Dropping Acid.

• Autores: Sarah Simpson
• Localización: Scientific American, ISSN 0036-8733, Vol. 298, Nº. 4, 2008, págs. 27-28
• Idioma: inglés
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• Resumen

  • The article reports on a theory that the environment of the planet Mars may once have been characterized by sulfurous acid rain. Signs of a wet era include river valleys, deltas and remnants of evaporated seas. Mars needed a greenhouse atmosphere to sustain its watery past. Climate models indicate that carbon dioxide alone could not have kept the surface above freezing. Sulfur dioxide could have provided the extra greenhouse warming that Mars needed to stay wet. INSET: Seeking Sulfites.