Comparison of Sungkai Tree-Ring Components and Meteorological Data from Western Java, Indonesia

In order to explore the potential of tree-ring components as climate proxies in Asian tropical area, we performed a systematic comparison between temporal variations in meteorological data – precipitation, relative humidity and sunlight hours – and those in treering parameters – ring width, mean ear...

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Veröffentlicht in:Journal of disaster research 2013-02, Vol.8 (1), p.95-102
Hauptverfasser: YumikoWatanabe, Tamura, Shigeki, Nakatsuka, Takeshi, Tazuru, Suyako, Sugiyama, Junji, Subiyanto, Bambang, Tsuda, Toshitaka, Tagami, Takahiro
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Sprache:eng
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Zusammenfassung:In order to explore the potential of tree-ring components as climate proxies in Asian tropical area, we performed a systematic comparison between temporal variations in meteorological data – precipitation, relative humidity and sunlight hours – and those in treering parameters – ring width, mean earlywood vessel area and δ 18 O– in a sungkai disk collected from western Java, Indonesia. Ring width shows a significant positive correlation with precipitation in the last dry season prior to growth period. Ring width is also correlated inversely with sunlight hours in the last dry season. Mean earlywood vessel area shows a significant, positive correlation with precipitation and relative humidity during the rainy season of growth period. The δ 18 O and δ 13 C time series of alpha-cellulose samples, which divide each ring into three parts – earlywood, inner latewood and outer latewood – vary, furthermore, from 22‰ to 28‰ and from -28‰ to -24‰, respectively. δ 13 C results show distinct annual cycles, for which values of earlywood are highest, gradually followed by a decrease. Although δ 18 O has no such seasonal pattern, annual-averaged δ 18 O records show an inverse correlation with precipitation and relative humidity in the rainy season of growth period. As described above, multi-components of sungkai tree rings are expected to be useful in paleoclimate reconstruction on a seasonal scale.
ISSN:1881-2473
1883-8030
DOI:10.20965/jdr.2013.p0095