scholarly journals Tree-ring based drought reconstruction for the central Tien Shan area in northwest China

2006 ◽  
Vol 33 (7) ◽  
Author(s):  
Jinbao Li ◽  
Xiaohua Gou ◽  
Edward R. Cook ◽  
Fahu Chen
Keyword(s):  
Tree Ring ◽  
Northwest China ◽  
Tien Shan ◽  
Drought Reconstruction

A 225-year long drought reconstruction for east Xinjiang based on Siberia larch (Larix sibirica) tree-ring widths: Reveals the recent dry trend of the eastern end of Tien Shan

2015 ◽  
Vol 358 ◽  
pp. 42-47 ◽  
Author(s):  
Feng Chen ◽  
Yu-jiang Yuan ◽  
Shu-long Yu ◽  
Tong-wen Zhang ◽  
Hua-ming Shang ◽  
...  
Keyword(s):  
Tree Ring ◽  
Larix Sibirica ◽  
Tien Shan ◽  
Drought Reconstruction

scholarly journals A 422-Year Reconstruction of the Kaiken River Streamflow, Xinjiang, Northwest China

Atmosphere ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 1100
Author(s):  
Heli Zhang ◽  
Huaming Shang ◽  
Feng Chen ◽  
Youping Chen ◽  
Shulong Yu ◽  
...  
Keyword(s):  
Tree Ring ◽  
Regional Climate ◽  
Ring Width ◽  
Regional Climate Change ◽  
Northwest China ◽  
Tien Shan ◽  
The Past ◽  
Runoff Variation ◽  
Central Asian ◽  
Solar Influence

Our understanding of Central Asian historical streamflow variability is still limited because of short instrumental hydrologcial records. Based on tree-ring cores collected from three sampling sites in Kaiken River basin near Tien Shan, a regional tree-ring width chronology were developed. The correlation analysis showed that the runoff of Kaiken River from previous August to current June was significantly correlated with the regional chronology, and the high correlation coefficient was 0.661 (P < 0.01). Based on the regional chronology, the August-June runoff of Kaiken River has been reconstructed over the past 422 year, and it accounted for 43.7% of actual runoff variance during the common period 1983–2013. The reconstruction model is reliable, and the trend of observed and reconstructed data is relatively consistent. The results of multi-taper spectral analysis for the runoff reconstruction indicated some remarkable cycles for the past 422 years; the 11.5-year cycles correspond to the solar cycle and is found widely in runoff reconstructions in Central Asia. This may imply a solar influence on the hydroclimate variations of Tien Shan. The runoff reconstruction of Kaiken River compares well with runoff reconstructions the Urumqi River and Manas River, and implies that there is a common driving factor for the runoff in central Tien Shan, China. The analysis of linkages between climate variation and the runoff reconstruction of Kaiken River shows that there is a relationship between extremes in runoff variation and abnormal atmospheric circulations. Our 422-year steamflow reconstruction provides long-term perspective on current and 20th century hydrological events in central Tien Shan, is useful for aids sustainable water management and addresses regional climate change challenges.

Tree-ring based drought reconstruction at the northwestern margin of monsoon region of China since 1862

2013 ◽  
Vol 283 ◽  
pp. 93-97 ◽  
Author(s):  
Ruijie Lu ◽  
Shangyu Gao ◽  
Yajun Wang ◽  
Yuzhen Ma ◽  
Mingrui Qiang ◽  
...  
Keyword(s):  
Tree Ring ◽  
Monsoon Region ◽  
Northwestern Margin ◽  
Drought Reconstruction

scholarly journals Large-Scale Precipitation Variability over Northwest China Inferred from Tree Rings

2011 ◽  
Vol 24 (13) ◽  
pp. 3457-3468 ◽  
Author(s):  
Keyan Fang ◽  
Xiaohua Gou ◽  
Fahu Chen ◽  
Edward Cook ◽  
Jinbao Li ◽  
...  
Keyword(s):  
Tree Ring ◽  
Large Scale ◽  
Principal Component ◽  
Northwest China ◽  
Poor Quality ◽  
Contour Method ◽  
Precipitation Reconstruction ◽  
Nw China ◽  
Climate Station ◽  
Instrumental Records

Abstract A preliminary study of a point-by-point spatial precipitation reconstruction for northwestern (NW) China is explored, based on a tree-ring network of 132 chronologies. Precipitation variations during the past ~200–400 yr (the common reconstruction period is from 1802 to 1990) are reconstructed for 26 stations in NW China from a nationwide 160-station dataset. The authors introduce a “search spatial correlation contour” method to locate candidate tree-ring predictors for the reconstruction data of a given climate station. Calibration and verification results indicate that most precipitation reconstruction models are acceptable, except for a few reconstructions (stations Hetian, Hami, Jiuquan, and Wuwei) with degraded quality. Additionally, the authors compare four spatial precipitation factors in the instrumental records and reconstructions derived from a rotated principal component analysis (RPCA). The northern and southern Xinjiang factors from the instrumental and reconstructed data agree well with each other. However, differences in spatial patterns between the instrumentation and reconstruction data are also found for the other two factors, which probably result from the relatively poor quality of a few stations. Major drought events documented in previous studies—for example, from the 1920s through the 1930s for the eastern part of NW China—are reconstructed in this study.

scholarly journals Lower Moscovian limestones of the Bogdashan Range (NW China) as an indicator of cessation of arc magmatism in the Junggar region

2019 ◽  
Vol 27 (1) ◽  
pp. 57-78
Author(s):  
D. V. Alexeiev ◽  
Yu. S. Biske ◽  
A. V. Djenchuraeva ◽  
B. Wang ◽  
O. L. Kossovaya ◽  
...  
Keyword(s):  
Volcanic Rocks ◽  
Foreland Basin ◽  
Northwest China ◽  
Island Arc ◽  
Tien Shan ◽  
Lower Permian ◽  
Carbonate Sediments ◽  
Tropical Zone ◽  
Middle Carboniferous ◽  
Marine Facies

The field revision of the Carboniferous and Lower Permian stratigraphy of the northern Bogdashan (South Junggar, Northwest China) shows that the Lower to Middle Carboniferous island arc volcanic rocks, widely developed in this region, are overlapped everywhere by carbonate and terrigenous-carbonate sediments, containing occasional lava flows and overlain up the section by thick terrigenous series practically devoid of volcanic rocks. The deposition of limestone occurred at the stage of dying off of a volcanic arc, and the question of their age is of fundamental importance for dating this event. Carbonates are represented by facies of lagoons, shoals, and bioherms that formed on the leveled surface of the arc and on the slopes of the last active volcanoes. Bioherms are Waulsortian mounds and are mainly composed of algal limestones and carbonate mud. There are no framestones composed of corals and sponges (chaetetids) typical of the tropical zone. The facies of shallow crinoid-fusulinid limestones typical of the adjacent territories of the Southern Tien Shan and Tarim are poorly represented. Paleogeographically, the position of bioherms corresponds to the northern boundary of the realm of Pennsylvanian reefs. On the basis of foraminifers, brachiopods, and corals, the age of carbonates is early Moscovian (ca. 315–310 Ma). Cessation of island-arc volcanism, followed by the accumulation of limestone in Bogdashan, occurred sub-synchronously with formation of the West Junggar (Bayingou) suture and may reflect docking of the Bogdashan arc to the Yili active margin of the Kazakhstan continent. Further subsidence of Bogdashan and adjacent regions of the Junggar and Turfan basins, which was somewhat slower at the end of the Carboniferous and more intense in the Early and Middle Permian, may reflect the development of the foreland basin that formed along the northern flank of the Tien Shan orogen. Marine facies were locally preserved in this basin until the Artinskian (ca. 285 Ma), and later the Junggar and Turfan basins lost connection to the ocean and developed in continental environments.

Assessing the influences of tree species, elevation and climate on tree-ring growth in the Qilian Mountains of northwest China

Trees ◽  
2015 ◽  
Vol 31 (2) ◽  
pp. 393-404 ◽  
Author(s):  
Linlin Gao ◽  
Xiaohua Gou ◽  
Yang Deng ◽  
Meixue Yang ◽  
Fen Zhang
Keyword(s):  
Tree Ring ◽  
Tree Species ◽  
Northwest China ◽  
Qilian Mountains ◽  
The Qilian Mountains

scholarly journals Tree-Ring Based Drought Reconstruction (A.D. 1855–2001) for the Qilian Mountains, Northwestern China

2007 ◽  
Vol 63 (1) ◽  
pp. 27-36 ◽  
Author(s):  
Qinhua Tian ◽  
Xiaohua Gou ◽  
Yong Zhang ◽  
Jianfeng Peng ◽  
Jinsong Wang ◽  
...  
Keyword(s):  
Tree Ring ◽  
Qilian Mountains ◽  
Northwestern China ◽  
Drought Reconstruction ◽  
The Qilian Mountains
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