Journal
ANNALES GEOPHYSICAE
Volume 24, Issue 8, Pages 2075-2089Publisher
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/angeo-24-2075-2006
Keywords
meteorology and atmospheric dynamics; general circulation precipitation; tropical meterology
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available