CAJ | 학술논문

利用在巴丹吉林沙漠开展的陆表能量水文过程野外综合试验太阳辐射及降水等观测资料,分析了试验期间到达地表的太阳辐射的时间分布特征和影响局地大气透明度的因子。结果表明：夏季降水不仅对浮尘天后的大气透明度有明显的改善作用,而且在完全晴日间的降水也使日平均大气透明度增加约9.0%,进而对到达地表的太阳辐射产生较大影响,而近地层的蒸散增强导致的空气湿度增加对局地大气透明度的影响可以忽略。因此,在我国西北干旱区沙尘多发地带夏季降水事件后,到达地表的太阳辐射能有明显增加的趋势。
이용재파단길림사막개전적륙표능량수문과정야외종합시험태양복사급강수등관측자료,분석료시험기간도체지표적태양복사적시간분포특정화영향국지대기투명도적인자。결과표명：하계강수불부대부진천후적대기투명도유명현적개선작용,이차재완전청일간적강수야사일평균대기투명도증가약9.0%,진이대도체지표적태양복사산생교대영향,이근지층적증산증강도치적공기습도증가대국지대기투명도적영향가이홀략。인차,재아국서북간한구사진다발지대하계강수사건후,도체지표적태양복사능유명현증가적추세。
By utilizing the global solar radiation data and precipitation observations collected in a land-atmosphere interaction field experiment in the Badain-Jaran Desert,we explored the influencing factors of local atmospheric transmittance derived from monthly mean diurnal variation of horizontal global solar radiation during the whole experiment.The results show that atmospheric transmittance was enlarged by the summer precipitation with wet removal of dust aerosol,and mean atmospheric transmittance in clear days was also increased by about 9.0% after rainfall event,which particularly affected the global solar radiation reaching to the land surface.Moreover comparative analysis of atmospheric transmittance before and after rainfall event show that the augment of moisture transfer from the surface caused by evapotranspiration after rainfall event has no significant effect on atmospheric transmittance.Therefore,the summer rainfall can lead to direct increase for atmospheric transmittance,and so solar radiation on the land surface in desert of western China would increase.