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Systematical underestimation of MODIS global chlorophyll-a concentration estimation algorithm associating with scale effect

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Title Systematical underestimation of MODIS global chlorophyll-a concentration estimation algorithm associating with scale effect
 
Creator Chen, Jun
Quan, Wenting
Sheng, Hui
 
Subject MODIS
OC3M algorithm
Global oceans
Chlorophyll-a concentration
Scale effect
 
Description 833-838
A framework for characterizing the scale
effects while using ocean chlorophyll 4 algorithm of MODIS (OC3M) to estimate chlorophyll-a
concentration (chla) from Moderate
Resolution Imaging Spectroradiometer (MODIS) imageries is presented. An eight
neighborhood algorithm is used to estimate the distribution variance of chla concentration, D(R3M), from MODIS imageries. Based on the
analysis for global data series of monthly composites of MODIS Aqua satellite
data from 2008 to 2010 at 4 km
resolution, the chla concentration
estimated by OC3M
algorithm would be smaller than in situ measurements in theory. This is
a even if the atmospheric effects has been accurately removed owing to the
scale effects. Relative scale error has characterizes associating with spatial
and time dependents. Largely, scale error mostly distributed in the coastal
waters, which is closely related with human society. In this study, D(R3M) is estimated very
coarsely, which would lead to the underestimation of scale errors of global chla data. As a result, how to accurately
estimate D(R3M)
may be possible areas for scale effect study in future.
 
Date 2013-12-13T12:55:35Z
2013-12-13T12:55:35Z
2013-11
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/24822
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.42(7) [November 2013]