Publication Date:
2016-04-05
Description:
This paper discusses different plausible mechanisms to account for the intrusion of dry ozone rich stratospheric air into the troposphere during the passage of the tropical cyclone Nilam-2012. The present study shows that the overshooting convection associated with the Nilam is found to be the prime candidate for the generation of turbulence in the vicinity of the tropopause (VOT). In adition, the presence of strong updarfts and downdrafts in the VOT weakened the stability of the tropopause which allows the dry ozone rich stratospheric air to penetrate downwards to the troposphere. Significant modulation of the tropopause structure is observed which is found to be accompanied by structures linked with shear instability. Concurrent ozone measurements also indicate the intrusion of stratospheric air mass to the upper and middle troposphere.
Print ISSN:
0035-9009
Electronic ISSN:
1477-870X
Topics:
Geography
,
Physics