Vertical Distribution of Carbonyl Sulfide at Mt. Fuji, Japan |
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| Authors: | Hiromi Kato Yasuhito Igarashi Yukiko Dokiya Yoko Katayama |
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| Institution: | (1) Department of Environmental and Natural Resource Science, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu-shi Tokyo, 183-8509, Japan;(2) Atmospheric Environment and Applied Meteorology Research Department, Meteorological Research Institute, 1-1 Nagamine, Tsukuba Ibaraki, 305-0052, Japan;(3) Edogawa University, 474 Komaki, Nagareyama Chiba, 270-0198, Japan;(4) Present address: Department of Life Sciences, Graduate School of Life Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai Miyagi, 980-8577, Japan; |
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| Abstract: | Atmospheric carbonyl sulfide (COS) mixing ratios measured over 24 h during five summer campaigns (2003–2007) in a forest at
the foot of Mt. Fuji, Japan (35°21′ N, 138°43′ E; 1,300 m above sea level, a.s.l.) and at the summit (3,776 m a.s.l.) were
compared. COS levels were lower at the foot than at the summit during four out of five summer campaigns. The ratios of COS
mixing ratios at the foot of Mt. Fuji to those at the summit ranged from 0.7 to 0.9. These results provide evidence of biological
consumption of COS in the East Asian atmospheric boundary layer. We also measured the vertical profile of ambient COS below
the forest canopy. These data showed a clear gradient of COS mixing ratio: in the lowermost 1 m of the boundary layer, COS
mixing ratios decreased markedly downward. Two of the different kinds of vertical distribution of COS presented here support
the role of soil as a sink of atmospheric COS described by previous research using dynamic enclosure experiments. |
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