CH4 flux in an alas ecosystem formed by forest disturbance near Yakutsk,Eastern Siberia,Russia |
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| Authors: | Tomoaki Morishita Ryusuke Hatano Roman V Desyatkin |
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| Institution: | 1. Graduate School of Agriculture , Hokkaido University , Sapporo, 060-8589, Japan;2. Graduate School of Agriculture , Hokkaido University , Sapporo, 060-8589, Japan;3. Field Science Center for Northern Biosphere , Hokkaido University , Sapporo, 060-8589, Japan;4. Institute of Biological Problems of Cryolithzone, Russian Academy of Sciences , Yakutsk, 677891, Republic of Sakha, Russia |
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| Abstract: | Abstract Quartz and mica contents were determined as a function of particle size of soils over quartz and mica-free basalts in northwestern Kyushu and San-in. The contents of both minerals were much higher in the surface soil horizons than in the lower horizons. Quartz particle size distribution (predominantly 2 to 53 μm) and surface morphology (chip or shard, not euhedral) which are similar to those in the north central Pacific pelagic sediments and Hawaiian soils, indicated that quartz is added as aerosolic dust and loess carried by the circumpolar Westerly Winds from Asian semi-arid and arid regions. Close proximity to the eolian sources was deduced by somewhat coarser texture of the present soil quartz. Lower surface soil quartz content, relative to that in the Hawaiian soils was interpreted as indicating a younger landscape age caused by intensive denudation. The covariant relation between the quartz and miea eontents of soils may suggest that at least a portion of the micaceous minerals and quartz in Ando soils of Japan also has a tropospheric origin. |
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| Keywords: | Alas forest fire methane permafrost Taiga |
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