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Free Picture: First Composite Image of the Global Biosphere 6/1980
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Description
This first image of the global biosphere which was produced by combining data from two different satellite sensors show for the first time the productive potential of the Earth's vegetative biomass. The ocean image is a composite of all data collected during the 20-month period from November 1978 through June 1980 by the Coastal Zone Color Scanner (CZCS) flown on NASA's Nimbus-7 satellite, managed by the Goddard Space Flight Center, Greenbelt, Maryland. The CZCS data show concentrations of marine phytoplankton pigment. Phytoplanktons, the microscopic plants that grow in the sunlight regions of the ocean, form the base of the marine food web. Red and orange colors indicate areas of high plankton concentrations. Yellow and green represent areas of moderate concentration. One of the most notable features in this image is the clear delineation of the equator through increased plant abundance, and the differences between the equatorial Atlantic, Indian, and Pacific Oceans. Plankton concentrations tend to be high nutrients to the sunlit upper ocean layers. Major areas of the South Pacific are blank (black areas=no data) because the CZCS could operate only intermittently. The land-vegetation image is a composite of three years of data from the Advanced Very High Resolution Radiometer (AVHRR) on the National Oceanographic and Atmospheric Agency (NOAA-7) satellite, which measured land-surface radiation in the visible and near-infrared bands to estimate chlorophyll and leaf potential for chlorophyll production. The lighter shades of green highlight tropical and subtropical forests, temperate forests and farmlands, and some drier regions such as savannas and pampas. The yellow shades in the United States Midwest show lower potential, while the darker yellow shades of Northern Hemisphere forests and the dry Australian Outback rank lower. Desert, high mountains, and arctic regions reflect barren conditions, intermittently. The land-vegetation image is a composite of three years of data from the Advanced Very High Resolution Radiometer (AVHRR) on the NOAA-7 satellite, which measures land-surface radiation in the visible and near-infrared bands to estimate chlorophyll and leaf mass. The dark green areas (rain forests) show the highest potential for chlorophyll production. The lighter shades of green highlight tropical and subtropical forests, temperate forests and farmlands and some drier regions such as savannas and pampas. The yellow shades in the United States Midwest show lower potential, while the darker yellow shade of Northern Hemisphere forests and the dry Australian Outback rank lower. Desserts, high mountains, and arctic regions reflect barren conditions.
Keywords
advanced very high resolution radiometer, avhrr, coastal zone color scanner, czcs, earth, earth science, environment, environmental, map, nasa, noaa, global biosphere, free photography, free photo, free photos, free picture, free pictures, free image, free images
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