Theoretical aspects of the onset of Indian summer monsoon from perturbed orography simulations in a GCM

71Citations
Citations of this article
73Readers
Mendeley users who have this article in their library.

Abstract

A theory is proposed to determine the onset of the Indian Summer Monsoon (ISM) in an Atmospheric General Circulation Model (AGCM). The onset of ISM is delayed substantially in the absence of global orography. The impact of orography over different parts of the Earth on the onset of ISM has also been investigated using five additional perturbed simulations. The large difference in the date of onset of ISM in these simulations has been explained by a new theory based on the Surface Moist Static Energy (SMSE) and vertical velocity at the mid-troposphere. It is found that onset occurs only after SMSE crosses a threshold value and the large-scale vertical motion in the middle troposphere becomes upward. This study shows that both dynamics and thermodynamics play profound roles in the onset of the monsoon.

Cite

CITATION STYLE

APA

Chakraborty, A., Nanjundiah, R. S., & Srinivasan, J. (2006). Theoretical aspects of the onset of Indian summer monsoon from perturbed orography simulations in a GCM. Annales Geophysicae, 24(8), 2075–2089. https://doi.org/10.5194/angeo-24-2075-2006

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free