Aerosol Optical Depth Variation at Dona Paula

Aerosol Optical Depth Variation at Dona Paula

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Abstract
T. Suresh, K. Ramdasan, Bindiya Phadte, Ancy Rodrigues
National Institute of Oceanography, Dona Paula – Goa
E-Mail: [email protected]

We present here the results of the spectral aerosol optical depth measured using a five-channel sun photometer at a location on the west coat of India,

Dona Paula, Goa [15.460 N, 73.800 E]. The monthly variations of aerosol optical depths indicate seasonal variations with elativity higher aerosol optical depth or atmosphere turbidity in the summer and very low aerosol optical depths during the winter. The Angstron exponent , which is an indicator of the size of the aerosols, show a clear indication of the size of aerosol particles and lower size particles during the summer and relatively smaller size particles during winter. The aerosol optical depth measured were compared with the derived values from the ocean color sensor SeaWiFS, which indicated that though the monthly variations were similar in nature to that observed from the measurements and the satellite values were found to be underestimated.