-
- Home
- Journals
- Journal of Earth System Science
-
Virupaxa K Banakar
Articles written in Journal of Earth System Science
-
-
Volume 126 Issue 6 August 2017 Article ID 0087
Indian summer monsoon forcing on the deglacial polar cold reversals
Virupaxa K Banakar Sweta Baidya Alexander M Piotrowski D Shankar
The deglacial transition from the last glacial maximum at $\sim$20 kiloyears before present (ka) to the Holocene (11.7 ka to Present) was interrupted by millennial-scale cold reversals, viz., Antarctic Cold Reversal ($\sim$14.5–12.8 ka) and Greenland Younger Dryas ($\sim$12.8–11.8 ka) which had different timings and extent of cooling in each hemisphere. The cause of this synchronously initiated, but different hemispheric cooling during these cold reversals (Antarctic Cold Reversal $\sim$3∘C and Younger Dryas $\sim$10∘C) is elusive because CO2, the fundamental forcing for deglaciation, and Atlantic meridional overturning circulation, the driver of antiphased bipolar climate response, both fail to explain this asymmetry. We use centennial-resolution records of the local surface water $\delta ^{18}\hbox {O}$ of the Eastern Arabian Sea, which constitutes a proxy for the precipitation associated with the Indian Summer Monsoon, and other tropical precipitation records to deduce the role of tropical forcing in the polar cold reversals. We hypothesize a mechanism for tropical forcing, via the Indian Summer Monsoons, of the polar cold reversals by migration of the Inter-Tropical Convergence Zone and the associated cross-equatorial heat transport.
-
-
Journal of Earth System Science
Volume 132, 2023
All articles
Continuous Article Publishing mode
-
Journal of Earth System Science | News
-
Editorial Note on Continuous Article Publication
Posted on July 25, 2019Click here for Editorial Note on CAP Mode
-
Special Issue - "Call for papers"
Posted on July 18, 2023
-