Meridional distributions of deuterium in atmospheric water vapour between tropical and southern polar latitudes
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概要
- 論文の詳細を見る
The temporal and spatial variations in the deuterium/hydrogen isotopic ratio of tropospheric water vapour in air masses circulating above the Southern Ocean and the Antarctic continental ice sheet were investigated during the summer season of the 36th Japanese Antarctic Research Expedition (JARE-36) from November 1994 to March 1995. The results of the deuterium analyses of air moisture samples are presented together with water, air and dew point temperatures as functions of latitude. A strong relationship between isotopic composition and latitude as well as corresponding temperatures was found in the region from 20°N to 60°S. Specific circumpolar, meridional and vertical atmospheric circulations and katabatic wind fields dominate in the Antarctic region, hence temperature dependences of the deuterium distribution in Antarctic water vapour are not significant during the short austral summer observation period. The deuterium distributions there are also different from the altitude and latitude effects which are typically for lower latitudes. Furthermore, it is shown that the isotopic composition of air moisture collected at higher latitudes is strongly affected by condensation and precipitation processes during transport, rather than by the evaporation temperature in the source region.
- 国立極地研究所の論文
著者
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Kaneto Susumu
Japan Meteorological Agency
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Kaneto Susumu
Japan Meteorological Agency Antarctic Office:(present Affiliation)sapporo District Meteorological Ob
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Schwarz G
Alfred Wegener Institute For Polar And Marine Research Research Unit Potsdam
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Kowski Peter
Umweltforschungszentrum Leipzig-Halle
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Gernandt Hartwig
Alfred Wegener Institute for Polar and Marine Research, Research Unit Potsdam
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Schwarz Guenter
Alfred Wegener Institute for Polar and Marine Research, Research Unit Potsdam
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Gernandt Hartwig
Alfred Wegener Institute For Polar And Marine Research
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Gernandt Hartwig
Alfred Wegener Institute For Polar And Marine Research Research Unit Potsdam
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Kowski P
Umweltforschungszentrum Leipzig-halle
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