Arid
DOI10.1016/j.revpalbo.2006.10.005
Vegetation history and palaeoclimate of the past 30 kyr in Pakistan as inferred from the palynology of continental margin sediments off the Indus Delta
Ansari, Murtaza H.; Vink, Annemiek
通讯作者Vink, Annemiek
来源期刊REVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN0034-6667
出版年2007
卷号145期号:3-4页码:201-216
英文摘要

Palynological investigations on a continuous uppermost Pleistocene to Holocene high-resolution gravity core collected from the continental margin off the Indus Delta provide the first, uninterrupted, 30-kyr-long record of vegetation history and palaeoclimate of the Pakistan hinterland. Core analysis and interpretation allows the recognition of (1) greater glacial aridity than during the following postglacial period up to the present day; (2) a significant southward extension of the Himalayan sub-alpine and deciduous hardwood tree zone during the time interval from the Last Glacial Maximum (LGM) to the Younger Dryas cold interval; (3) extreme aridity and climatic deterioration during the LGM and the equivalent to Heinrich event 1; (4) a marked change to early Holocene humid conditions, starting already during the Bolling/Allerod and increasing abruptly during the Preboreal period; and (5) a gradual reduction of humidity from the middle Holocene to the present. These results are in general agreement with palaeoclimatic reconstructions based on multiple proxies from the Indian subcontinent as well as the Arabian Sea, and especially confirm the occurrence of a clear precipitation maximum in Pakistan between ca. 9 and 7 cal. kyr BP which probably resulted from a combination of increased and prolonged summer (SW) monsoonal strength; both processes ultimately being controlled by orbital changes in northern hemisphere summer insolation and shifts in the position of the Intertropical Convergence Zone. (c) 2006 Elsevier B.V. All rights reserved.


英文关键词Pakistan late Quaternary marine palynology vegetation reconstruction palaeoclimate middle Holocene precipitation optimum
类型Article
语种英语
国家Germany ; Pakistan
收录类别SCI-E
WOS记录号WOS:000247772200002
WOS关键词OXYGEN MINIMUM ZONE ; NORTHEASTERN ARABIAN SEA ; CLIMATE-CHANGE ; THAR DESERT ; LAMINATED SEDIMENTS ; NORTHWESTERN INDIA ; MARINE-SEDIMENTS ; MODERN POLLEN ; SOUTH-INDIA ; ICE-CORE
WOS类目Plant Sciences ; Paleontology
WOS研究方向Plant Sciences ; Paleontology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/155882
作者单位(1)Bundesanstalt Geowissensch & Rohstoffe, D-30655 Hannover, Germany;(2)Natl Inst Oceanog, Karachi 75600, Pakistan
推荐引用方式
GB/T 7714
Ansari, Murtaza H.,Vink, Annemiek. Vegetation history and palaeoclimate of the past 30 kyr in Pakistan as inferred from the palynology of continental margin sediments off the Indus Delta[J],2007,145(3-4):201-216.
APA Ansari, Murtaza H.,&Vink, Annemiek.(2007).Vegetation history and palaeoclimate of the past 30 kyr in Pakistan as inferred from the palynology of continental margin sediments off the Indus Delta.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,145(3-4),201-216.
MLA Ansari, Murtaza H.,et al."Vegetation history and palaeoclimate of the past 30 kyr in Pakistan as inferred from the palynology of continental margin sediments off the Indus Delta".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 145.3-4(2007):201-216.
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