青藏高原地表长波辐射交换的气候研究

CLIMATOLOGICAL RESEARCH IN EXCHANGE OF SURFACE LONGWAVE RADIATION OVER THE QINGHAI-XIZANG PLATEAU

本文在讨论并验证大气逆辐射和地表有效辐射计算方法的基础上,计算并分析了两者在青藏高原及其周围地区的气候特征。结果表明,大气逆辐射和有效辐射的分布形势与高原地形有很大的一致性,高原主体分别为大气逆辐射的低中心和有效辐射的高中心。季节变化对大气逆辐射分布形势影响不大,而对有效辐射分布的影响较大,可造成高值中心的位移。最后,文中还就大气逆辐射和有效辐射的年变化问题作了讨论。

On the basis of discussion and verification of the calculation methods for downward atmospheric radiation and surface effective radiation, computation and analysis are done of their climatic features in the Plateau and surroundings. Results show that their patterns bear close conformity with the topography. The main body of the Plateau represents the low-(high-) value center for downward atmospheric (effective) radiation. Seasonal change has little effects on the former but appreciable influence on the latter, likely to causs the center's displacement. Finally, discussion is done of the yearly variation of both the radiation.