Current Science

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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
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