青藏高原近50年来气温的年代际变化

根据青藏高原及周边地区一百多个气象台站的月平均气温资料，利用统计方法，分析了近50年来气温的年代际变化。结果表明：整个高原地区温度变化可分为6个不同的区域。在时间演变上可划分出相对高温时段(1963年以前)、相对低温时段(1963—1987年)和另一个相对高温时段(1987年以后)。还从天文因素、地球系统各圈层及气候系统内各因子相互作用和相互制约出发，探讨了引起高原气候变化的可能原因。

Decadal Temperature Changes over Qinghai-Xizang Plateau in Recent 50 Years

Based on the monthly temperature data of more than 100 stations over Qinghai\|Xizang Plateau and its neighboring regions from 1950\'s to the end of the twentieth century, utilizing statistical methods, the decadal temperature change in these regions in recent 50 years were analyzed. The results showthat the temperature variations over Plateau were divided into 6 subregions. On the temporal variation, there are two relatively warm phases(before 1963 and after 1987 respectively) interrupted by a relatively cold phase (1963\_1987). The possible reasons for temperature change overPlateau were discussed from the astronomical factor and the interaction among the components of the climate system.