scholarly journals Evaluation of Hyperspectral Multi-Band Indices to Estimate Chlorophyll-A Concentration Using Field Spectral Measurements and Satellite Data in Dianshan Lake, China

Water ◽  
2013 ◽  
Vol 5 (2) ◽  
pp. 525-539 ◽  
Author(s):  
Liguo Zhou ◽  
Bo Xu ◽  
Weichun Ma ◽  
Bin Zhao ◽  
Linna Li ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Satellite Data ◽  
Spectral Measurements ◽  
Chlorophyll A Concentration ◽  
Dianshan Lake ◽  
Multi Band

scholarly journals VARIABILITY OF CHLOROPHYLL-a CONCENTRATION OF THE NORTHERN SUMBAWA WATERS BASED ON Sea WiFS SATELLITE DATA

2009 ◽  
Vol 1 (2) ◽  
Author(s):  
Bisman Nababan ◽  
Diki Zulkarnaen ◽  
Jonson Lumban Gaol
Keyword(s):  
Chlorophyll A ◽  
Satellite Data ◽  
Coastal Waters ◽  
Low Temperatures ◽  
Water Mass ◽  
The West ◽  
Chlorophyll A Concentration ◽  
Transition Season ◽  
Goddard Space Flight Center ◽  
Second Peak

<p>Variability of chlorophyll-a concentrations of the northern Sumbawa waters was investigated based on SeaWiFS satellite data for the period of January 1998-December 2007. Chlorophyll-aconcentration was estimated employing OC4v4 algorithm. Chlorophyll-a concentrations of,SeaWiFS satellite data were obtained from the Goddard Space Flight Center, NASA archieve data. In general, fluctuations of chlorophyll-a concentration of the northern Sumbawa waters had three patterns i.e., the maximum with a range of 0,21-0,74 mg/m3 occurred during the West Season (November-February), the minimum with a range of 0.12-0.15 mg/m3 occurred during Transition Season I (March-April), and relatively high (second peak) with a range of 0.21-0.36 mg/m3 occurred during the mid-East Season until the beginning of Transition Season II (July-September).High chlorophyll-a concentration occurred during the West Season was closely related to the high rainfall, the possibility of vertical water mass mixing,and upwelling process in the northern coastal waters of Sumbawa. Meanwhile, the relatively high (second peak) of chlorophyll-aconcentration occurred in July-September was caused by the movement of water masses from the South of Makassar Strait containing relatively high chlorophyll-a concentrations and relatively low temperatures since upwelling processes occurred at this location in the same period.</p> <p>Keywords:Chlorophyll-a,northern Sumbawa waters, SeaWiFS, OC4v4, upwelling</p> <p> </p>

scholarly journals VARIABILITY OF CHLOROPHYLL-a CONCENTRATION OF THE NORTHERN SUMBAWA WATERS BASED ON Sea WiFS SATELLITE DATA

2009 ◽  
Vol 1 (2) ◽  
Author(s):  
Bisman Nababan ◽  
Diki Zulkarnaen ◽  
Jonson Lumban Gaol
Keyword(s):  
Chlorophyll A ◽  
Satellite Data ◽  
Coastal Waters ◽  
Low Temperatures ◽  
Water Mass ◽  
The West ◽  
Chlorophyll A Concentration ◽  
Transition Season ◽  
Goddard Space Flight Center ◽  
Second Peak

Variability of chlorophyll-a concentrations of the northern Sumbawa waters was investigated based on SeaWiFS satellite data for the period of January 1998-December 2007. Chlorophyll-aconcentration was estimated employing OC4v4 algorithm. Chlorophyll-a concentrations of,SeaWiFS satellite data were obtained from the Goddard Space Flight Center, NASA archieve data. In general, fluctuations of chlorophyll-a concentration of the northern Sumbawa waters had three patterns i.e., the maximum with a range of 0,21-0,74 mg/m3 occurred during the West Season (November-February), the minimum with a range of 0.12-0.15 mg/m3 occurred during Transition Season I (March-April), and relatively high (second peak) with a range of 0.21-0.36 mg/m3 occurred during the mid-East Season until the beginning of Transition Season II (July-September).High chlorophyll-a concentration occurred during the West Season was closely related to the high rainfall, the possibility of vertical water mass mixing,and upwelling process in the northern coastal waters of Sumbawa. Meanwhile, the relatively high (second peak) of chlorophyll-aconcentration occurred in July-September was caused by the movement of water masses from the South of Makassar Strait containing relatively high chlorophyll-a concentrations and relatively low temperatures since upwelling processes occurred at this location in the same period. Keywords:Chlorophyll-a,northern Sumbawa waters, SeaWiFS, OC4v4, upwelling  

scholarly journals Application of Satellite Data for Retrieving the Light Absorption Characteristics in the Black Sea Waters

2021 ◽  
Vol 28 (2) ◽  
Author(s):  
V. S. Suetin ◽  
S. N. Korolev ◽  
◽  
Keyword(s):  
Chlorophyll A ◽  
Black Sea ◽  
Satellite Data ◽  
Light Absorption ◽  
The Black Sea ◽  
Universal Method ◽  
Chlorophyll A Concentration ◽  
Inherent Optical Properties ◽  
Yellow Substance ◽  
The Crimea

Purpose. he work is aimed at studying the effects of light absorption in the Black Sea waters with due regard for the variations of its individual components, and how they are manifested in the NASA archival results of calculating the chlorophyll a concentration obtained by processing satellite data using the universal operational method. Methods and Results. The NASA archival data of the MODIS and SeaWiFS satellite instruments, and the values of the light absorption components (determined by the method of Generalized ocean color inversion model for retrieving marine inherent optical properties (GIOP)) related to yellow substance and phytoplankton were analyzed. In order to avoid possible manifestations of various distortions in the results of determining the remote sensing reflectance of the sea and in the products resulted from application of the GIOP method, only the specially selected and sufficiently reliable test data from two areas located near the Crimea Southern Coast and south of the Danube estuary were used. Conclusions. In the considered examples with low content of chlorophyll a in the seawater, the yellow substance plays a predominant role in light absorption in the spectrum blue part, whereas if the chlorophyll a content is high, the phytoplankton contribution is dominant. The revealed relationship between the light absorption components related to yellow substance and phytoplankton significantly differs from that implicitly preset as a basis of the universal method (applied in NASA for the satellite data operational processing) for determining the chlorophyll a concentration. This, in its turn, is manifested in the fact that the data on the chlorophyll a concentration in the Black Sea stored in the NASA archive may be overestimated in case the chlorophyll a concentration is low, and underestimated – in case it is high.

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