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

http://climate.nasa.gov/state_of_flux#Wetlandchanges_Nigeria.jpg Wetland changes, Nigeria Left: November 1984. Right: November 2009. The Inner Niger Delta is the largest wetland in Western Africa. It spreads out along a flat 200-kilometer (124-mile) stretch of the Niger River as it passes through the Sahel on its way to the southern edges of the Sahara Desert. The delta supports about one million people and a variety of ecosystem goods and services, including a productive fishery, pasture for sheep and cattle, land and water for agriculture and habitat for natural flora and fauna. The flooding that replenishes the wetland depends mainly on rainfall over the upper Niger River in the Guinean Highlands, and to a lesser extent in the Bani watershed in northern Cote d'Ivoire. Rainfall over the delta itself contributes only 5 to 10 percent of the delta's water. The 1984 image was taken during a prolonged drought, while the 2009 image follows a year of more normal precipitation. Source: United Nations Environment Programme (UNEP). From Africa Water Atlas (2010); Division of Early Warning and Assessment (DEWA), UNEP, Nairobi, Kenya.

Zvětšování rozlohy mokřadů u vnitřní delty řeky Niger v Nigérii, které jsou důležité pro obživu milionu lidí. Srovnávací období (mezi roky): 1984 – 2009 Více informací viz ZDE . | Foto: NASA