Examining the wintertime response to tropical convection over the Indian Ocean by modifying convective heating in a full atmospheric model
Article first published online: 5 OCT 2007
Copyright 2007 by the American Geophysical Union.
Geophysical Research Letters
Volume 34, Issue 19, October 2007
How to Cite
2007), Examining the wintertime response to tropical convection over the Indian Ocean by modifying convective heating in a full atmospheric model, Geophys. Res. Lett., 34, L19702, doi:10.1029/2007GL030043., , and (
- Issue published online: 5 OCT 2007
- Article first published online: 5 OCT 2007
- Manuscript Accepted: 3 AUG 2007
- Manuscript Revised: 27 JUN 2007
- Manuscript Received: 15 MAR 2007
- tropical convection;
- Indian Ocean;
- Southwest Asia
 The boreal winter response to tropical convection in the eastern Indian Ocean is investigated by increasing the mid-level diabatic heating for that region in the NCAR Community Atmosphere Model, version 3.1. The response is quite similar to the analytic Gill solution to steady heating, with a pair of Rossby wave packets poleward and to the west of the heating, extending into mid-latitudes, and a Kelvin response to the east of the heating. Changes to tropical convection in the eastern Indian Ocean are an important component of several important modes of atmospheric variability, including the Madden-Julian Oscillation, some El Niño-Southern Oscillation events, and the Indian Ocean Dipole. The simulated response has considerable similarities to observational aspects of these modes, both in terms of the Gill-like circulation patterns and changes to precipitation over Southwest Asia, demonstrating the central importance of the Indian Ocean convection in determining the regional response.