臺灣博碩士論文加值系統

氣膠微粒對太陽輻射同時具有散射或吸收的能力,因此對於全球環境
變遷的過程具有重大影響,為影響全球氣候變化的原因之一,本研究於民
國84年秋季到冬季分別在中壢及臺南地區進行各一個月的採樣,使用SMPS
和PMS量測大氣中氣膠微粒的粒徑分布，同時以積分散光儀量測微粒的散
光係數，並對氣膠微粒細粒徑及其氣相前驅物以圓套管採樣器(Annular
Denuder)採樣，以供進一步分析微粒的化學組成。 在中壢及臺南地
區採樣的結果顯示,中壢地區綠光波長氣膠散光係數的數值在5*10-5
~1.5*10-4m-1的範 圍間,臺南地區綠光波長氣膠散光係數的數值則
在1*10-4~3*10-4m-1的範圍間,和都市污染物空氣中氣膠微粒散光係數的
數值相當一致。 在本研究評估的三種估算散光係數方法中,由化學成
分統計迴歸推估散光係數模式預測散光係數最準確, 但其變動性較大,而
簡易理論散光係數模式預測散光係數同時具有準確性高及變動性低的優
點,MARS理論散光 係數模式預測散光係數則在臺南地區較佳,中壢地區預
測的結果準確性低且變動性高。

The scattering and/or absorption of atmospheric aerosols to
the solar radiation play an important role in the global change
as well as in the global weather change. Atmospheric aerosols
were collected at Chungli and Tainan each for a month from fall
to winter in 1995. A scanning mobility particle sizer ( TSI
model 3934 SMPS ) and an aerosol spectrometer ( PMS model PCASP-
X ) were used to measure aerosol size distribution, and an
integrating Nephelometer was set up to acquire aerosol light-
scattering coefficient. In the meantime, fine particles ( cut-
size ≦2.5μm ) were sampled through an annular denuder to
investigate chemical species of aerosol mass and their precursor
gases. The green-wavelength light-scattering coefficients
measured at Chungli were in the range of 5*10-5 and 1.5*10-4
m-1, while those at Tainan were varied from 1*10-4 to 3*10-4
m-1. The aerosol light-scattering coefficients acquired in this
work are consistent with values reported in other urban area.
Among the three methods in estimating aerosol light-scattering
coefficients evaluated in this study, the statistical regression
model from chemical species is the most accurate one but lacks
of stability, the simplified theoretical model possesses both
the high accuray and stability, the MAR theoretical model (
Wilson and Reist, 1994 ) has a good performance on estimating
Tainan data but was bad in Chungli data.