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Description

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).

Product Summary

Platforms
OrbView-2
Instruments
SeaWiFS
Spatial Extent
N: 89.99928 S: -90 E: 179.99856 W: -180
Spatial Resolution
0.008333 Decimal Degrees x 0.008333 Decimal Degrees
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
1998-01-01 to 2007-12-31
Data Partner
Earth Science Data Information System (ESDIS)
Concept ID
c3550194158-esdis
Data State
COMPLETE
Processing Level
4
Published
Updated

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Goddard Space Flight Center-GSFC, & Center For International Earth Science Information Network-CIESIN-Columbia University. (2009). Indicators of Coastal Water Quality: Annual Chlorophyll-a Concentration 1998-2007 (Version 1.00) [Data set]. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). https://doi.org/10.7927/H4DN4300 Date Accessed: 2025-07-02

Data Center Citation

Goddard Space Flight Center - GSFC, and Center for International Earth Science Information Network - CIESIN - Columbia University. 2009. Indicators of Coastal Water Quality: Annual Chlorophyll-a Concentration 1998-2007. Palisades, NY: ESDIS. https://doi.org/10.7927/H4DN4300.

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