Chlorophyll : Global Maps
▻https://earthobservatory.nasa.gov/GlobalMaps/view.php?d1=MY1DMM_CHLORA&eocn=home&eoci=globalmaps
At the base of the ocean food web are single-celled algae and other plant-like organisms known as phytoplankton. Like plants on land, phytoplankton use chlorophyll and other light-harvesting pigments to carry out photosynthesis, absorbing atmospheric carbon dioxide to produce sugars for fuel. Chlorophyll in the water changes the way it reflects and absorbs sunlight, allowing scientists to map the amount and location of phytoplankton. These measurements give scientists valuable insights into the health of the ocean environment, and help scientists study the ocean carbon cycle.
These chlorophyll maps show milligrams of chlorophyll per cubic meter of seawater each month. Places where chlorophyll amounts were very low, indicating very low numbers of phytoplankton are blue. Places where chlorophyll concentrations were high, meaning many phytoplankton were growing, are dark green. The observations come from the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite. Land is dark gray, and places where MODIS could not collect data because of sea ice, polar darkness, or clouds are light gray.
]]>Cultiver des #algues sur les toits de Bangkok
▻http://www.lemonde.fr/planete/video/2013/08/27/de-la-spiruline-sur-les-toits_3466900_3244.html
Déjà utilisée en Afrique notamment pour lutter contre la malnutrition, la spiruline est une algue qui contient une forte dose de protéines. En Thaïlande, une entreprise a décidé de la cultiver sur les toits. Cette algue est la dernière innovation de l’#agriculture_urbaine, idéale dans une mégalopole qui manque de place.
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