1. Role of dynamics on the formation and maintenance of the elevated aerosol layer during monsoon season over south-east peninsular India
- Author
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V. Ravikiran, B. V. Krishna Murthy, S. Vijaya Bhaskara Rao, M. Venkat Ratnam, M. Roja Raman, Achuthan Jayaraman, and Priyajit Prasad
- Subjects
Atmospheric Science ,010504 meteorology & atmospheric sciences ,Tropical Easterly Jet ,010501 environmental sciences ,Atmospheric sciences ,Monsoon ,Low level jet ,01 natural sciences ,Aerosol ,South east ,Environmental science ,Scavenging ,0105 earth and related environmental sciences ,General Environmental Science ,Vertical shear - Abstract
The existence of elevated aerosol layer is common over India during monsoon season. Though its sources are well explained through long-range transport, its formation and maintenance is not explained to date. The formation and maintenances of an elevated aerosol layer, starting from ∼2 km and extending up to ∼5.5 km noticed is explained using two nearby lidars located in peninsular India. Existence of a cleaner environment with low aerosol loading below 2 km is attributed to the wet scavenging and existence of no strong local source. The low level jet (LLJ) from Arabian Sea persisting between 2 and 3 km is the main mechanism suggesting strong role of dynamics in the formation of these elevated layers. Persistent strong shears existing between LLJ and tropical easterly jet during this season restrict the up-liftment of aerosols to the higher altitudes. Observed features are explained in the light of dynamics, meteorology and long-range transport. more...
- Published
- 2018
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