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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Reconstruction of Last Glacial to early Holocene monsoon variability from relict lake sediments of the Higher Central Himalaya, Uttrakhand, India
Journal of Asian Earth Sciences, Volume 34, No. 3, Year 2009
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Description
Proglacial lake sediments at Goting in the Higher Central Himalaya were analyzed to reconstruct the summer monsoon variability during the Last Glacial to early Holocene. Sedimentary structures, high resolution mineral magnetic and geochemical data suggest that the lacustrine environment experienced fluctuating monsoonal conditions. Optically stimulated luminescence (OSL) dating indicates that the lake sedimentation occurred before 25 ka and continued after 13 ka. During this period, Goting basin witnessed moderate to strengthened monsoon conditions around 25 ka, 23.5 ka-22.5 ka, 22 ka-18 ka, 17 ka-16.5 ka and after14.5-13 ka. The Last Glacial phase ended with the deposition of outwash gravel dated at ∼11 ka indicating glacial retreat and the onset of Holocene condition. Additionally, centennial scale fluctuations between 16.5 ka and 12.7 ka in the magnetic and geochemical data are seen. A close correspondence at the millennial scale between our data and that of continental and marine records from the Indian sub-continent suggests that Goting basin responded to periods of strengthened monsoon during the Last Glacial to early Holocene. We attribute the millennial scale monsoon variability to climatic instability in higher northern latitudes. However, centennial scale abrupt changes are attributed to the result of albedo changes on the Himalaya and Tibetan plateau. © 2008 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Basavaiah, Nathani
India, Mumbai
Indian Institute of Geomagnetism
Jain, Mayank
Denmark, Lyngby
Technical University of Denmark
Singhvi, Ashok Kumar
India, Ahmedabad
Physical Research Laboratory India
Statistics
Citations: 113
Authors: 3
Affiliations: 4
Identifiers
Doi:
10.1016/j.jseaes.2008.07.007
ISSN:
13679120
Research Areas
Environmental