NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Whole Earth map based on satellite data. This is a mosaic of numerous satellite observations of the Earth. Land colours are shaded using topographic data. The land is dominated by vegetation (green) or arid land (brown) such as the deserts of North Africa. The polar regions are covered by snow and ice (white) on sea and land. The oceans are shown using data on chlorophyll (plant) distribution, to produce the light blue and greens swirls in some areas. This image mostly combines cloud-free MODIS (Moderate Resolution Imaging Spectroradiometer) data obtained from June-September 2001. Antarctica was imaged by AVHRR (Advanced Very High Resolution Radiometer) data.
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