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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Spatial-temporal heterogeneity in a small lake and its implication for paleoclimate reconstruction

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Author(s):
Rawat, Suman [1] ; Gupta, Anil K. [2] ; Srivastava, Priyeshu [3] ; Sangode, S. J. [4] ; Jovane, Luigi [3]
Total Authors: 5
Affiliation:
[1] Wadia Inst Himalayan Geol, 33 GMS Rd, Dehra Dun 248001, Uttarakhand - India
[2] Indian Inst Technol, Dept Geol & Geophys, Kharagpur 721302, W Bengal - India
[3] Univ Sao Paulo, Inst Oceanog, Praca Oceanog 191, BR-05508120 Sao Paulo - Brazil
[4] Savitribai Phule Pune Univ, Dept Geol, Pune 411007, Maharashtra - India
Total Affiliations: 4
Document type: Journal article
Source: LIMNOLOGY; v. 23, n. 1 JUL 2021.
Web of Science Citations: 0
Abstract

Lakes provide continuous records of past regional and global climate. Most studies utilize single trench section dig from the lake shore margins or from single core in the central part/depocenter of the lakes for paleoclimate reconstruction. These reconstructions are based on the assumption of homogenous sedimentation across the lake. However, single core approach for paleoclimate reconstruction is often debated due to inter-site spatial and temporal variations in sedimentation and proxy responses. Therefore, in the present study, we explored the spatial-temporal heterogeneity in a small post-glacial lake of the Lahaul Himalaya and its influence on paleoclimate reconstruction. The depocenter of lake received similar to 2.5 times higher average sedimentation compared to the shore margin. Despite the distinct sedimentation rate in depocenter and shore margin, environmental magnetic and total organic carbon (TOC) records showed similar environmental signals over equivalent time periods. The depocenter core provided high-resolution lacustrine environment, whereas the marginal trench recorded major shifts in paleoclimate over a longer time scale. New multi-proxy data showed strengthened Indian summer monsoon (ISM) during medieval climate anomaly (MCA) and weakened ISM during little ice age (LIA) in the NW Himalaya. (AU)

FAPESP's process: 16/24946-9 - Sea-level changes and Global Monsoon System: clues from marine cores in Brazil
Grantee:Luigi Jovane
Support Opportunities: Research Program on Global Climate Change - Thematic Grants
FAPESP's process: 19/11364-0 - Investigating ocean acidification during the late Maastrichtian and early Danian from marine sections of Brazil and India: Implications for impact vs. volcanism roles in the Cretaceous-Paleogene boundary mass extinction.
Grantee:Priyeshu Srivastava
Support Opportunities: Scholarships in Brazil - Post-Doctoral