És curiós que unes construccions que realitzen el famós efecte hivernacle, en el seu interior, han contribuït a que en els últims 25 anys haja disminuït en 0.75ºC la temperatura de la zona oest d’Almeria. A més de engendrar uns dels millors productes hortofrutícoles d’Europa durant tot l’any, els hivernacles, que han tenyit de blanc grans superfícies de la provincia d’Almeria, han augmentat l’albedo solar.
Açò significa que els colors blanquinosos dels hivernacles contribueixen a una major reflexió de la llum incident sobre la superfície terrestre, retornant-la a l’espai. D’aquesta manera, una menor part de la radiació solar és absorbida pel terreny, i d’aquesta forma les temperatures han baixat en aquestes zones. Ocorre el que passa a les zones cobertes de neu, glaciars…tot i que en aquest cas es paradoxal. Hivernacles, que diu que es poden veure des de l’espai, fan l’efecte contrari pel que van ser dissenyats.
Font: http://www.canalsur.es/informativos/noticia?id=56674&idCanal=713&idActivo=163
Etiquetes: albedo, hivernacles
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