1 research outputs found
Aerosol size characteristics over the Arabian Sea and Indian Ocean: extensive sub-micron aerosol loading in the Northern Hemisphere
Aerosol optical depth (AOD) measurements in the
spectral range 0.3–1.6 mm have been carried out using
a multi-channel solar radiometer onboard ORV Sagar
Kanya to understand the interaction between continental
and marine aerosols. Experiments have been
carried out under clear sky conditions for 22 days
during 20 January–12 March 1999 covering the latitude
belt between 17°N and 20°S, and longitude belt
between 71°E and 59°E, over Indian Ocean and Arabian
Sea as part of INDOEX IFP-99. Results show
larger particle abundance, close to the Indian coast
during forward leg compared to that of return leg of
the cruise. AODs, in general, exhibit larger values
north of ITCZ compared to that of south of ITCZ.
The spatial distribution of AOD at 0.502 mm shows
greater values north of ITCZ with significant latitudinal
gradient compared to that of south of ITCZ.
Aerosol size spectrum, derived from spectral AODs,
shows monomodal distribution for both pristine
oceanic environment (south of ITCZ) and for polluted
environment (north of ITCZ)