Physics
Scientific paper
Mar 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012jastp..77..144p&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 77, p. 144-151.
Physics
Scientific paper
This study explores the inevitable role of wind parameters such as wind speed, wind convergence and wind vorticity in the long range transport and distribution of aerosols in the winter time atmosphere over the Bay of Bengal (BoB) during the campaign Winter ICARB. MODIS observed aerosol optical depth (AOD), with an excellent agreement with ship borne Microtops AOD, was found to increase over the BoB particularly, in the eastern parts during the course of the campaign. The influence of atmospheric circulation on this increase is examined using the wind field from NCEP reanalysis and computed wind convergence and vorticity for first and second halves (FH and SH) of the campaign along with a back trajectory analysis using HYSPLIT transport and dispersion model. While surface winds over the BoB remained nearly the same throughout the campaign denying the possibility of enhancement in marine aerosol generation, the higher altitude winds altered significantly in SH providing a channel for aerosol transport from the Indian landmass to the BoB in addition to the increased forest fire contribution from south Asia. This suggested mechanism is supported by CALIPSO aerosol extinction profiles over the eastern BoB and the surrounding land masses. Fine particle dominance in MODIS AOD and diminished correlation between ship borne AOD and surface aerosol mass measurements during SH corroborate this inference by indicating the presence of elevated aerosol layers, which can contribute substantially to the radiative effects of the earth-atmosphere system. This study throws light on the importance of wind convergence and vorticity in the investigations on the long range transport and spatial distribution of aerosols.
Aloysius Marina
Beegum Naseema
Krishna Moorthy K.
Mohan Mannil
Prijith S. S.
No associations
LandOfFree
Role of circulation parameters in long range aerosol transport: Evidence from Winter-ICARB does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Role of circulation parameters in long range aerosol transport: Evidence from Winter-ICARB, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Role of circulation parameters in long range aerosol transport: Evidence from Winter-ICARB will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1561155