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Stable Isotopes in Precipitation over Indonesia Maritime Continent

Abstract

Daily variability of stable isotopes in precipitation was observed at 6 stations in the Indonesian Maritime Continent from 2000 to 2006. The annual mean {delta}{sup 18}O at Bukit Kototabang (GAW), Jambi, and Makassar are heavier than those for others. The precipitation amount effect was observed only at Denpasar and Makassar. There are 2 groups resulting from the local Meteoric Water line; (1) slope is nearly 7.0 and high d-excess more than 10 at GAW, Denpasar, and Manado, (2) slope is around 7.4 and low d-excess less than 7.5 per mille at Jambi, Makassar, and Palau. Seasonal variability of {delta}{sup 18}O and d-excess were classified into three patterns. There are no seasonal variations in {delta}{sup 18}O and d-excess at GAW and Jambi, but clear seasonal variations at Denpasar (DPS) and Makassar (MKS). Due to the amount effect, {delta}{sup 18}O in precipitation is high when the precipitation amount is low from May to october. In contrast, the amount effect is not significant and d-excess is constant throughout the year in Manado and Palau. The {delta}{sup 18}O in precipitation at 2 stations located in sumatra Island corresponded with the Madden-Jullian Oscillation index, while those for the other 4 stations in more easterly locations  More>>
Authors:
Ichiyanagi, K.; [1]  Suwarman, R.; [2]  Yamanaka, M. D. [3] 
  1. Graduate School of Science and Technology, Kumamoto University, and Japan Agency for Marine-Earth Science and Technology (JAMSTEC) (Japan)
  2. Graduate School of Science and Technology, Kumamoto University (Japan)
  3. Japan Agency for Marine-Earth Science and Technology (JAMSTEC) (Japan)
Publication Date:
Jul 15, 2013
Product Type:
Conference
Report Number:
IAEA-CN-186/51
Resource Relation:
Conference: International Symposium on Isotopes in Hydrology, Marine Ecosystems and Climate Change Studies, Monaco (Monaco), 27 Mar - 1 Apr 2011; Other Information: 3 figs., 1 tab., 5 refs.; Related Information: In: Isotopes in Hydrology, Marine Ecosystems and Climate Change Studies. Vol. I. Proceedings of an International Symposium| 547 p.
Subject:
58 GEOSCIENCES; GROUND WATER; INDIAN OCEAN; INDONESIA; OXYGEN 18; PALAU; PRECIPITATION; SEASONAL VARIATIONS; WATER VAPOR
OSTI ID:
22122058
Research Organizations:
International Atomic Energy Agency, Department of Nuclear Sciences and Applications, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; ISBN 978-92-0-135610-9; TRN: XA13R0815078169
Availability:
Also available on-line: http://www-pub.iaea.org/MTCD/publications/PDF/Pub1580_vol1_web.pdf; Enquiries should be addressed to IAEA, Marketing and Sales Unit, Publishing Section, E-mail: sales.publications@iaea.org; Web site: http://www.iaea.org/books
Submitting Site:
INIS
Size:
page(s) 107-112
Announcement Date:
Aug 27, 2013

Citation Formats

Ichiyanagi, K., Suwarman, R., and Yamanaka, M. D. Stable Isotopes in Precipitation over Indonesia Maritime Continent. IAEA: N. p., 2013. Web.
Ichiyanagi, K., Suwarman, R., & Yamanaka, M. D. Stable Isotopes in Precipitation over Indonesia Maritime Continent. IAEA.
Ichiyanagi, K., Suwarman, R., and Yamanaka, M. D. 2013. "Stable Isotopes in Precipitation over Indonesia Maritime Continent." IAEA.
@misc{etde_22122058,
title = {Stable Isotopes in Precipitation over Indonesia Maritime Continent}
author = {Ichiyanagi, K., Suwarman, R., and Yamanaka, M. D.}
abstractNote = {Daily variability of stable isotopes in precipitation was observed at 6 stations in the Indonesian Maritime Continent from 2000 to 2006. The annual mean {delta}{sup 18}O at Bukit Kototabang (GAW), Jambi, and Makassar are heavier than those for others. The precipitation amount effect was observed only at Denpasar and Makassar. There are 2 groups resulting from the local Meteoric Water line; (1) slope is nearly 7.0 and high d-excess more than 10 at GAW, Denpasar, and Manado, (2) slope is around 7.4 and low d-excess less than 7.5 per mille at Jambi, Makassar, and Palau. Seasonal variability of {delta}{sup 18}O and d-excess were classified into three patterns. There are no seasonal variations in {delta}{sup 18}O and d-excess at GAW and Jambi, but clear seasonal variations at Denpasar (DPS) and Makassar (MKS). Due to the amount effect, {delta}{sup 18}O in precipitation is high when the precipitation amount is low from May to october. In contrast, the amount effect is not significant and d-excess is constant throughout the year in Manado and Palau. The {delta}{sup 18}O in precipitation at 2 stations located in sumatra Island corresponded with the Madden-Jullian Oscillation index, while those for the other 4 stations in more easterly locations did not. This finding indicates that water vapour evaporated from the Indian Ocean can reach the Island of sumatra, but can't reach more easterly locations. (author)}
place = {IAEA}
year = {2013}
month = {Jul}
}