代理表面法および濃度法による乾性沈着フラックスの比較

• 大石 興弘

  福岡県保健環境研究所

• 下原 孝章

  福岡県保健環境研究所

• 宇都宮 彬

  福岡県保健環境研究所

• 向井 人史

  国立環境研究所

• 畠山 史郎

  国立環境研究所

• 村野 健太郎

  国立環境研究所

書誌事項

タイトル別名

• A Comparison of Dry Deposition Measurement by the Surrogate and Concentration Methods.
• ダイリ ヒョウメンホウ オヨビ ノウドホウ ニ ヨル カンセイ チンチャク フ

抄録

Dry deposition fluxes were evaluated by both the surrogate and concentration methods from May 1995 to April 1996 at Dazaifu in Fukuoka. Dry deposition fluxes by the surrogate method were measured by the deposition amounts onto dry-surface and wet-surface in petri dishes exposed for one week interval. Dry deposition fluxes by the concentration method were estimated as the product of the atmospheric concentrations and deposition velocities. The atmospheric concentrations of components in the gas and particulate phases were measured by the filter pack method for one week interval.<BR>Annual dry deposition fluxes of SO₄^2--S, NO₃^--N and NH₄⁺-N by the surrogate method on dry-surface were 290, 59 and 33mg m^-2 year^-1, respectively and on wet-surface 1090, 140 and 630 mg m^-2 year^-1, respectively. Annual dry deposition fluxes of SO₄^2- and NH₄⁺ on wet-surface were larger than those on dry-surface, due to the dissolution of SO₂ and NH₃ in water.<BR>The annual mean concentrations of particulate SO₄^2- SO₄^2--S, NO₃^--N and NH₄⁺-N in air were 2.14, 0.72 and 1.89, μg m^-3, respectively, and those of gaseous SO₂-S, HNO₃-N and NH₃ -N were 6.48, 0.47 and 3.20 μg m^-3, respectively. Annual dry deposition fluxes by the concentration method were estimated to be 840 mgS m^-2year^-1 as (SO₄^2-+SO₂)-S, 550 mg N m^-2 year^-1 as (NO₃^- HNO₃)-N and 1500 mg N m^-2 year^-1 as (NH₄⁺+NH₃) N. Dry deposition fluxes from the gas phase were greater than those from the particulate phase.<BR>The dry deposition flux of SO₄^2--S by the surrogate method was similar to that by the concenration method, but the dry deposition fluxes of NO₃^--N and NH₄⁺-N by the surrogate method were less than those by the concentration method, due to bouncing off the surface by wind and volatilization. Dry deposition fluxes of Cl^-, Ca²⁺, Mg²⁺, K⁺ and Na⁺, all main components of coarse particles, determined by the surrogate method were similar to those estimated by the concentration method. The contribution of SO₄^2-, NO₃^- and NH4+ dry deposition to the total deposition were 47%, 62% and 76%, respectively.

収録刊行物

• 大気環境学会誌

  大気環境学会誌 33 (5), 273-283, 1998

  公益社団法人 大気環境学会

キーワード

• dry deposition flux
• surrogate method
• concentration method
• gas
• aerosol

詳細情報

• CRID: 1390282679594431872
• NII論文ID: 130004377227
• NII論文ID: 110003841137
• NII書誌ID: AN10512108
• DOI: 10.11298/taiki1995.33.5_273
• ISSN: 21854335
• ISSN: 13414178
• NDL書誌ID: 4551136
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4551136
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可