懸浮微粒衰減全天空太陽輻射之研究

The Extinction of Global Solar Flux by Aerosol

馮欽賜(S. T. Feng) ； 柳中明(C. M. Liu) ； 沈秀蓉(C. L. Sheng)

《大氣科學》 17卷4期 (1989/12) Pp. 287-302

摘要

本文首先探討晴日下，大氣中懸浮微粒衰減全天空太陽輻射通量的情形。結果發現懸浮微粒之影響，在台北宜蘭與恒春等三站，均不可忽略。本文更進而發展一參數方程式，以估算晴日時水汽、臭氧、分子散射，垂直分佈修正與懸浮微粒衰減等之影響情形，用以計算近地面之全天空輻射通量。經採用一組獨立於發展參數方程式之晴日個案，以驗證所發展之參數式的可信性。結果顯示，本文所發展之參數式所估算之數值相當合理，且均方根誤差亦不高。懸浮微粒衰減影響之重要性，在驗證過程中，亦顯示出為不可忽略之因素。本文最後利用此方程式，理論估算台灣全島因都市化後，大氣中懸浮微粒增加，而造成之全天空輻射通量衰減情形。結果顯示西部地區懸浮微粒可造成約35 langley day^(-1)的衰減，相當於10~12%的影響程度。

關鍵字

懸浮微粒 ； 全天空太陽輻射通量

並列摘要

This paper intends to study the effect of aeorosol on attenuating the global solar flux in a clear-sky condition, which proves to be substantial after analyzing the data collected at Taipei. Ilen and Hensen stations. A parameterized equation is also developed in this paper to assist a quantitative estimation of the effect of water vapor and ozone absorption. Rayleigh scattering, vertical distribution of atmospheric composition and aerosol extinction. By taking an independent dataset for comparison, our analyses show that the developed equation is quite accurate and useful with a low rms. In the final part of this paper, the deveopled eqution is used to estimate the increased aerosol content in Taiwan caused by continuous urbanization. The results show that at western plain the increased aerosol can cause the extinction of global solar flux up to 35 langley/day which is equivalent to 10-12% attenuation.

並列關鍵字

Aerosol ； Global Solar Flux