Document Type

Article

Publication Title

Geophysical Research Letters

Publication Date

8-16-2007

Issue Number

16

Publication Number

L16701

Volume Number

34

Abstract/ Summary

A highly resolved Mt. Everest ice core reveals a decrease in marine and increase in continental air masses related to relatively high summer surface pressure over Mongolia, and reduction in northward incursions of the summer South Asian monsoon since similar to 1400 AD. Previously published proxy records from lower sites south of the Himalayas indicate strengthening of the monsoon since this time. These regional differences are consistent with a south north seesaw in convective activity in the Asian monsoon region, and reflect a southward shift in the mean summer position of the monsoon trough since similar to 1400 AD. The change in monsoonal circulation at 1400 AD is synchronous with a reduction in solar irradiance and the onset of the LIA. This demonstrates a hemispheric scale circulation reorganization at this time, and the potential for future large shifts in monsoonal circulation.

Citation/Publisher Attribution

Kaspari, S, Mayewski, P, Kang, S, Sneed, S, Hou, S, Hooke, R, Kreutz, K, et al., 2007, Reduction in Northward Incursions of the South Asian Monsoon Since Approximate to 1400 Ad Inferred from a Mt. Everest Ice Core: Geophysical Research Letters, v. 34, L16701. To view the published open abstract, go to http://dx.doi.org and enter the DOI.

Publisher Statement

© Copyright 2007 American Geophysical Union

DOI

10.1029/2007GL030440

Version

publisher's version of the published document

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