DOI: 10.1007/s00531-012-0838-4
论文题名: Climate and environmental changes over the past 150 years inferred from the sediments of Chaiwopu Lake, central Tianshan Mountains, northwest China
作者: Ma L. ; Wu J. ; Abuduwaili J.
刊名: International Journal of Earth Sciences
出版年: 2013
卷: 102, 期: 3 起始页码: 959
结束页码: 967
语种: 英语
英文关键词: Chaiwopu Lake
; China
; Climate and environmental change
; Lake sediment
Scopus关键词: arid region
; climate variation
; environmental change
; lacustrine deposit
; Little Ice Age
; North Atlantic Oscillation
; paleoclimate
; paleotemperature
; regional climate
; sediment core
; temperature anomaly
; water vapor
; westerly
; Chaiwopu Lake
; China
; Tien Shan
; Xinjiang Uygur
英文摘要: We used a 55-cm sediment core from shallow Chaiwopu Lake in the central Tianshan Mountains of Xinjiang, northwest China, to investigate climate and environmental changes in this arid region over the past ~150 years. The core was dated using 137Cs. We compared temporal changes in several sediment variables with recent meteorological and tree-ring records. Organic matter had a positive correlation with the Palmer Drought Severity Index in the central Tianshan Mountains, and the δ13C of organic matter had a positive correlation with regional temperature. We applied constrained incremental sum-of-squares cluster analysis to element concentrations in the core and identified three distinct zones: (1) 55-46 cm, ~1860-1910, (2) 46-26 cm, ~1910-1952, and (3) 26-0 cm, 1952-present. Between 1880 and 1910 AD, following the Little Ice Age (LIA), the sediment environment was relatively stable, climate was cold and dry, and the lake water displayed high salinity, in contrast to conditions during the LIA. During the LIA, westerlies carried more water vapor into Central Asia when the North Atlantic Oscillation was in a negative phase, and encountered the enhanced Siberia High, which probably led to increased precipitation. In the period 1910-1950 AD, the lake was shallow and the regional climate was unstable, with high temperatures and humidity. In the last ~15-20 years, human activities caused an increase in sediment magnetic susceptibility, and heavy metal and total phosphorus concentrations in the sediment were substantially enriched. Mean annual temperature displays a warming trend over the past 50 years, and the lowest temperature was observed in the 1950s. There has been an increase in annual total precipitation since the 1990s. The combined influences of climate and human activity on the lake environment during this period were faithfully recorded in sediments of Chaiwopu Lake. This study provides a scientific basis for environmental management and protection. © 2012 Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84875398920&doi=10.1007%2fs00531-012-0838-4&partnerID=40&md5=940395510325b13daaba9a1b638ed5a6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70608
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China
Recommended Citation:
Ma L.,Wu J.,Abuduwaili J.. Climate and environmental changes over the past 150 years inferred from the sediments of Chaiwopu Lake, central Tianshan Mountains, northwest China[J]. International Journal of Earth Sciences,2013-01-01,102(3)