北極域における臭素および有機硫黄化合物の生物地球化学

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  • 亀山 宗彦
    北海道大学大学院地球環境科学研究院
  • 大木 淳之
    北海道大学大学院水産科学研究院 北海道大学北極域研究センター
  • 野村 大樹
    北海道大学大学院水産科学研究院 北海道大学北極域研究センター 北海道大学国際連携研究教育局（GI-CoRE）

書誌事項

タイトル別名
  • Biogeochemistry of bromine and organic sulfur compounds in the Arctic region
  • ホッキョクイキ ニ オケル シュウソ オヨビ ユウキ イオウ カゴウブツ ノ セイブツ チキュウ カガク

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<p>Since 1980’s many of atmospheric chemists observed the arctic surface atmosphere, and they concluded that ozone depletion in the arctic air in polar sunrise is caused by catalytic reaction of Br atom originated from the ocean. However, production processes of Br atom are not well known yet. Photolytic reaction at the surfaces of sea-salt and sea-ice is believed to be the main source of Br atom. Photolysis of organic bromine compounds such as bromoform (CHBr3) produced by macro algae and micro algae should contribute to the Br atom supply. Some studies proposed that CHBr3 is produced by abiotic reaction at the interface between sea-ice and snow on the sea ice. This review summarizes studies of ozone depleting Br compounds and introduce some recent studies concerning organic bromine compounds.</p><p>Also, an organic sulfur gas, dimethyl sulfide (DMS) plays potential roles in atmospheric chemistry and Earth’s climate. DMS is produced from the decomposition of dimethylsulfoniopropionate (DMSP), which is formed within marine algae cells. Recent climate changes, especially in the Arctic Ocean, induce transition of marine biota and its physiology, implying the production/consumption of the marine biogenic compounds will change following the climate change. Here, we also review sulfur cycle in the Arctic Ocean including sea ice zone.</p>

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  • 地球化学

    地球化学 53 (4), 159-171, 2019-12-25

    一般社団法人日本地球化学会

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