印度尼西亚季节降水同位素变率特征

IF 0.6 Q4 WATER RESOURCES
H. A. Belgaman, K. Ichiyanagi, Rusmawan Suwarman, M. Tanoue, E. Aldrian, Arika I.D. Utami, S. D. A. Kusumaningtyas
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引用次数: 15

摘要

以往对印度尼西亚降水同位素(δ18O和δD)基于低空间分辨率观测数据集的研究发现了其季节变化的几种类型。本研究对印度尼西亚进行了高空间分辨率降雨采样,研究了降水同位素的时间特征。每周从印度尼西亚的33个站点收集降雨样本。聚类分析表明,根据δ18O降水的季节变化,印度尼西亚可分为4种类型。大部分台站δ18O的变率具有季节特征,在旱季(7 ~ 10月)δ18O值较高,为1型。2型站也有一个高δ18O峰值,但在较长时间内(6 - 11月)与1型站相似。印度尼西亚西北部地区,包括北、中苏门答腊和婆罗洲西部,被确定为3型,在1 - 2月和5 - 8月有两个高δ18O值峰值。另一种变异型为反季风型,表现为印尼东部5 - 7月δ18O低。亚洲-澳大利亚季风状态是控制季节δ18O变化的主要因素。研究表明,印尼降水稳定同位素可以对应于降水气候学。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Characteristics of seasonal precipitation isotope variability in Indonesia
The few previous studies of precipitation isotopes (δ18O 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 δ18O. The majority of stations showed seasonal patterns in the variability of δ18O, characterized by high values in the dry season (July–October) as type 1. Type 2 also showed one peak of high δ18O 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 δ18O values in January–February and May–August. Another pattern of variability was the anti-monsoonal type, indicated by low δ18O in May–July found in east part of Indonesia. Asia-Australia monsoon regime was the main factor that controls seasonal δ18O variability. This research showed that stable isotope in precipitation could correspond to precipitation climatology in Indonesia.
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来源期刊
CiteScore
1.90
自引率
18.20%
发文量
9
审稿时长
10 weeks
期刊介绍: Hydrological Research Letters (HRL) is an international and trans-disciplinary electronic online journal published jointly by Japan Society of Hydrology and Water Resources (JSHWR), Japanese Association of Groundwater Hydrology (JAGH), Japanese Association of Hydrological Sciences (JAHS), and Japanese Society of Physical Hydrology (JSPH), aiming at rapid exchange and outgoing of information in these fields. The purpose is to disseminate original research findings and develop debates on a wide range of investigations on hydrology and water resources to researchers, students and the public. It also publishes reviews of various fields on hydrology and water resources and other information of interest to scientists to encourage communication and utilization of the published results. The editors welcome contributions from authors throughout the world. The decision on acceptance of a submitted manuscript is made by the journal editors on the basis of suitability of subject matter to the scope of the journal, originality of the contribution, potential impacts on societies and scientific merit. Manuscripts submitted to HRL may cover all aspects of hydrology and water resources, including research on physical and biological sciences, engineering, and social and political sciences from the aspects of hydrology and water resources.
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