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BA71319447-10-P091
pdf
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27
基本情報
データ種別:学術成果リポジトリ
タイトル
Observation on Radiative Properties of Aerosol Particles Over the Urban Area of Nagoya
作成者
KHATRI, Pradeep
ISHIZAKA, Yutaka
TAKAMURA, Tamio
作成者ID
1000040272356
研究者リゾルバ
作成者の別表記
カトリ, プラディープ
石坂, 隆
高村, 民雄
1000040272356
研究者リゾルバ
内容
[ABSTRACT] In order to understand the effects of anthropogenic air pollutants on atmospheric heat budget, the radiative properties of aerosols were investigated over the urban area of Nagoya. Measurements included size distributions of aerosols greater than 0.3 μm in diameter, scattering coefficients and absorption coefficients. The mean values with standard deviations for hourly averages of scattering coefficients, absorption coefficients and single scattering abledos were reported to be 52.3±39.3Mm^-1, 24.6±18.3Mm^-1 and 0.66±0.13 respectively. Such low values of single scattering albedos suggest that aerosols of the urban area of Nagoya are highly absorptive in nature, which have a potential to warm our climate. Comparison of our results with other polluted cities of US and China were also performed. Mass scattering efficiency of dry aerosols and mass absorption efficiency of black carbon over the urban area of Nagoya were found to be around 4.7m^2g^-1, and 14.6m^2g^-1 respectively. Before and after the rain events, diurnal variations of radiative properties were observed. Such diurnal variations were suggested to be driven by local pollutants rather than meteorological changes throughout the day. The prominent peaks of black carbon concentrations and absorption coefficients during morning were suggested to be the effects of local sources such as burning and vehicles whereas peaks of scattering coefficients observed during afternoon were found to be the effects of photochemically driven aerosol production. Two different effects of rain events on scattering coefficients were also observed. It was estimated by the observation data that the rain events reduced scattering coefficients by washing out coarse and accumulation mode aerosols, whereas the continuous rain events increased scattering coefficients by condensing water vapor to non-washed aerosols of the atmosphere.
ハンドルURL
https://opac.ll.chiba-u.jp/da/curator/104178/
フルテキストへのリンク
https://opac.ll.chiba-u.jp/da/curator/104178/BA71319447-10-P091.pdf
公開者
Chiba University. Center for Environmental Remote Sensing
公開者の別表記
千葉大学環境リモートセンシング研究センター
NII資源タイプ
会議発表用資料
NCID
BA71319447
掲載誌名
Proceedings of the CEReS international symposium = CEReS国際シンポジウム資料集
巻
10
開始ページ
91
終了ページ
99
刊行年月
2005-02-17
著者版フラグ
publisher
カテゴリ
環境リモートセンシング研究センター「CEReSシンポジウム資料集」
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コンテンツの種類
会議発表用資料 Presentation
DCMI資源タイプ
text
ファイル形式 [IMT]
application/pdf
言語 [ISO639-2]
eng
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