Assessment of sungkai tree-ring d18O proxy for paleoclimate reconstruction in western Java, Indonesia
Assessment of sungkai tree-ring d18O proxy for paleoclimate reconstruction in western Java, Indonesia
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印度尼西亚西爪哇古气候重建的宋凯树轮 d18O 代理评估
DOI：
10.1016/j.quaint.2015.03.038
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发表时间：
2015
影响因子：
2.2
通讯作者：
T. Tagami
中科院分区：
文献类型：
--
作者：
M. Harada;Y. Watanabe;T. Nakatsuka;S.Tazuru-Mizuno;Y. Horikawa;B. Subiyanto;J. Sugiyama;T. Tsuda;T. Tagami
为了评估松凯δ 18 O作为古气候代用指标的可重复性，我们测量了与以前研究相同地区的两棵松凯树的δ 18 O年变化。两个松凯δ 18 O值的变化具有显著的相关性（r= 0.80;P< 0.001），并与前期分析结果相关，表明外界气候因素影响松凯δ 18 O值。松开南7号的δ 18 O年变化与温度、日照时数、气压呈显著正相关。与相对湿度和SOI呈显著负相关。1997-1998年厄尔尼诺事件严重干旱期间δ 18 O的季节变化表明，δ 18 O最大值出现在1997年晚木前后，对应于降水/相对湿度最小值，对应于温度/日照时数/气压最大值，但有相当长的时间滞后。
To assess the reproducibility of sungkai δ18O as paleoclimate proxies, we measured annual δ18O variations of two sungkai trees that had been collected in the same area as in a previous study. Two sungkai δ18O variations showed significant mutual correlation (r= 0.80;P< 0.001) and correlation with results of earlier analyses, suggesting that external climatic factors affect the δ18O values of sungkai. The annual δ18O of SungkaiNAN7 shows significant, positive correlation with temperature, sunlight hours, and air pressure. It shows significant, negative correlation with relative humidity and SOI. Moreover, the seasonal δ18O variation acquired during severe drought of the 1997–1998 El Niño event shows that the maximum δ18O value around 1997 latewood corresponds to the rainfall/relative humidity minimum and corresponds to the temperature/sunlight hours/air pressure maximum with a considerable time lag.