近50年来云南气候带的变化特征  

Variations of Yunnan Climatic Zones in Recent 50 Years

作　　者：程建刚[1] 王学锋[2] 范立张[2] 杨晓鹏[2] 杨鹏武[2] 

机构地区：[1]云南省气象局,昆明650034 [2]云南省气候中心,昆明650034

出　　处：《地理科学进展》2009年第1期18-24,共7页Progress in Geography

基　　金：云南省自然科学基金重点项目"云南重大气候灾害形成机理研究"(2003D0014Z);云南省气象局多轨道业务研究专项"动力模式产品在云南短期气候预测的应用研究"

摘　　要：利用云南115个气象观测站1961-2006年逐日平均气温求算稳定≥10℃积温,并对积温资料按年代建立与海拔、经度和纬度相关联的小网格推算模型,再应用地理信息系统(GIS)订正到0.01×0.01°网格点,得出云南5个不同年代细网格积温分布。在此基础上划分7个气候带地理分布图,并分别计算其面积。据此分析,近50年来云南气候带总体上呈现热带亚热带范围扩大、温带范围减少的变化趋势,其中以北热带增加最明显,增幅达到90.2%;而南温带减少最明显,减幅为12.5%。在年代际变化上,1960-1970年表现出热带亚热带范围减小,温带范围增加;从1970年后则呈现热带亚热带范围快速增加,温带范围减小的趋势,而1990年代以来是气候带变化最大的时期。Using 1961-2006 daily average temperature from 115 meteorological observation stations in Yunnan Province, the accumulated temperature （≥ 10℃） was calculated. This paper built the small reckon model by the altitude, longitude and latitude difference with a decade, and revised into the 0.01°×0.01° grid points by GIS. We obtain the distribution of the small grid accumulated temperature in five decades. Then we divided Yunnan into seven climatic zones, and calculated their area. The study has been conducted on seven climatic zones in Yunnan during five periods since the 1960s, which shows increasing/decreasing trends in the size of tropical and subtropical/temperate zones as a whole. It is distinct that North Tropical/South Temperate Zone experienced an increase of 90.2%/a decrease of 12.5%. As far as interdecadal variability is concerned, it shows a decreasing/an increasing trend in the size of tropical and subtropical/temperate zone during the 1960s-1970s. It has a significant increasing/decreasing trend in the size of tropical and subtropical/temperate zone after the 1970s, and especially marked change has happened since the 1990s.

关 键 词：气候带 时空分布 地理信息系统 云南 

分 类 号：P467[天文地球—大气科学及气象学]