Current Science

Open Access Open Access  Restricted Access Subscription Access

Regional disparity in summer monsoon precipitation in the Indian subcontinent during Northgrippian to Meghalayan transition


Affiliations
1 Wadia Institute of Himalayan Geology, 33, General Mahadeo Singh Road, Dehradun 248 001, India
2 Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur 721 302, India
3 School of Earth, Ocean and Climate Sciences, Indian Institute of Technology Bhubaneswar, Argul 752 050, India
 

The present study reveals distinct spatial variability of summer monsoon precipitation in Indian subcontinent during Northgrippian to Meghalayan transition. Protracted dry phase lasting ~1000 yrs was observed ~4.2 ka BP in southern and northwestern India whereas 200–300 yrs event occurred in northeastern parts. Strong El Niño conditions beginning ~4.3 kyr BP were associated with the millennial long dryness in western parts but its influence was limited in the eastern region. Cross-verified, high-resolution records from different geographic regions of India are still required to ascertain if regional differences occurred in span and magnitude during Northgrippian to Meghalayan transition.

Keywords

Indian summer monsoon, Indus civilization, Late Holocene, 4.2 ka event, Meghalayan age
User
Notifications
Font Size


  • Regional disparity in summer monsoon precipitation in the Indian subcontinent during Northgrippian to Meghalayan transition

Abstract Views: 582  |  PDF Views: 218

Authors

Som Dutt
Wadia Institute of Himalayan Geology, 33, General Mahadeo Singh Road, Dehradun 248 001, India
Anil K. Gupta
Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur 721 302, India
Rahul Devrani
Wadia Institute of Himalayan Geology, 33, General Mahadeo Singh Road, Dehradun 248 001, India
Ram R. Yadav
Wadia Institute of Himalayan Geology, 33, General Mahadeo Singh Road, Dehradun 248 001, India
Raj K. Singh
School of Earth, Ocean and Climate Sciences, Indian Institute of Technology Bhubaneswar, Argul 752 050, India

Abstract


The present study reveals distinct spatial variability of summer monsoon precipitation in Indian subcontinent during Northgrippian to Meghalayan transition. Protracted dry phase lasting ~1000 yrs was observed ~4.2 ka BP in southern and northwestern India whereas 200–300 yrs event occurred in northeastern parts. Strong El Niño conditions beginning ~4.3 kyr BP were associated with the millennial long dryness in western parts but its influence was limited in the eastern region. Cross-verified, high-resolution records from different geographic regions of India are still required to ascertain if regional differences occurred in span and magnitude during Northgrippian to Meghalayan transition.

Keywords


Indian summer monsoon, Indus civilization, Late Holocene, 4.2 ka event, Meghalayan age

References





DOI: https://doi.org/10.18520/cs%2Fv120%2Fi9%2F1449-1457