TY - JOUR
T1 - Increased Variability of Thailand's Chao Phraya River Peak Season Flow and Its Association With ENSO Variability
T2 - Evidence From Tree Ring δ18O
AU - Xu, Chenxi
AU - Buckley, Brendan M.
AU - Promchote, Parichart
AU - Wang, S. Y.Simon
AU - Pumijumnong, Nathsuda
AU - An, Wenling
AU - Sano, Masaki
AU - Nakatsuka, Takeshi
AU - Guo, Zhengtang
N1 - Funding Information:
We are most grateful for the helpful comments by the Editor and two anonymous reviewers that greatly improved our manuscript. This study is supported by the Strategic Priority Research Program of the Chinese Academy of Sciences, grants XDB26020000 and XDA13010106, the National Natural Science Foundation of China, grants 41672179, 41671193, 41630529, 41430531, 41690114, and 41888101, the Chinese Academy of Sciences (CAS) Pioneer Hundred Talents Program, and the National Key R&D Program of China, grants 2016YFA0600502 and 2017YFE0112800. B. M. Buckley was supported by funding from the US National Science Foundation (AGS 13‐ 03976 and AGS 16‐02629) and the Lamont‐Doherty Earth Observatory's Climate Center and Center for Climate and Life. This is Lamont contribution 8314. The tree ring‐based streamflow reconstruction data in this study are available from the NOAA Paleoclimatology Datasets (https:// www.ncdc.noaa.gov/paleo/study/ 26610).
Funding Information:
We are most grateful for the helpful comments by the Editor and two anonymous reviewers that greatly improved our manuscript. This study is supported by the Strategic Priority Research Program of the Chinese Academy of Sciences, grants XDB26020000 and XDA13010106, the National Natural Science Foundation of China, grants 41672179, 41671193, 41630529, 41430531, 41690114, and 41888101, the Chinese Academy of Sciences (CAS) Pioneer Hundred Talents Program, and the National Key R&D Program of China, grants 2016YFA0600502 and 2017YFE0112800. B. M. Buckley was supported by funding from the US National Science Foundation (AGS 13-03976 and AGS 16-02629) and the Lamont-Doherty Earth Observatory's Climate Center and Center for Climate and Life. This is Lamont contribution 8314. The tree ring-based streamflow reconstruction data in this study are available from the NOAA Paleoclimatology Datasets (https://www.ncdc.noaa.gov/paleo/study/26610).
Publisher Copyright:
©2019. American Geophysical Union. All Rights Reserved.
PY - 2019/5/16
Y1 - 2019/5/16
N2 - We present a statistically robust reconstruction of Thailand's Chao Phraya River peak season streamflow (CPRPF) that spans the 202 years from 1804 to 2005 CE. Our reconstruction is based on tree ring δ18O series derived from three Pinus merkusii sites from Laos and Thailand. The regional δ18O index accounts for 57% of the observed variance of CPRPF. Spatial correlation and 21-year running correlation analyses reveal that CPRPF is greatly influenced by regional precipitation variations associated with the El Niño–Southern Oscillation (ENSO). Periods of enhanced and reduced ENSO activity are associated with strong and weak ENSO-streamflow correlation, respectively. At the longer timescale, the Pacific Decadal Oscillation (PDO) appears to modulate the ENSO-streamflow correlations, with the most extreme flood events along the Chao Phraya River occurring during periods of increased frequency of La Niña events that coincide with extended cold phases of the PDO. The CPRPF reconstruction could aid management planning for Thailand's water resources.
AB - We present a statistically robust reconstruction of Thailand's Chao Phraya River peak season streamflow (CPRPF) that spans the 202 years from 1804 to 2005 CE. Our reconstruction is based on tree ring δ18O series derived from three Pinus merkusii sites from Laos and Thailand. The regional δ18O index accounts for 57% of the observed variance of CPRPF. Spatial correlation and 21-year running correlation analyses reveal that CPRPF is greatly influenced by regional precipitation variations associated with the El Niño–Southern Oscillation (ENSO). Periods of enhanced and reduced ENSO activity are associated with strong and weak ENSO-streamflow correlation, respectively. At the longer timescale, the Pacific Decadal Oscillation (PDO) appears to modulate the ENSO-streamflow correlations, with the most extreme flood events along the Chao Phraya River occurring during periods of increased frequency of La Niña events that coincide with extended cold phases of the PDO. The CPRPF reconstruction could aid management planning for Thailand's water resources.
KW - Asian Summer Monsoon
KW - Chao Phraya River streamflow reconstruction
KW - El Niño–Southern Oscillation
KW - Pacific Decadal Oscillation
KW - Pinus merkusii tree ring δO
KW - tropical dendroclimatology
UR - http://www.scopus.com/inward/record.url?scp=85065412422&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85065412422&partnerID=8YFLogxK
U2 - 10.1029/2018GL081458
DO - 10.1029/2018GL081458
M3 - Article
AN - SCOPUS:85065412422
SN - 0094-8276
VL - 46
SP - 4863
EP - 4872
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 9
ER -