Climate variability over the past 100 years in Myanmar derived from tree-ring stable oxygen isotope variations in Teak

Nathsuda Pumijumnong*, Chotika Muangsong, Supaporn Buajan, Masaki Sano, Takeshi Nakatsuka

*この研究の対応する著者

研究成果: Article査読

9 被引用数 (Scopus)

抄録

We present a 100-year oxygen isotope record from teak tree-ring cellulose (δ18O), originating from a site in southern Myanmar that preserves the isotopic ratios of the regional wet season’s rainfall. Tree-ring δ18O correlates strongly with regional rainfall during the months of May to October (r = − 0.353, p < 0.01). We found the tree-ring δ18O had clear signals of the June to September Indian Summer Monsoon (ISM) over the years 1948–1998 (r = − 0.53, p < 0.01). The δ18O has a significant and negative correlation with the minimum temperature in September and has a significant positive correlation with maximum temperature in November and December. The study found that δ18O has a significant positive correlation with the difference between the maximum temperature and the minimum temperature (DTR) in August to October. Based on our results, it can be concluded that tree-ring δ18O in teak in southern Myanmar is controlled by the amount of rainfall during the monsoon season and the temperature in the November and December. Spatial correlation and spectral analyses revealed a strong impact of the El Niño-Southern Oscillation (ENSO) on tree-ring δ18O of teak. In addition, tree-ring δ18O also captures the signal of the Indian Ocean Dipole (IOD).

本文言語English
ページ(範囲)1401-1414
ページ数14
ジャーナルTheoretical and Applied Climatology
139
3-4
DOI
出版ステータスPublished - 2020 2月 1

ASJC Scopus subject areas

  • 大気科学

フィンガープリント

「Climate variability over the past 100 years in Myanmar derived from tree-ring stable oxygen isotope variations in Teak」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル