations in Hunan Province in the recent 40 years(in 1960-1999),and using the climate tendency coefficient,climate tendency rate,cumulative departure,power spectrum methods,the temporal-spatial change characteristis of air tempetature of interannual and four seasons over the region are analyzed.The result show that there are different trends about the temporal-spatial change characteristis in years and in four seasons in recent 40 years.The warming trend in winter and cooling trend in summer are obvious.And the main mountain run in Hunan Province has obvious effect on the spatial change distribution of air tempetature.The trend in years and four seasons have different periodics.The air tempetature in years exist 22 year dominant periods,which is rather consistent with the Hill's period.