NASA Socioeconomic Data and Applications Center (SEDAC) – Hosted by CIESIN at Columbia University

Indicators of Coastal Water Quality

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Change in Chlorophyll-a Concentration, v1 (1998 – 2007)

Tabular data

Based on the SeaWiFS annual grids, we created a large table that includes a time series from 1998-2007 of the chlorophyll-a concentrations for each grid cell. The grid cells are organized by country, and statistics are calculated to show the percent change from 1998-2007 and if the grid cell has a statistically significant trend in chlorophyll-a concentrations. The rows of the table also are linked to a sequence grid (see ancillary data) to facilitate the mapping of the trend values for selected countries and areas of interest. The documentation describing how to do this can be found in the "Indicators of Coastal Water Quality: Data, Methods, and Results" PDF above.

The tabular data are provided in Excel 2007 and CSV format. Because the complete dataset exceeds the row limit for earlier versions of Excel (about 439,000 rows), we have broken it into 8 files that can be downloaded separately. To download the data (with accompanying metadata and documentation), click on the link below.