气候变化领域集成服务门户(CCPortal): Pollen-inferred climate changes and vertical shifts of alpine vegetation belts on the northern slope of the Nyainqentanglha Mountains (central Tibetan Plateau) since 8.4 kyr BP

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DOI	10.1177/0959683611400218
	Pollen-inferred climate changes and vertical shifts of alpine vegetation belts on the northern slope of the Nyainqentanglha Mountains (central Tibetan Plateau) since 8.4 kyr BP
	Li, Quan; Lu, Houyuan; Zhu, Liping; Wu, Naiqin; Wang, Junbo; Lu, Xinmiao
通讯作者	Li, Q (通讯作者)
发表日期	2011
ISSN	0959-6836
EISSN	1477-0911
起始页码	939
结束页码	950
卷号	21 期号:6
英文摘要	Fossil pollen from Nam Co and modern pollen from altitudinal vegetation belts around the lake are investigated to reveal alpine vegetation succession in response to climate changes during the Holocene in the central Tibetan Plateau. The discriminant analysis on 37 topsoil samples shows that pollen samples from alpine steppe at lower elevations (<4800 m) and alpine meadow on upper slopes (4800-5200 m) can be distinguished by their pollen assemblages. Samples from alpine steppe contain more Artemisia (25.1%) and Poaceae pollen (11.5%), whereas those from alpine meadow are dominated by Cyperaceae pollen (>60%). Our result indicates that the pollen ratio of Artemisia to Cyperaceae (A/Cy) can be used as an indicator of the vertical shift of vegetation belts and temperature changes in the central Tibetan Plateau as suggested by previous studies. A history of the vertical shift of vegetation belts on the northern slope of Nyainqentanglha Mountains and climate changes since 8.4 kyr BP are thus recovered by 198 fossil pollen assemblages from a 332 cm core of Nam Co. Paleovegetation reconstructed from fossil pollen assemblages through discriminant analysis shows a general downward shift of altitudinal vegetation belts, suggesting a decline in the temperature trend since 8.4 kyr BP. This result is consistent with the reduction of A/Cy ratios. The fossil pollen record also reveals warm and wet climate during the early to mid Holocene, and cold and dry conditions during the late Holocene in the Nam Co area. A comparison of Holocene climatic reconstructions across the Plateau indicates that termination of maximum moisture at around 6-5.5 kyr BP in our record is associated with the southeastward retreat of the Southwest Monsoon.
关键词	BASIN WESTERN TIBET NAM-CO ENVIRONMENTAL-CHANGES HYDROLOGICAL CHANGES ATLANTIC CLIMATE INDIAN MONSOON LAKE-SEDIMENTS HOLOCENE RECORD LACUSTRINE
英文关键词	discriminant analysis; Holocene; Nam Co; pollen analysis; Tibetan Plateau; vegetation belt
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000294043000005
来源期刊	HOLOCENE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257844
推荐引用方式 GB/T 7714	Li, Quan,Lu, Houyuan,Zhu, Liping,et al. Pollen-inferred climate changes and vertical shifts of alpine vegetation belts on the northern slope of the Nyainqentanglha Mountains (central Tibetan Plateau) since 8.4 kyr BP[J]. 中国科学院青藏高原研究所,2011,21(6).
APA	Li, Quan,Lu, Houyuan,Zhu, Liping,Wu, Naiqin,Wang, Junbo,&Lu, Xinmiao.(2011).Pollen-inferred climate changes and vertical shifts of alpine vegetation belts on the northern slope of the Nyainqentanglha Mountains (central Tibetan Plateau) since 8.4 kyr BP.HOLOCENE,21(6).
MLA	Li, Quan,et al."Pollen-inferred climate changes and vertical shifts of alpine vegetation belts on the northern slope of the Nyainqentanglha Mountains (central Tibetan Plateau) since 8.4 kyr BP".HOLOCENE 21.6(2011).