Tree-ring oxygen isotope across monsoon Asia: Common signal and local influence
Tree-ring oxygen isotope across monsoon Asia: Common signal and local influence
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亚洲季风树轮氧同位素：共同信号和局部影响
DOI：
10.1016/j.quascirev.2021.107156
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发表时间：
2021-10
影响因子：
4
通讯作者：
Zhengtang Guo
中科院分区：
文献类型：
--
作者：
Chenxi Xu;Qingyu Zhao;Wenling An;Simon Wang;Ning Tan;Masaki Sano;Takeshi Nakatsuka;Krishna Borhara;Zhengtang Guo
季风亚洲（MA）树木年轮纤维素氧同位素（δ18O）受局地水文气候和远海-大气变化的共同影响。树木年轮δ18O的变化已被广泛用于定量重建季风降水、相对湿度和干旱严重程度。然而，局地水文气候和远地大尺度环流对树木年轮δ18O的影响尚未完全解决。本文收集了1884-1999年的24个年轮δ18O年代学资料，并用主成分分析方法研究了这些年代学的共同信号。24个树轮δ18O年代学的第一主成分（PC1）解释了25.2%的总方差，并与观测到的亚洲夏季风氧同位素指数（r = 0.69）呈显著正相关（r = 0.69），表明MA存在降水δ18O的共同信号，且与El Niño-Southern涛动（ENSO） （r = 0.72）和南亚夏季风降水（r = - 0.66）高度相关。南亚夏季风降水和ENSO是控制MA树轮δ18O共同信号的主要因素。MA树木年轮δ18O年代学的PC1也与大西洋多年代际涛动（太平洋年代际涛动）呈负（正）相关，表明大尺度环流的影响。然而，在去除大尺度环流对树木年轮δ18O年代学的影响后，剩余树木年轮δ18O年代学与区域水文气候呈负相关，突出了局部水文气候对单个树木年轮δ18O变化的作用。
Tree-ring cellulose oxygen isotope (δ18O) in monsoon Asia (MA) is affected collectively by local hydroclimate and remote oceanic-atmospheric variations. Variations of tree-ring δ18O have been widely used for quantitative reconstructions of monsoon-season precipitation, relative humidity and drought severity. However, local hydroclimate and remote large-scale circulation's influences on tree-ring δ18O has not been fully resolved. Here, we collected 24 tree-ring δ18O chronologies covering the period of 1884–1999 across a wide range of MA and investigated the common signals of these chronologies using principal component analysis. The first principal component (PC1) of the 24 tree-ring δ18O chronologies explained 25.2% of the total variances and showed significant positive correlations with the observed Asian summer monsoon oxygen isotope index (r = 0.69) during the period of 1978–1999, suggesting that a common signal of precipitation δ18O does exist in MA and that it is highly correlated with El Niño–Southern Oscillation (ENSO) (r = 0.72) and the South Asian summer monsoon precipitation (r = −0.66). South Asian summer monsoon precipitation and ENSO are the main factors controlling this common signal of tree-ring δ18O across MA. PC1 of tree-ring δ18O chronologies in MA also depicted a negative (positive) correlation with the Atlantic Multidecadal Oscillation (Pacific Decadal Oscillation), indicating the large-scale circulation influences. After removing the large-scale circulation influences on tree-ring δ18O chronologies, however, the residual tree-ring δ18O chronologies exhibit negative correlations with the regional hydroclimate, highlighting the role local hydroclimate on the individual tree-ring δ18O variations.
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影响因子：
5.8
作者：
Zhen Li;Zhongwei Yan;Yani Zhu;N. Freychet;S. Tett
通讯作者：
Zhen Li;Zhongwei Yan;Yani Zhu;N. Freychet;S. Tett
青藏高原东南部藏沙棘和冷杉树轮纤维素氧同位素采样策略及气候意义
影响因子：
3.2
作者：
Xu Chenxi;Zhu Haifeng;Nakatsuka Takeshi;Sano Masaki;Li Zhen;Shi Feng;Liang Eryuan;Guo Zhengtang
通讯作者：
Guo Zhengtang
近500年中国5-9月降水场的多代理重建
影响因子：
4.3
作者：
Shi Feng;Zhao Sen;Guo Zhengtang;Goosse Hugues;Yin Qiuzhen
通讯作者：
Yin Qiuzhen
中国东南部树轮δ18O揭示季风降水和ENSO变化
DOI：
10.1016/j.palaeo.2020.109954
发表时间：
2020-11
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
Shiyuan Shi;Jiangfeng Shi;Chenxi Xu;Steven W. Leavitt;William E. Wright;Zhongyin Cai;Hongyan Zhang;Xuguang Sun;Yesi Zhao;Xiaoqi Ma;Weijie Zhang;Huayu Lu
通讯作者：
Huayu Lu
DOI：
10.1016/j.palaeo.2013.06.025
发表时间：
2013-09
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
Chenxi Xu;M. Sano;T. Nakatsuka
通讯作者：
Chenxi Xu;M. Sano;T. Nakatsuka