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Description

The Change in Chlorophyll-a Concentrations 1998-2007 component of the Indicators of Coastal Water Quality Collection represents a tabular time series of the chlorophyll-a concentrations for each grid cell, derived from the "Indicators of Coastal Water Quality: Annual Chlorophyll-a Concentration 1998-2007" data set. Chlorophyll-a concentrations are derived from NASA's Sea-viewing Wide Field-of-view Sensor (SeaWiFS). The grid cells are organized by country, and the percentage of change from 1998-2007 is calculated for each cell. Each time series was assessed with a linear regression, and cells with statistically significant trends in chlorophyll-a concentrations are identified. The rows of the table are linked to a sequence grid from the "Indicators of Coastal Water Quality: Ancillary Data" collection to facilitate the mapping of the trend values for selected countries and areas of interest. The data are processed and compiled by the Columbia University Center for International Earth Science Information Network (CIESIN).

Product Summary

Platforms
OrbView-2
Instruments
SeaWiFS
Spatial Extent
N: 90 S: -90 E: 180 W: -180
Geographic Region
GLOBAL,
AMERICAN SAMOA,
ANGUILLA,
ANTIGUA AND BARBUDA,
AZORES,
BAHAMAS,
BARBADOS,
BERMUDA,
BOUVET ISLAND,
CAPE VERDE,
CAYMAN ISLANDS,
COMOROS,
COOK ISLANDS,
CUBA,
CYPRUS,
DOMINICA,
DOMINICAN REPUBLIC,
FAEROE ISLANDS,
FALKLAND ISLANDS,
FIJI,
FRENCH POLYNESIA,
GRENADA,
GUADELOUPE,
HAITI,
HEARD AND MCDONALD ISLANDS,
HOWLAND ISLAND,
INDONESIA,
JAMAICA,
JARVIS ISLAND,
MADAGASCAR,
MALAYSIA,
MALDIVES,
MAURITIUS,
MAYOTTE,
MICRONESIA,
MONTSERRAT,
NETHERLANDS ANTILLES,
NEW CALEDONIA,
NIUE,
NORFOLK ISLAND,
NORTHERN MARIANA ISLANDS,
PALMYRA ATOLL,
PHILIPPINES,
PITCAIRN ISLANDS,
PUERTO RICO,
REUNION,
SAMOA,
SAO TOME AND PRINCIPE,
SEYCHELLES,
SOLOMON ISLANDS,
SOUTH SANDWICH ISLANDS,
SRI LANKA,
ST HELENA,
ST KITTS AND NEVIS,
ST LUCIA,
ST VINCENT AND THE GRENADINES,
TOKELAU,
TONGA,
TURKS AND CAICOS ISLANDS,
TUVALU,
VANUATU,
VIRGIN ISLANDS,
WAKE ISLAND,
WALLIS AND FUTUNA ISLANDS,
ALBANIA,
ALGERIA,
ANGOLA,
ANTARCTICA,
ARGENTINA,
AUSTRALIA,
BAHRAIN,
BANGLADESH,
BELGIUM,
BELIZE,
BENIN,
BRAZIL,
BULGARIA,
CAMBODIA,
CAMEROON,
CANADA,
CHILE,
CHINA,
COLOMBIA,
CONGO,
COSTA RICA,
COTE D'IVOIRE,
CROATIA,
DENMARK,
DJIBOUTI,
ECUADOR,
EGYPT,
EL SALVADOR,
EQUATORIAL GUINEA,
ERITREA,
ESTONIA,
FINLAND,
FRANCE,
FRENCH GUIANA,
GABON,
GAMBIA,
GERMANY,
GHANA,
GREECE,
GUATEMALA,
GUERNSEY,
GUINEA,
GUINEA-BISSAU,
GUYANA,
HONDURAS,
ICELAND,
INDIA,
IRAN,
IRELAND,
ISRAEL,
ITALY,
JAPAN,
KENYA,
KUWAIT,
LATVIA,
LEBANON,
LIBERIA,
LIBYA,
LITHUANIA,
MAURITANIA,
MOROCCO,
MOZAMBIQUE,
MYANMAR,
NAMIBIA,
NETHERLANDS,
NEW ZEALAND,
NICARAGUA,
NIGER,
NIGERIA,
NORTH KOREA,
NORWAY,
OMAN,
PAKISTAN,
PANAMA,
PARAGUAY,
PERU,
POLAND,
QATAR,
ROMANIA,
RUSSIAN FEDERATION,
SAUDI ARABIA,
SENEGAL,
SERBIA,
SIERRA LEONE,
SOMALIA,
SOUTH AFRICA,
SOUTH KOREA,
SOUTH SUDAN,
SPAIN,
SUDAN,
SURINAME,
SWEDEN,
SYRIAN ARAB REPUBLIC,
TAIWAN,
TANZANIA,
THAILAND,
TOGO,
TUNISIA,
UGANDA,
UKRAINE,
UNITED ARAB EMIRATES,
UNITED KINGDOM,
UNITED STATES OF AMERICA,
URUGUAY,
VENEZUELA,
VIETNAM,
WESTERN ASIA,
WESTERN SAHARA,
YEMEN
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
c3550192453-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: Change in Chlorophyll-a Concentration 1998-2007 (Version 1.00) [Data set]. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC). https://doi.org/10.7927/H48W3B88 Date Accessed: 2025-07-04

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: Change in Chlorophyll-a Concentration 1998-2007. Palisades, NY: ESDIS. https://doi.org/10.7927/H48W3B88.

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