Comparative Analysis of Chlorophyll-a Measurements of Oceansat-2 OCM and SUOMI NPP- VIIRS over Arabian Sea

Observations of chlorophyll-a is a good means to assess the productivity of oceanic waters as well as to forecast, monitor and manage algal blooms. To compensate for the unavoidable data gaps from one sensor, observations from the other sensors are also required, such that they exist in close agreement with each other. Thus, chlorophyll-a data from two important ocean colour sensors, namely NPP VIIRS and Oceansat-2 OCM were analyzed at regions falling within coastal, open ocean and bloom-prone regions in the Arabian sea. Chlorophyll-a is significantly different in both the cases and thus needs season-wise bias in order to match with each other. Thus, biases were generated and are reported in this paper.