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- Global annual coastal chlorophyll-A concentrations (2005)
Global annual coastal chlorophyll-A concentrations (2005)
- Description:
The flow of nutrients into coastal waters from land-based sources has seen a worldwide increase over the last decades. The resulting change in water quality has many potential impacts on coastal and marine ecosystems. Phosphorus and nitrogen contribute to enhanced algae growth, and subsequent decomposition reduces oxygen availability to benthic sea creatures like fish, shell fish, and crustaceans. Changes to nutrient loadings can also change the phytoplankton species composition and diversity. In extreme cases, eutrophication can lead to hypoxia—oxygen-depleted “dead zones”—and harmful algal blooms.
Measuring chlorophyll concentrations as an indicator of algae biomass may provide one tool to assess coastal water quality and its change over time. This study used chlorophyll-A concentrations derived from NASA's Sea-viewing Wide Field-of-view Sensor (SeaWiFS) to analyze trends over a ten year period (1998–2007). We attempted to identify near-coastal areas with improving, declining, and stable chlorophyll concentrations that can provide guidance for decision making in the context of environmental management.
- Data Provided By:
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This work, including access to the data and technical assistance, is
provided by CIESIN, with funding from the National Aeronautics and Space
Administration under Contract NAS5-03117 for the continued operation of
the Socioeconomic Data and Applications Center (SEDAC).
- Content date:
- not specified
- Citation:
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"Center for International Earth Science Information Network
(CIESIN), Columbia
University. 2009. Indicators of Coastal Water Quality: Data distributed by the Socioeconomic Data and Applications Center (SEDAC): http://sedac.ciesin.columbia.edu/es/seawifs.html. [Date downloaded]
- Spatial Resolution:
- 0.083333 decimal degrees
- Contact Organization:
- SEDAC
- Contact Person(s):
- not specified
- Use Constraints:
This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 License.
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About the Uploader
The Conservation Biology Institute (CBI) provides scientific expertise to support the conservation and recovery of biological diversity in its natural state through applied research, education, planning, and community service.
