南極陸棚斜面横断東経115度ラインにおける酸素安定同位体比分布 [in Japanese] Distribution of oxygen stable isotope ratio along 115°E section across the continental slope of the Antarctica [in Japanese]
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Distribution of the oxygen isotope ratio δ^18 O was derived for the 115 ﾟE section across the continental slope of the Antarctica. Distinctly depleted δ^18 O was found on the shelf, revealing the diluting effect of glacial melt water. Salt budget and δ^18 O tendency in the seasonal mixed layer indicated that the near surface freshening was consistent with that due to the sea ice melt and the freshwater budget gave realistic thickness of the melted sea ice in this region, δ^18 O of the Adelie Land Bottom Water (ADLBW) was derived as -0.22‰, which was similar to that found for the bottom water in the Princess Elizabeth Trough (PETBW). This fact supports the idea of the dominant eastern source of the PETBW. The oxygen isotope data are important as a reference baseline for future oceanographic and climate variability, and hence sustained observations are crucial.
- Reports of Research Institute for Applied Mechanics,Kyushu University
Reports of Research Institute for Applied Mechanics,Kyushu University (135), 89-93, 2008-09
Research Institute for Applied Mechanics, Kyushu University