Observational Research on Stable Isotopes in Precipitation over Indonesian Maritime Continent

• BELGAMAN Halda A.

  Graduate School of Science and Technology, Kumamoto University Agency for Assessment and Application of Technology (BPPT), Indonesia

• ICHIYANAGI Kimpei

  Graduate School of Science and Technology, Kumamoto University Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

• TANOUE Masahiro

  Institute of Engineering Innovation, School of Engineering, The University of Tokyo

• SUWARMAN Rusmawan

  FITB, Bandung Institute of Technology (ITB), Indonesia

Bibliographic Information

Other Title

• インドネシア海大陸における降水の安定同位体の観察研究

Abstract

The Indonesian Maritime Continent (IMC) is located in the tropics and consists of a number of islands and seas. This particular arrangement of land masses and seas produces unique weather and climate characteristics. Various hydrometeorology studies have been conducted exploring the variability of stable isotopes in precipitation over the IMC. Stable isotopes (δ¹⁸O and δD) in precipitation can be used to obtain information about atmospheric processes (e.g., precipitation, temperature and hydrological cycle). The Global Network of Isotopes in Precipitation, operated by the International Atomic Energy Agency, has been conducting worldwide monthly surveys of isotope levels in precipitation since 1961. To better understand the isotopic variability in the IMC, the Japan Agency for Marine-Earth Science and Technology began operating in the IMC region in 2001. There are three types of seasonal variation of stable isotopes in precipitation, depending on the level of precipitation amount and also stable isotopic value, namely, semiannual, anti-monsoonal and monsoonal. Negative correlations between the precipitation amount and stable isotope value (amount effect) were identified when using the monthly averages. The interannual variability of stable isotopes in precipitation was mainly because of El Niño Southern Oscillation activity, whereas intraseasonal variability was closely related to the Madden-Julian Oscillation. Stable isotope variability in short periods was found to be due to precipitation cloud types and post-condensation processes.

Journal

• Journal of Japanese Association of Hydrological Sciences

  Journal of Japanese Association of Hydrological Sciences 46 (1), 7-28, 2016

  THE JAPANESE ASSOCIATION OF HYDOROLOGICAL SCIENCES

Keywords

• stable isotope
• precipitation
• Indonesian Maritime Continent
• ENSO
• MJO

Details

• CRID: 1390282679401636864
• NII Article ID: 130005143891
• NII Book ID: AA11123427
• DOI: 10.4145/jahs.46.7
• ISSN: 18837166
• ISSN: 13429612
• NDL BIB ID: 027251805
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027251805
• Web Site: https://www.jstage.jst.go.jp/article/jahs/46/1/46_7/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed