Record Details

Assessment of MODIS-Aqua chlorophyll-a algorithms in coastal and shelf waters of the eastern Arabian Sea

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Assessment of MODIS-Aqua chlorophyll-a algorithms in coastal and shelf waters of the eastern Arabian Sea
Not Available
 
Creator Gavin, H.
Aneesh A. Lotleker
Peter, I.M.
Ashraf, P.M.
Srinivasa Kumar, T.
Suresh, T.
Raghavan, B.R.
Harilal B. Menon
 
Subject Case 2 waters
Coastal
Chlorophyll a
Arabian Sea
Ocean colour
MODIS-Aqua
 
Description Not Available
The use of ocean colour remote sensing to facilitate the monitoring of phytoplankton biomass in coastal waters is hampered by the high variability in absorption and scattering from substances other than phytoplankton. The eastern Arabian Sea coastal shelf is influenced by river run-off, winter convection and monsoon upwelling. Bio-optical parameters were measured along this coast from March 2009 to June 2011, to characterise the optical water type and validate three Chlorophyll-a (Chla) algorithms applied to Moderate Resolution Imaging Spectroradiometer on Aqua (MODIS-Aqua) data against in situ measurements. Ocean Colour 3 band ratio (OC3M), Garver–Siegel–Maritorena Model (GSM) and Generalized Inherent Optical Property (GIOP) Chla algorithms were evaluated. OC3M performed better than GSM and GIOP in all regions and overall, was within 11% of in situ Chla. GSM was within 24% of in situ Chla and GIOP on average was 55% lower. OC3M was less affected by errors in remote sensing reflectance Rrs(λ) and by spectral variations in absorption coefficient (aCDOM(λ)) of coloured dissolved organic material (CDOM) and total suspended matter (TSM) compared to the other algorithms. A nine year Chla time series from 2002 to 2011 was generated to assess regional differences between OC3M and GSM. This showed that in the north eastern shelf, maximum Chla occurred during the winter monsoon from December to February, where GSM consistently gave higher Chla compared to OC3M. In the south eastern shelf, maximum Chla occurred in June to July during the summer monsoon upwelling, and OC3M yielded higher Chla compared to GSM. OC3M currently provides the most accurate Chla estimates for the eastern Arabian Sea coastal waters.
Not Available
 
Date 2018-12-03T13:12:02Z
2018-12-03T13:12:02Z
2013-08
 
Type Research Paper
 
Identifier Gavin, H.,Aneesh A. Lotleker et. al.(2013)-Assessment of MODIS-Aqua chlorophyll-a algorithms in coastal and shelf waters of the eastern Arabian Sea.Continental Shelf Res. 65:14-28.
0278-4343
http://krishi.icar.gov.in/jspui/handle/123456789/15387
 
Language English
 
Relation Not Available;
 
Publisher Elsevier