Publication: A tree-ring cellulose d18O-based July–October precipitation reconstruction since AD 1828, northwest Thailand
Accepted Date
2015-02-28
Issued Date
2015-10
Resource Type
Language
eng
ISSN
0022-1694
Rights
Mahidol University.
Rights Holder(s)
Elsevier
Bibliographic Citation
Journal of Hydrology. Vol.259, No.P2 (2015), 433-441.
Suggested Citation
Chenxi Xu, Nathsuda Pumijumnong, Takeshi Nakatsuka, Masaki Sano, Zhen Li, นาฎสุดา ภูมิจำนงค์ A tree-ring cellulose d18O-based July–October precipitation reconstruction since AD 1828, northwest Thailand. Journal of Hydrology. Vol.259, No.P2 (2015), 433-441.. doi:10.1016/j.jhydrol.2015.02.037 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/48399
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Title
A tree-ring cellulose d18O-based July–October precipitation reconstruction since AD 1828, northwest Thailand
Abstract
A tree-ring d18O chronology for the period 1828–2000 was developed from four Pinus merkusii trees, to
find a reliable proxy for reconstructing precipitation in northwest Thailand. Inter-tree d18O correlations
were high during the entire period (r = 0.57–0.79). The tree-ring d18O chronology shows significant negative
correlations with regional July–October precipitation during the period 1901–2000 (r = 0.62) and
with July–October river flow (r = 0.54), and is in good agreement with a shorter tree-ring d18O chronology
from living Pinus kesiya in northwest Thailand. The spatial correlation analysis between tree-ring
d18O and regional July–October precipitation also support that the tree-ring d18O of P. merkusii is a
promising proxy to reconstruct precipitation in northwest Thailand. The tree-ring d18O-based July–
October reconstruction, which accounts for 37.6% of the precipitation variance, shows a close relationship
with El Niño–Southern Oscillation (ENSO) during the period 1871–2000, with the exception of during the
past two decades; the exception may be related to the southeastward shift of the descending limb of
Walker circulation and increased frequency of central Pacific ENSO.