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Characteristics of seasonal precipitation isotope variability in Indonesia
Belgaman H.A.a,b, Ichiyanagi K.a,c, Suwarman R.d, Tanoue M.e, Aldrian E.b,f, Utami A.I.D.f, Kusumaningtyas S.D.A.f
a Graduate School of Science and Technology, Kumamoto University, Japan
b Agency for the Assessment and Application of Technology (BPPT), Indonesia
c Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Japan
d FITB, Bandung Institute of Technology (ITB), Indonesia
e Institute of Engineering Innovation, School of Engineering, The University of Tokyo, Japan
f Indonesian Agency for Meteorology, Climatology and Geophysics (BMKG), Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© The Author(s) 2017. The few previous studies of precipitation isotopes (δ 18 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 18 O. The majority of stations showed seasonal patterns in the variability of δ 18 O, characterized by high values in the dry season (July–October) as type 1. Type 2 also showed one peak of high δ 18 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 18 O values in January–February and May–August. Another pattern of variability was the anti-monsoonal type, indicated by low δ 18 O in May–July found in east part of Indonesia. Asia-Australia monsoon regime was the main factor that controls seasonal δ 18 O variability. This research showed that stable isotope in precipitation could correspond to precipitation climatology in Indonesia.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Amount effect,Indonesia,Observation data,Precipitation isotope,Seasonal variability[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]The authors wish to thank the Priority Organization for Innovation and Excellence, Kumamoto University. This research was supported partly by the Department of Coupled Ocean-Atmosphere-Land Processes (DCOP), JAMSTEC, for project research, and the Japan Society for the Promotion of Science (JSPS) KAKENHI (Grant Numbers: 24510256 and 16H05619).[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.3178/hrl.11.92[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]