Water Transparency (Diffuse attenuation coefficient at 490nm, Kd490 in m^-1 at 4km resolution): The diffuse attenuation coefficient Kd490 measures the light penetration in the water column at the blue-green wavelengths (ca. 490 nm). It represents a good indicator of water transparency resulting from the combined action of absorption and backscattering by the water constituents, and the structure of the surrounding light field.
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- Turks and Caicos Islands, Chad, Seychelles, Syria, Eswatini, Sint Maarten, Slovenia, Sweden, Nicaragua, Togo, Thailand, Lithuania, Lesotho, Sri Lanka, Liechtenstein, Saint Martin, Macau, Latvia, Luxembourg, Monaco, Morocco, Trinidad and Tobago, Bulgaria, Bahrain, Bahamas, Bosnia and Herzegovina, Benin, Bonaire, Saint Eustatius and Saba, Burkina Faso, Bangladesh, Timor-Leste, Saint Barthélemy, Belarus, Turkmenistan, Kosovo, Anguilla, United Arab Emirates, Norfolk Island, Eritrea, Cambodia, Kiribati, Saint Kitts and Nevis, South Korea, Kuwait, Laos, Lebanon, Liberia, Libya, Saint Lucia, Western Sahara, Grenada, Czechia, Cyprus, Curaçao, Cuba, Cayman Islands, Christmas Island, Comoros, Colombia, Costa Rica, Cape Verde, Nigeria, Mali, Solomon Islands, Svalbard and Jan Mayen, Malta, Singapore, Senegal, Saint Helena, Ascension and Tristan da Cunha, Egypt, Rwanda, Russia, Sudan, Saudi Arabia, Jordan, Jersey, Guinea-Bissau, Japan, Israel, Iceland, Jamaica, Italy, Guernsey, Ghana, United Kingdom, Georgia, Kyrgyzstan, Kenya, Gibraltar, Guinea, Moldova, Madagascar, Tunisia, Angola, Andorra, Greenland, Niue, Samoa, Wallis and Futuna, South Africa, Iraq, US Virgin Islands, British Virgin Islands, Vanuatu, Vietnam, Hungary, Indonesia, Croatia, Haiti, British Indian Ocean Territory, Ireland, Isle of Man, India, Central African Republic, Botswana, Brazil, Bolivia, Bermuda, Belize, Bouvet Island, Iran, Brunei, Barbados, Yemen, French Guiana, Namibia, Germany, Djibouti, Dominica, Denmark, Dominican Republic, Algeria, Papua New Guinea, Palau, Philippines, Peru, Pitcairn Islands, Panama, Pakistan, Oman, New Zealand, Nauru, Niger, Zimbabwe, North Macedonia, Zambia, North Korea, Portugal, Poland, Puerto Rico, French Polynesia, Qatar, Paraguay, Albania, Réunion, Romania, South Georgia and the South Sandwich Islands, Hong Kong, Palestine, Maldives, Honduras, Heard Island and McDonald Islands, Norway, Nepal, Taiwan, Tuvalu, Turkey, Greece, Guatemala, Netherlands, Guam, New Caledonia, Tokelau, Tajikistan, American Samoa, Armenia, French Southern Lands, Antarctica, Australia, Antigua and Barbuda, Ecuador, Austria, Belgium, Burundi, Mexico, Kazakhstan, Equatorial Guinea, Azerbaijan, Northern Mariana Islands, Mongolia, Mauritania, Mozambique, Martinique, Montserrat, Malawi, Mauritius, Mayotte, Malaysia, Bhutan, Saint Vincent and the Grenadines, Venezuela, Uruguay, United States, Uzbekistan, Vatican City, Tanzania, Uganda, Ukraine, United States Minor Outlying Islands, Tonga, Congo, Cook Islands, Cameroon, Guadeloupe, China, Côte d’Ivoire, Switzerland, Chile, Canada, The Gambia, Aruba, Åland Islands, Argentina, El Salvador, Sierra Leone, Somalia, San Marino, Serbia, Saint Pierre and Miquelon, São Tomé and Príncipe, South Sudan, Slovakia, Suriname, Myanmar/Burma, Montenegro, Faroes, France, Falkland Islands, Fiji, Finland, Ethiopia, Estonia, Spain, Guyana, Gabon, Micronesia, Afghanistan, Marshall Islands, Cocos (Keeling) Islands, Democratic Republic of the Congo
European Commission, Joint Research Centre (JRC)