中国东北三省地面太阳辐射变化及其对气温变化的影响

Variation of surface solar radiation and its influence on temperature change in three provinces of Northeast China

利用东北三省逐月地面太阳辐射及气温资料,分析了地面太阳辐射长期变化趋势,进一步基于大气系统热量平衡理论,定量分析了太阳辐射变化对气温的影响。结果表明:1970—2019年,东北三省地面太阳辐射经历了先减小后增加的变化趋势;1970—1989年,地面太阳辐射显著减少,削弱了最高气温的增加趋势,而在1993—2019年地面太阳辐射增加提高了最高气温的增加趋势;地面太阳辐射变化通过改变最高气温的变化改变了平均气温和气温日较差,在1970—1989年削弱了平均气温的增加趋势,减小了气温日较差;在1993—2019年增加了平均气温的增加趋势,加大了气温日较差。

As the fundamental source of energy for the earth,changes in surface solar radiation are bound to have a certain impact on temperature changes.This study used monthly surface solar radiation and temperature data from three provinces in the Northeast of China to analyze the long-term trend of surface solar radiation.Based on the heat balance theory of atmospheric system,the impact of solar radiation changes on temperature was quantitatively analyzed.The results showed that from 1970 to 2019,surface solar radiation in Northeast China experienced a trend of first decreasing and then increasing,with a significant decreasing trend from 1970 to 1989,and the average decrease of SSR was 216.49 MJ/m^(2) every 10 years,accounting for 4.33%of the multi-year average.From 1993 to 2019,the average increase of SSR was 37.54 MJ/m^(2) every 10 years,accounting for 0.75%of the multi-year average.The change in maximum temperature was directly influenced by changes in surface solar radiation.In the average situation of Northeast China from 1970 to 1989,the decrease in surface solar radiation weakened the increasing trend of maximum temperature,resulting in a decrease of 0.49℃every 10 years.From 1993 to 2019,the increase in surface solar radiation strengthened the increasing trend of max-imum temperature in Northeast China,with an increase of approximately 0.09℃every 10 years.Further ana-lysis revealed that changes in surface solar radiation altered the average temperature and diurnal temperature range by changing the maximum temperature.From 1970 to 1989,it weakened the increasing trend of average temperature in Northeast China and reduced the diurnal temperature range,while it strengthened them from 1993 to 2019.