@article{51a4d163abe44f25a637199044a2d6a4,
title = "Indian monsoon variability during the last 46 kyr: isotopic records of planktic foraminifera from southwestern Bay of Bengal",
abstract = "The Indian monsoon carries large amounts of freshwater to the northern Indian Ocean and modulates the upper ocean structure in terms of upwelling and productivity. Freshwater-induced stratification in the upper ocean of the Bay of Bengal is linked to the changes in the Indian monsoon. In this study, we test the usefulness of δ18O and δ13C variability records for Globigerina bulloides and Orbulina universa to infer Indian monsoon variability from a sediment core retrieved from the southwestern Bay of Bengal encompassing the last 46 kyr record. Results show that the northeast monsoon was dominant during the Last Glacial Maximum. Remarkable signatures are observed in the δ18O and δ13C records during the Marine Isotope Stage (MIS) 3 to MIS-1. Our study suggests that Indian monsoon variability is controlled by a complex of factors such as solar insolation, North Atlantic climatic shifts, and coupled ocean–atmospheric variability during the last 46 kyr.",
keywords = "Bay of Bengal, Foraminifera, Indian Monsoon, Indian Ocean, Late Quaternary",
author = "Gautam, {P. K.} and Narayana, {A. C.} and Kumar, {P. Kiran} and Bhavani, {P. G.} and Yadava, {M. G.} and Jull, {A. J.T.}",
note = "Funding Information: ACN thanks the Department of Ocean Development (presently the Ministry of Earth Sciences), Government of India, for the grants through project No. DOD/11‐MRDF/4/2/UNI/97(P‐6) sanctioned when the author was with Cochin University of Science & Technology, Cochin. The chief scientist and other crew members onboard are thanked for their support during the cruise. The authors thank Dr Prasanna Kumar of NIO for the sea surface height anomaly data and for valuable suggestions, and Dr P. Divakar Naidu for fruitful discussions. The authors pay homage to the late Prof. R. Ramesh, PRL, for his valuable suggestions and support during the course of this work. The authors thank the reviewers for their valuable suggestions, which helped in improving the quality of the manuscript. Sagar Kanya Funding Information: ACN thanks the Department of Ocean Development (presently the Ministry of Earth Sciences), Government of India, for the grants through project No. DOD/11-MRDF/4/2/UNI/97(P-6) sanctioned when the author was with Cochin University of Science & Technology, Cochin. The chief scientist and other crew members onboard Sagar Kanya are thanked for their support during the cruise. The authors thank Dr Prasanna Kumar of NIO for the sea surface height anomaly data and for valuable suggestions, and Dr P. Divakar Naidu for fruitful discussions. The authors pay homage to the late Prof. R. Ramesh, PRL, for his valuable suggestions and support during the course of this work. The authors thank the reviewers for their valuable suggestions, which helped in improving the quality of the manuscript. Publisher Copyright: {\textcopyright} 2020 John Wiley & Sons, Ltd.",
year = "2021",
month = jan,
doi = "10.1002/jqs.3263",
language = "English (US)",
volume = "36",
pages = "138--151",
journal = "Journal of Quaternary Science",
issn = "0267-8179",
publisher = "John Wiley and Sons Ltd",
number = "1",
}