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COMPARING THE REMOTELY SENSED CHROMOPHORIC DISSOLVED ORGANIC MATTER (CDOM) PRODUCT WITH IN-SITU CDOM IN THE NORTHERN BAY OF BENGAL

Abstract

Assessment of the role of estuarine-carbon fluxes is essential to improve the estimates of global carbon budget. Dissolved organic matter (DOM) plays an important role in aquatic carbon cycling. Chromophoric fraction of DOM (CDOM) is considered to be the major component of the dissolved natural organic matter (DNOM) in natural waters. CDOM also has many important effects on aquatic ecology and chemistry. Understanding the distribution and dynamics of CDOM thus is broadly important to monitoring, assessment and management of surface waters, and remote sensing is especially attractive for monitoring purposes because of its ability to make measurements at regional and even larger scales. The CDOM can be readily detected via in situ and remotely-sensed optical measurements. DOM properties, including CDOM absorption coefficient at 443 nm (aCDOM(443)) was examined in northern Bay of Bengal (nBoB), using in situ and satellite observations during February, 2015 - January, 2016. The aim of this study was to examine the relationship between in-situ measured CDOM and remotely sensed CDOM product in the nBoB. This is the first attempt to compare the remotely sensed CDOM product with in-situ CDOM in the northern Bay of Bengal. Present study revealed that remotely sensed CDOM product could be use after 50 km away from the shoreline in the nBoB.  


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