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Author:

Gupta, Anil K. (Gupta, Anil K..) | Singh, Raj K. (Singh, Raj K..) | Dutt, Som (Dutt, Som.) | Cheng, Hai (Cheng, Hai.) | Clemens, Steven C. (Clemens, Steven C..) | Kathayat, Gayatri (Kathayat, Gayatri.)

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Abstract:

High-resolution multi-proxy records are pivotal to analyze Indian monsoon variability and its linkages with socio-economic growth in South Asia. To constrain short-term shifts in the Indian monsoon, we analyzed a speleothem sample from Meghalaya, northeastern India encompassing-15.4 to 10.1 kilo year before the Present (kyr BP). Our new speleothem data from Meghalaya suggests wet conditions in northeastern India during-15.4 to 12.9 kyr BP and-11.3 to 10.1 kyr BP, punctuated by a dry phase during-12.9 to 11.3 kyr BP including the Younger Dryas (YD) cold interval. We suggest a southward shift of the Intertropical Convergence Zone (ITCZ) in addition to weak Atlantic Meridional Overturning Circulation and land-sea heat contrast during the YD event leading to a weak Indian summer monsoon. The Northern Hemisphere atmospheric heating shift the ITCZ northward, but our data shows high-frequency shifts in the ISM during-11.3 to 10.1 kyr BP following termination of the YD cold event. This interval also shows a higher growth rate of the studied speleothem sample. (c) 2021 Elsevier Ltd. All rights reserved.

Keyword:

Abrupt wet and dry intervals B?lling-?ller?d period Indian summer monsoon Meghalaya Umsynrang cave Younger Dryas

Author Community:

  • [ 1 ] [Gupta, Anil K.]Indian Inst Technol Kharagpur, Dept Geol & Geophys, Kharagpur 721302, W Bengal, India
  • [ 2 ] [Singh, Raj K.]Indian Inst Technol Bhubaneswar, Sch Earth Ocean & Climate Sci, Bhubaneswar 752050, Odisha, India
  • [ 3 ] [Gupta, Anil K.]Wadia Inst Himalayan Geol, 33 Gen Mahadeo Singh Rd, Dehra Dun 248001, Uttarakhand, India
  • [ 4 ] [Singh, Raj K.]Wadia Inst Himalayan Geol, 33 Gen Mahadeo Singh Rd, Dehra Dun 248001, Uttarakhand, India
  • [ 5 ] [Dutt, Som]Wadia Inst Himalayan Geol, 33 Gen Mahadeo Singh Rd, Dehra Dun 248001, Uttarakhand, India
  • [ 6 ] [Cheng, Hai]Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
  • [ 7 ] [Kathayat, Gayatri]Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
  • [ 8 ] [Cheng, Hai]Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 USA
  • [ 9 ] [Clemens, Steven C.]Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02912 USA

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Source :

QUATERNARY SCIENCE REVIEWS

ISSN: 0277-3791

Year: 2021

Volume: 259

4 . 1 1 2

JCR@2020

ESI Discipline: GEOSCIENCES;

ESI HC Threshold:22

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 1

SCOPUS Cited Count: 6

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 9

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