Tree-ring oxygen isotope chronology of teak log coffins in northwestern Thailand and its relationship with Pacific Decadal Oscillation and El Niño-Southern Oscillation
Issued Date
2022-08-20
Resource Type
ISSN
10406182
Scopus ID
2-s2.0-85106678361
Journal Title
Quaternary International
Volume
629
Start Page
81
End Page
92
Rights Holder(s)
SCOPUS
Bibliographic Citation
Quaternary International Vol.629 (2022) , 81-92
Suggested Citation
Preechamart S., Pumijumnong N., Bräuning A., Muangsong C., Cai B., Payomrat P., Buajan S., Wang F., Li M. Tree-ring oxygen isotope chronology of teak log coffins in northwestern Thailand and its relationship with Pacific Decadal Oscillation and El Niño-Southern Oscillation. Quaternary International Vol.629 (2022) , 81-92. 92. doi:10.1016/j.quaint.2021.04.007 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/87136
Title
Tree-ring oxygen isotope chronology of teak log coffins in northwestern Thailand and its relationship with Pacific Decadal Oscillation and El Niño-Southern Oscillation
Other Contributor(s)
Abstract
We developed a stable oxygen isotope chronology of tree-ring alpha cellulose (δ18OTR) from archaeological teak (Tectona grandis L.f.) samples from Mae Hong Son (MHS) province, northwestern Thailand. The samples were collected from ancient coffins belonging to the log coffin culture excavated at the Ban Rai rock shelter (BR). The chronology spans a period of 283 years in the late Holocene (AD14–296). The oxygen isotopic composition of BR δ18OTR ranged from 21.15‰ to 26.31‰. Since δ18OTR variations in Thailand teak can be used as indicators for precipitation amount during the rainy summer monsoon season, our chronology can be used as a proxy for regional late Holocene hydroclimate variability. This is confirmed by a significant positive correlation of our BR δ18OTR record with a stalagmite δ18O record from Klang cave, southern Thailand (r = 0.303, p < 0.01). In addition, a REDFIT spectral analysis revealed the existence of multidecadal (26.9-year) and interannual (5.6, 3.4 and 2.8-year) cycles, which may potentially be the fingerprints of climate forcing mechanisms impacting Thailand monsoon precipitation, such as the Pacific Decadal Oscillation (PDO) and the El Niño-Southern Oscillation (ENSO).