中文摘要：

利用青藏高原及其毗邻地区22个辐射观测站建站至2000年的总辐射及日照百分率观测资料,确定了Angstr m-Prescott模型参数,以此模型估算了高原及毗邻地区116个站1961年1月至2000年12月份的总辐射.结合高原地区75个气象站的冻土观测资料,探讨了青藏高原地区总辐射变化对高原土壤季节冻结深度的影响.结果显示,冬季总辐射变化对季节冻深有较大影响.冷湖、玉树两个较典型的站点中总辐射与土壤冻结深度的负相关关系显著,与典型站点相似,德令哈、格尔木两站总辐射与季节冻深亦呈负相关.研究区域内,近乎80%的调查站点,总辐射与季节冻结深度之间关系呈现负相关;另外21%的站点呈现正相关关系.多元回归分析结果显示,纬度、海拔、总辐射及气温4个因子与季节冻结深度的相关显著.总辐射是高原土壤季节冻结深度的重要影响因子之一.

英文摘要：

In this study, monthly average daily global radiation of 22 radiometric stations over the Tibetan Plateau from the station erected to 2000 were utilized to determine the coefficients of monthly Angstr m Prescott＇s model for estimating global solar radiation from sunshine duration. Using the model, global solar radiations of other 116 meteorological stations across the Tibetan Plateau were estimated. Combined with the frozen ground data measured at 75 stations, global radiation budget effects on seasonal frozen depth were discussed. The result shows that the budget of global radiation in winter does much influence on the seasonal frozen depth. The relationship between the global solar radiation budget and the season frozen ground in the two typical stations shows a remarkable negative correlation. As a whole, the seasonal frozen depth in nearly 80% investigation stations had the same relationship with the global solar radiation budget as those typical stations. The others 20% showed a positive correlation. It is indicated that the seasonal frozen depth was the result of combined effects of several other factors except the global radiation budget, such as soil water content, soil property, elevation and latitude. Multiple regression analysis result shows that latitude, elevation, global solar radiation/relative sun shine duration and air temperature showed high correlation with frozen depth. Essentially, the influences of local latitude and elevation can regard as the effects of global radiation indirectly. As the local latitude and elevation affecting the distribution of global radiation, the global radiation is an important affecting factor on seasonal frozen depth. And the combined effects of latitude, altitude, global radiation and air temperature can be used to describe the characteristics of seasonal frozen depth.