中国地表太阳总辐射空间化模拟及其时空特征分析

Spatial simulation and spatiotemporal changes analysis of total solar radiation on the earth’s surface in China

以1960—2019年全国99个气象台站太阳辐射观测数据和839个气象台站的气温日较差为基础数据,利用Bristow-Campbell太阳总辐射估算模型,对中国地表太阳总辐射进行空间化模拟,分析了太阳总辐射的时空变化特征。结果表明,中国地表太阳总辐射南多北少,西多东少,受地形海拔因素影响很大;青藏高原一带的地表太阳总辐射最大,四川盆地及新疆部分盆地区域的太阳总辐射最小;对研究区整体而言,分析期的地表太阳总辐射呈减小趋势,为-0.0074MJ·m^(-2)yr^(-1)。

In this paper,the solar radiation observation data of 99 meteorological stations and the daily temperature difference data of 839 meteorological stations from 1960 to 2019 were used as data sources.The Bristow-Campbell total solar radiation estimation model was used to realize the spatial simulation of total solar radiation in China and analyzed the characteristics of spatiotemporal changes of solar radiation from 1960 to 2019.The results show that the total surface solar radiation in China is much less in the north and east,and more in the south and west.Greatly affected by the terrain altitude,the total surface solar radiation in the Qinghai-Tibet Plateau is the largest,and the total solar radiation in the Sichuan and Xinjiang basins is the smallest.For the study area as a whole,the total surface solar radiation from 1960 to 2019 shows a decreasing trend,which is-0.0074 MJ·m^(-2)yr^(-1).