Characteristics of seasonal precipitation isotope variability in Indonesia

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著者

    • Belgaman Halda A.
    • Graduate School of Science and Technology, Kumamoto University|Agency for the Assessment and Application of Technology (BPPT), Indonesia
    • Ichiyanagi Kimpei
    • Faculty of Advanced 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
    • Aldrian Edvin
    • Agency for the Assessment and Application of Technology (BPPT), Indonesia|Indonesian Agency for Meteorology, Climatology and Geophysics (BMKG), Indonesia
    • Utami Arika I.D.
    • Indonesian Agency for Meteorology, Climatology and Geophysics (BMKG), Indonesia

抄録

<p>The few previous studies of precipitation isotopes (δ<sup>18</sup>O and δD) in Indonesia, based on low spatial resolution observation datasets, have found several types of patterns in their seasonal variabilities. This study conducted high spatial resolution rainfall sampling and investigated the temporal characteristics of precipitation isotope in Indonesia. Rainfall samples were collected weekly from 33 stations in Indonesia. Cluster analysis showed that Indonesia could be divided into four types based on the seasonal variability of the precipitation of δ<sup>18</sup>O. The majority of stations showed seasonal patterns in the variability of δ<sup>18</sup>O, characterized by high values in the dry season (July–October) as type 1. Type 2 also showed one peak of high δ<sup>18</sup>O but in the longer period (June–November) was similar to type 1 stations. A region of Northwest Indonesia, comprising North and Central Sumatra and western Borneo, was identified as type 3, having two peaks of high δ<sup>18</sup>O values in January–February and May–August. Another pattern of variability was the anti-monsoonal type, indicated by low δ<sup>18</sup>O in May–July found in east part of Indonesia. Asia-Australia monsoon regime was the main factor that controls seasonal δ<sup>18</sup>O variability. This research showed that stable isotope in precipitation could correspond to precipitation climatology in Indonesia.</p>

収録刊行物

  • Hydrological Research Letters

    Hydrological Research Letters 11(2), 92-98, 2017

    水文・水資源学会/日本地下水学会/日本水文科学会/陸水物理研究会

各種コード

  • NII論文ID(NAID)
    130005562133
  • 本文言語コード
    JPN
  • データ提供元
    J-STAGE 
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