Open AccessA 177 Years Extended of Teak Chronology Revealing to the Climate Variability in Phrae Province, Northern of Thailand
Author(s) -
Kanokrat Buareal,
Supaporn Buajan,
Sineenart Preechamart,
Chotika Muangsong,
Nathsuda Pumijumg
Publication year - 2020
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.16
H-Index - 2
ISSN - 2287-0741
DOI - 10.35762/aer.2020.42.1.7
Subject(s) - chronology , dry season , proxy (statistics) , climatology , dendrochronology , monsoon , wet season , paleoclimatology , relative humidity , physical geography , geography , humidity , high resolution , environmental science , geology , climate change , archaeology , mathematics , meteorology , cartography , oceanography , statistics
Teak ring-width is one of the promising paleoclimate proxies in the tropical region. Tree-ring chronology spanning from 1840 to 2016 (177 years) was derived from seventy-six trees from Phrae Province, northern Thailand. A total of 141 core samples were cross-dated, a standardized master was constructed, and the tree residual master chronology was developed by ARSTAN program. The tree-ring chronology has a significant positive correlation with the monthly rainfall and relative humidity during the monsoon season (May - June). In addition, the growth of tree-ring width also significantly inversely correlated with Niño 3, Niño 3.4, and Niño 4 indices during the second half of the dry season (January - March). We reconstructed summer monsoon season (May - June) rainfall based on a linear regression model which explained 21.95% of the actual rainfall variance. The trend of the reconstructed rainfall record shows a decrease of 0.6 mm per decade and substantially showed four wet periods and five dry periods. These results suggest that this teak chronology has a good potential to be a high-resolution proxy for reconstructing the past local climate in northern Thailand.