Distribution of Oxygen Isotope Ratio of Precipitation in the Atlantic-Indian Sectors of the Southern Ocean

• Nakamura Kayo

  Institute of Low Temperature Science, Hokkaido University

• Aoki Shigeru

  Institute of Low Temperature Science, Hokkaido University

• Yoshimura Kei

  Atmosphere and Ocean Research Institute, The University of Tokyo

• Kurita Naoyuki

  Graduate School of Environmental Studies, Nagoya University

Abstract

Herein, the spatial distribution of stable oxygen isotope ratios (δ¹⁸O) of precipitation in the Atlantic to Indian sectors of the Southern Ocean is examined using the results of in situ observations and numerical modeling. In situ observations of 59 precipitation events reveal poleward decrease of δ¹⁸O, with a larger meridional gradient south of 60°S. Moreover, the estimates from the observations and model (IsoGSM) agree reasonably well, with a mean absolute difference of 4.3‰. Thus, the IsoGSM results generally support the observed poleward increase in the meridional gradient. These results will prove valuable in investigating the atmospheric water cycle and in studying oceanic processes of water mass formation and transport.

Journal

• SOLA

  SOLA 10 (0), 154-157, 2014

  Meteorological Society of Japan

Keywords

• Atmospheric Science

Details

• CRID: 1390001205222700800
• NII Article ID: 130004694332
• NII Article ID: 120005530833
• DOI: 10.2151/sola.2014-032
• ISSN: 13496476
• HANDLE: 2115/57809
• Web Site: https://www.jstage.jst.go.jp/article/sola/10/0/10_2014-032/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed