書誌事項
- タイトル別名
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- A Study on Chemical Components and Acidification Mechanism of Dew-Water.
- ロスイ ノ カガク ソセイ ト ソノ サンセイカ キコウ ニ カンスル ケンキュウ
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Dew-water was collected from 1995 to 1998 in Yokohama, Japan and analyzed for various chemical components. The frequency of dew events in 1998 was 22% and is the highest during the winter season. Precipitation resulting from dew was 7.7mm/year and corresponded to about 0.4% of that from rain (rain precipitation, 1901 mm) in Yokohama. The pH of dew-water ranged from 3.04 to 7.82 and the volumeweighted average pH was 5.08. Dew-water chemistry was characterized by a relatively high ion concentration compared to rain-and fog-water. The dew-water composition was strongly affected by aerosol and gaseous components, and therefore varied depending on the location where dew-water was collected.<BR>The dry deposition velocities of dew-water were estimated from the concentrations of dew-water components, gas and aerosol concentrations, dewfall, and the period between dew collector set up and dew collection by regression analysis. Dew-water was acidified primarily by nitric acid gas absorbed in dewwater. The deposition velocities of nitric acid gas and nitrate ion in aerosol were calculated to be 1.28cm s-1 and 0.11cm s-1, respectively, and estimated values from the atmospheric concentrations of gas and aerosol corresponded well with the measured values. The nitrate ion concentration in acidic dew-water differed slighty from the estimated value which may have been the result of dinitrogen pentaoxide gas absorption by the dew-water.
収録刊行物
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- 大気環境学会誌
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大気環境学会誌 35 (3), 158-169, 2000
公益社団法人 大気環境学会
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詳細情報 詳細情報について
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- CRID
- 1390001204618040320
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- NII論文ID
- 130004125874
- 110003841270
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- NII書誌ID
- AN10512108
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- ISSN
- 21854335
- 13414178
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- NDL書誌ID
- 5395836
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可