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Indicators of Coastal Water Quality: Annual Chlorophyll-a Concentration 1998-2007
Entry ID: CIESIN_SEDAC_ICWQ_ACHLOA

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Summary
Abstract: The Annual Chlorophyll-a Concentrations component of the Indicators of Coastal Water Quality

Collection consists of gridded satellite measurements of chlorophyll-a concentrations (in nanogram/cubic meter) in a band extending

between 10 and 100 km from the shoreline. Chlorophyll-a concentrations are derived from NASA's Sea-viewing Wide Field-of-view Sensor

(SeaWiFS). The grids are based on annual composites of SeaWiFS satellite data provided by the SeaWiFS Project, NASA/Goddard Space

Flight Center and GeoEye in the form of HDF files at a resolution of 5 arc-minutes (approximately 9 x 9 km at the equator). The

source files are true-color images generated from sub-sampled, calibrated, Rayleigh-corrected level-2 data, which are derived from

raw radiance counts by applying sensor calibration, atmospheric corrections, and bio-optical algorithms. To arrive at chlorophyll-a

concentrations, radiance counts were converted using the conversion formula provided as part of the original data files. The gridding

is done by the Columbia University Center for International Earth Science Information Network (CIESIN).


Purpose: To provide a gridded version of existing SeaWiFS data in GIS-compatible formats in order to

determine concentrations of chlorophyll-a in the coastal water column and to facilitate the integration with other

data.

Related URL
Link: View Related Information
Description: data download page


Link: View Related Information
Description: data set DOI and homepage


Geographic Coverage
 N: 89.99928 S: -90.0  E: 179.99857  W: -180.0

Data Set Citation
Version: 1.0


Temporal Coverage
Start Date: 1998-01-01
Stop Date: 2007-12-31


Science Keywords
OCEANS >OCEAN CHEMISTRY >PIGMENTS >CHLOROPHYLL    [Definition]
BIOSPHERE >ECOSYSTEMS >MARINE ECOSYSTEMS    [Definition]
HUMAN DIMENSIONS >ENVIRONMENTAL IMPACTS >CONSERVATION    [Definition]
HUMAN DIMENSIONS >ENVIRONMENTAL GOVERNANCE/MANAGEMENT >WATER MANAGEMENT    [Definition]


ISO Topic Category
OCEANS
GEOSCIENTIFIC INFORMATION
ENVIRONMENT
BIOTA


Project
ICWQ >Indicators of Coastal Water Quality    [Information]



Creation and Review Dates
DIF Creation Date: 2012-12-12
Last DIF Revision Date: 2016-01-27

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