TITLE:
Retrieval of Aerosol Optical Depth from Oceansat-2 OCM
AUTHORS:
Udaya Lakshmi Sriperambudur, Chandralingam Sonnati, Nagamani Pullaiahgari Venkata, Preethi Latha Thalathoti
KEYWORDS:
AOD, OCM-2, Atmospheric Correction
JOURNAL NAME:
Open Journal of Marine Science,
Vol.5 No.4,
October
27,
2015
ABSTRACT: Aerosols are the tiny
suspended particles in the atmosphere playing a major role in influencing the
net radiation budget of the earth. The aerosols also affect cloud microphysics
and those with land origin, possibly reduce the monsoon rainfall. Dynamic and
diverse nature of the aerosols varies according to different locations. The
aerosols originating due to desert dust, rural atmospheric situations, urban
pollutants and marine areas have wide variations and display specific characteristics.
Routine monitoring of aerosol events and their subsequent dispersal pattern are
important in order to understand their role in climatic process. Hence, it is
very important to study the aerosols and their retrieval strategy from the
ocean colour remote sensing sensors. The satellite sensors provide platform for
making observations covering large area as also their short-term and frequent
repetivity. Ocean-colour sensors e.g. CZCS, SeaWiFS, MODIS, POLDAR, Oceansat-1& 2 OCM have been used to study
aerosols, apart from being used to study ocean-colour. Most of the ocean-colour
sensors are equipped with a few additional near infrared (NIR) bands (λ> 700 nm), which are helpful in
providing vital information on atmospheric aerosols due to strong absorption by
water in NIR wavelengths. The present work is an attempt to study the temporal
and spatial variations of Aerosol Optical Depth (AOD) over the Bay of Bengal
using Oceansat-2 Ocean Colour Monitor (OCM).