Assessing temporal variation of coloured dissolved organic matter in the coastal waters of south eastern Arabian sea
Assessing temporal variation of coloured dissolved organic matter in the coastal waters of south eastern Arabian sea
Date
2020
Authors
Minu, P.
Souda, V.P.
Baliarsingh, S.K.
Dwivedi, R.M.
Ashraf, P.M.
Journal Title
Journal ISSN
Volume Title
Publisher
Springer
Abstract
Coloured dissolved organic matter (CDOM) plays a major role in marine photochemical and biological processes
and its optical properties are known to affect the underwater light penetration. This paper highlights in situ optical
estimation and satellite retrieval of CDOM in deciphering its temporal variations in coastal waters of the South
Eastern Arabian Sea. The study accentuated the source of CDOM as terrigenous origin during monsoon, of in situ
productions during pre-monsoon and during post-monsoon of autochthonous-allocthonous origin. The matchup
analysis for in situ and MODIS Aqua retrieved Adg443 exhibited bias which decreased by incorporating the
seasonal component. The study also identified degrading bloom of Noctiluca scintillans as the source for
exceptionally high CDOM in the area during January and February. The study demands to incorporate seasonal
components and phytoplankton abundance while assessing the performance of CDOM algorithms in optically
complex coastal waters.
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Citation
Acta Oceanol. Sin., Vol. 39(1):102–109