塔克拉玛干沙漠地面有效辐射研究

本文利用塔克拉玛干沙漠科学考察期间采集的整年沙漠辐射观测资料,结合沙漠周围地区有效辐射计算值,分析了沙漠有效辐射的日变化及影响因子的作用,同时分析研究了沙漠及周围地区有效辐射的年变化以及有效辐射的地理分布。

RESEARCH ON SURFACE EFFECTIVE RADIATION IN TAKLIMAKAN DESERT

Based on the surface effective radiation data collected during the "1988~1990/s Scientific Investigation in Taklimakan Desert" and the calculated data or surface effective radiation in the surrounding areas of the desert, the features of daily variation of surface effective radiation and some influencing factors on surface effective radiation in the desert are analyzed. The temporal and spatial distribution of surface effective radiation is also studied for the desert and its vicinitise. The results are as follows: (1) Except the maximum value of mean daily effective radiation, 157. 1w / m2, occurs at 12 o'clock in January, it occurs at 1 1 o'clock in other months in a year. The maximum values of mean daily effective radiation are 256.5, 289.2 and 237.1 w / m2in April, July and October respectively. (2) The regional and seasonal difference of effective radiation is controlled by the main influencing factors, such as cloud species, cloud amount, air temperature, ground temperature, air humidity, etc. Drifting sand is an important factor affecting effective radia tion for Taklimakan Desert, especially in spring and summer. (3) The monthly varialion range of effectivc radiation is about 30 MJ. m-2. mon-1in a season, and it can be up to 100 MJ. m-2. mon-lat the season-changing time. The area with the maxim um value of effective radiation is in the hinterIand or Taklimakan Desert for Xinjiang, not in Turpan-Hami Basin.