土壌からの水銀発生量とその変動要因

• 丸本 幸治

  国立水俣病総合研究センター

• 坂田 昌弘

  静岡県立大学環境科学研究所

書誌事項

タイトル別名

• Mercury emission fluxes from soil surfaces and factors affecting their variations
• ドジョウ カラ ノ スイギン ハッセイリョウ ト ソノ ヘンドウ ヨウイン

抄録

To investigate soil-air surface exchange of mercury, we observed mercury emission fluxes from soil surfaces at two open-field sites and a forest site using a flux chamber method. In addition, we carried out laboratory experiments in which factors affecting mercury fluxes were controlled. The field observations showed that the mercury fluxes increased with increasing soil surface temperatures and solar radiation. From the laboratory experiments, it was clear that soil moisture content affects the variations in mercury fluxes, which are dependent on soil types. Also, it was inferred that organic carbon content of soil affects the mercury fluxes from soils. Based on the field and laboratory experiments, we found the mercury fluxes at the forest site can be estimated approximately from the single parameter of soil surface temperature. The estimated annual mercury emission flux (40 μg m^-2) at the study forest site has been comparable to the current mercury deposition fluxes (10-26 μg m^-2) in Japan. This suggests that soil-air surface exchange of mercury is an important process governing the dynamics of atmospheric mercury in Japan.

収録刊行物

• 地球化学

  地球化学 39 (4), 183-196, 2005

  一般社団法人日本地球化学会

キーワード

• Mercury
• Air/soil exchange
• Meteorological parameters
• Soil moisture content
• Organic carbon

詳細情報

• CRID: 1390282680719112320
• NII論文ID: 110008680104
• NII書誌ID: AN00141280
• DOI: 10.14934/chikyukagaku.39.183
• ISSN: 21885923
• ISSN: 03864073
• NDL書誌ID: 7789182
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7789182
• 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