Srivastava, Pradeep and Kumar, Anil and Mishra, Akanksha and Meena, Narendra K. and Tripathi, Jayant K. and Sundriyal, Y. P. and Agnihotri, Rajesh and Gupta, Anil K. (2013) Early Holocene monsoonal fluctuations in the Garhwal higher Himalaya as inferred from multi-proxy data from the Malari paleolake. Quaternary Research , 80 (3). 447-458. ISSN 0033-5894

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Abstract

A 4.9-m-thick lake sequence, formed due to the landslide damming of a stream in the semiarid Garhwal Himalaya, was studied to understand past monsoonal variations in the region. The Optically Stimulated Luminescence (OSL) chronology indicates that the lake existed between similar to 12 and similar to 7 ka ago. Chronologically constrained trends of sand percent organic phosphorus (OP), apatite inorganic phosphorus (AIP) and parameters of environmental magnetism were measured in the paleolake profile. Measured proxies indicate that the Indian summer monsoon ameliorated in the early Holocene after 12 ka cooling, and it appears that all the proxies from the lake have captured this globally recognized early Holocene warming. Four phases of wet conditions (intensified monsoon) are recognized at similar to 11.5 lea, similar to 11-10.5 ka, similar to 10-9 ka and similar to 8-7 ka with maximum uncertainties of similar to 1000 years. The wet phases are characterized by high magnetic susceptibility, increased OP and reduced AIP. In an attempt to understand the primary forcing of the sharp fluctuations in monsoonal activity in the region, we show that changes in magnetic susceptibility match variations of residual atmospheric delta C-14, suggesting a role for solar variability as an explanation of climatic variability.

Item Type:	Article
Additional Information:	copyright for this article belongs to M/s Cambridge University Press (CUP) Elsevier
Subjects:	Geography, Physical Geology
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	19 Aug 2026 10:22
Last Modified:	19 Aug 2026 10:22
URI:	https://npl.csircentral.net/id/eprint/3287

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