Solar forcing of desert vegetation and drought frequency during the last 2700 years in the interior Qaidam Basin, northeastern Tibetan Plateau

doi:10.1007/s11430-019-9550-7

	Solar forcing of desert vegetation and drought frequency during the last 2700 years in the interior Qaidam Basin, northeastern Tibetan Plateau
	Li, Quan
刊名	SCIENCE CHINA-EARTH SCIENCES
	2020-04-01
卷号	63 期号:4 页码:561-574
关键词	Pollen Vegetation change Drought frequency Qaidam Basin Northeastern Tibetan Plateau
ISSN号	1674-7313
DOI	10.1007/s11430-019-9550-7
通讯作者	Li, Quan(liquan@igsnrr.ac.cn)
英文摘要	Knowledge of long-term change in vegetation and climate in semi-arid/arid regions is essential for the study of current climate and development of mitigation strategies against severe drought. Here, a fossil pollen record of annually-varved core from Sugan Lake in interior Qaidam Basin was quantitatively analyzed to reconstruct changes in vegetation, floristic diversity and drought frequency. Results of biomization suggested that regional vegetation was desert vegetation with three short-term occupations of temperate steppe/xerophytic shrub during the last 2700 years. Floristic diversity generally increased/decreased with the expansion/degradation of desert vegetation. Moisture fluctuations showed three distinct stages (extremely dry between 742BC and similar to AD500, relatively wet with an increasing trend between similar to AD500 and 1200 and relatively wet with frequent fluctuations after AD1200), interrupted by 14 drought events. Spectral analysis and continuous wavelet transform of moisture variation revealed 200- and 120-year cycles. According to cross-wavelet transform analysis, major drought frequency of similar to 200-year was explicitly correlated to solar activity. It's suggested that the centennial-scale drought frequency was mainly driven by solar activity, through modulation of large-scale atmospheric circulation. Furthermore, the effect of surface temperature-evaporation and uplifting/subsiding air flow should be notable. The climatic drought in interior Qaidam Basin could be intensified under the continuous global warming.
WOS关键词	ASIAN SUMMER MONSOON ; RESOLUTION POLLEN RECORD ; PALYNOLOGICAL RICHNESS ; ALPINE VEGETATION ; INDIAN MONSOON ; WESTERN TIBET ; SUGAN LAKE ; CLIMATE ; TEMPERATURE ; HOLOCENE
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000519897000007
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/133177]
专题	中国科学院地理科学与资源研究所
通讯作者	Li, Quan
作者单位	Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Li, Quan. Solar forcing of desert vegetation and drought frequency during the last 2700 years in the interior Qaidam Basin, northeastern Tibetan Plateau[J]. SCIENCE CHINA-EARTH SCIENCES,2020,63(4):561-574.
APA	Li, Quan.(2020).Solar forcing of desert vegetation and drought frequency during the last 2700 years in the interior Qaidam Basin, northeastern Tibetan Plateau.SCIENCE CHINA-EARTH SCIENCES,63(4),561-574.
MLA	Li, Quan."Solar forcing of desert vegetation and drought frequency during the last 2700 years in the interior Qaidam Basin, northeastern Tibetan Plateau".SCIENCE CHINA-EARTH SCIENCES 63.4(2020):561-574.