Unikátní snímky NASA: Sluneční erupce v detailu - Aktuálně.cz

http://climate.nasa.gov/state_of_flux#Agriculturalgrowth_SaudiArabia1.jpg Agricultural growth, Saudi Arabia Only a few centimeters (about one inch) of rain falls in the Saudi Arabian desert each year, but crops still grow thanks to aquifers deep below the surface, which contain water trapped during the last Ice Age and rainwater that fell over several hundred thousand years. Saudi Arabia drills through the desert floor and irrigates the fields with a circular sprinkler system known as center-pivot irrigation. Hydrologists estimate that it will be economical to pump this water only for about 50 more years. In these images, the agricultural fields are about one kilometer (0.6 miles) across. Healthy vegetation appears bright green while dry vegetation looks orange. Barren soil is dark pink and urban areas, like the town of Tubarjal at the top of each image, are purple. See also this image. Images taken by the Thematic Mapper sensor onboard Landsat 4 and 5, and the Enhanced Thematic Mapper Plus sensor onboard Landsat 7. Source: NASA/Aries Keck, Goddard Space Flight Center.

Růst zemědělství v pouštní oblasti Wadi As-Sirhan v Saúdské Arábii. Srovnávací období (mezi roky): 1987 – 2000 – 2012 Více informací viz ZDE . | Foto: NASA