El mapa muestra la Sequía en Texas vista con ayuda de los satélites gemelos GRACE, de la NASA y la Deutsche Forschungsanstalt für Luft und Raumfahrt (DLR) de Alemania.
"The map depicts the amount of groundwater stored underground in the continental United States on November 28, 2011, as compared to the long-term average from 1948 to 2011. Deep reds reveal the most depletion, with deep blues representing aquifers and soils that are nearly full. The maroon shading over eastern Texas, for example, shows that the ground has been this dry less than two percent of the time between 1948 and the present."
Los satélites gemelos GRACE (Gravity Recovery and Climate Experiment) miden pequeños cambios en la gravedad terrestre causados por la redistribución de agua, tanto superficial como subterránea.
Visto en Earth Observatory (NASA)
No hay comentarios.:
Publicar un comentario