Drought variations in the eastern part of northwest China over the past two centuries: evidence from tree rings

被引：106

作者：

Fang, Keyan ^{[1
,2
]}

Gou, Xiaohua ^{[1
]}

Chen, Fahu ^{[1
]}

Yang, Meixue ^{[3
]}

Li, Jinbao ^{[2
]}

He, Maosheng ^{[4
]}

Zhang, Yong ^{[1
]}

Tian, Qinghua ^{[1
]}

Peng, Jianfeng ^{[1
]}

机构：

[1] Lanzhou Univ, MOE Key Lab Western Chinas Environm Syst, Ctr Arid Environm & Paleoclimate Res CAEP, Lanzhou 730000, Peoples R China

[2] Columbia Univ, Lamont Doherty Earth Observ, Tree Ring Res Lab, Palisades, NY 10964 USA

[3] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China

[4] Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China

来源：

CLIMATE RESEARCH | 2009年 / 38卷 / 02期

基金：

美国国家科学基金会;

关键词：

Dendrochronology; PDSI; Asian monsoon; Northwest China; QILIAN MOUNTAINS; RECONSTRUCTION; PRECIPITATION; WIDTH; ENSO;

D O I：

10.3354/cr00781

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Drought reconstruction from 1794 to 2003 in the eastern part of NW China was developed by calibrating tree rings of Picea wilsonii on Xinglong Mountain with the Palmer drought severity index (PDSI). The reconstruction explains 40% of the actual PDSI variance during the period from 1951 to 2003. The most significant drought period over the reconstructed time span occurred during the 1920s to 1930s. The drought reconstructions show a climate transition in 1921 on a decadal scale and significant cyclic patterns that were identified in intervals of 10.5, 7.9-8.3, -3.5, 3.0-3.2, 2.7-2.8 and -2 yr. This reconstruction is representative of regional drought patterns in eastern NW China and demonstrates that they are different from patterns in western NW China.

引用

页码：129 / 135

页数：7

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