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Moisture and vegetation variations in the extremely cold-dry area of the Tibetan Plateau during the past 5000 years
Xu, Teng1,4; Zhu, Liping1,2,4; Ma, Qingfeng1; Wang, Junbo1,2; Lu, Xinmiao1,2; Tang, Lingyu(唐领余)3
2021-09-01
Source PublicationCATENA
ISSN0341-8162
Volume204Pages:10
Abstract

Climate change on the Tibetan Plateau (TP) and its response to the atmosphere circulation has been widely concerned. The extremely cold-dry area of the central-northern TP is vulnerable and particularly sensitive to the variations of Indian Summer Monsoon (ISM) and the Westerlies. However, records from the central-northern TP are still scarce, limiting our understanding of the natural variability of climate on the TP and its response to the atmosphere circulation. Here we present a high resolution palynological record from Buruo Co covering the last 5000 years. The palynological assemblage shows that the Artemisia-steppe predominated the Buruo Co region until it was replaced by the alternant domination of steppe and desert since 900 cal a BP. Our results show that the central-northern TP experienced relatively warm and humid conditions reflected by Artemisia-steppe before 3800 cal a BP linked with stronger ISM. And then, the vegetation variation reveals a stepwise long-term aridification on the central-northern TP, which was influenced by the gradually weakened ISM during 3800-3200 cal a BP. Subsequently, the strengthened dry Westerlies dominated this region since 3200 cal a BP. After 1000 cal a BP, the Buruo Co might slightly expanded, but the catchment still maintained relatively dry conditions, even though this region probably received small amount of external moisture supply under the low evaporation conditions. Besides, four drought intervals (4400-4100, 3850-3650, 3300-3000 and 1900-1400 cal a BP) and two relatively cold periods (3200-2800 and 400 cal a BP-Present) were detected. The climate and vegetation variations since mid-Holocene on the central-northern TP were mainly controlled by the summer insolation at 30 degrees N and the solar activity. Also, it was associated with the position of Intertropical Convergence Zone and the climate oscillations of the North Atlantic mediated by the synergistic effect of ISM and the Westerlies.

KeywordPollen analysis Paleoenvironment Climate change Westerlies Mid-Holocene
DOI10.1016/j.catena.2021.105381
Indexed BySCI
Language英语
WOS KeywordRADIOCARBON AGE CALIBRATION ; NORTH-ATLANTIC CLIMATE ; ARID CENTRAL-ASIA ; HOLOCENE VEGETATION ; SUMMER MONSOON ; QAIDAM BASIN ; ATMOSPHERIC CIRCULATION ; ENVIRONMENTAL-CHANGES ; PALYNOLOGICAL RECORD ; SEDIMENT RECORD
Funding ProjectSecond Tibetan Plateau Scientific Expedition and Research (STEP)[2019QZKK0202] ; NSFC[41831177] ; CAS Strategic Priority Research Program[XDA20020102] ; China Scholarship Council (CSC)[201904910335]
WOS Research AreaGeology ; Agriculture ; Water Resources
WOS SubjectGeosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS IDWOS:000657369600009
Funding OrganizationSecond Tibetan Plateau Scientific Expedition and Research (STEP) ; NSFC ; CAS Strategic Priority Research Program ; China Scholarship Council (CSC)
PublisherELSEVIER
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/38295
Collection中国科学院南京地质古生物研究所
Corresponding AuthorXu, Teng; Zhu, Liping
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res ITP, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Nanjing Inst Geol & Paleontol, Nanjing 210008, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xu, Teng,Zhu, Liping,Ma, Qingfeng,et al. Moisture and vegetation variations in the extremely cold-dry area of the Tibetan Plateau during the past 5000 years[J]. CATENA,2021,204:10.
APA Xu, Teng,Zhu, Liping,Ma, Qingfeng,Wang, Junbo,Lu, Xinmiao,&Tang, Lingyu.(2021).Moisture and vegetation variations in the extremely cold-dry area of the Tibetan Plateau during the past 5000 years.CATENA,204,10.
MLA Xu, Teng,et al."Moisture and vegetation variations in the extremely cold-dry area of the Tibetan Plateau during the past 5000 years".CATENA 204(2021):10.
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