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New York rooftops 40 degrees cooler painted white, reckons NASA/Columbia study

christian maglia

It’s long been suggested that white rooftops could help reduce the heat bubble microclimates that surround our cities simply by reflecting solar radiation directly back into space, and in 2010 we reported on NCAR efforts to demonstrate the effect through computer modeling. A new study goes one better, putting the theory into practice and pitting three white materials against one another on three New York rooftops. The results of the study appear to be overwhelmingly positive, with white roof coatings reducing peak rooftop temperatures in summer “by an average of 43 degrees Fahrenheit (about 24 degrees C).”

It’s hoped that the deployment of white roofs could help reduce the warming effect of urban microclimates that can see city temperatures several degrees higher than surrounding areas. The effect is thought in part due to the dark materials with which we build our cities, that reflect much less light than natural landscapes…

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MANON KUBLER. PERIODISTA , ESCRITORA EN RETIRADA. A LA SAGA DE UNA NUEVA CRONICA. PREPARO MIS BALAS. EXPULSO MIS FUEGOS. AFINO MIS LLAGAS. AVANZO. ME DEMORO. VUELVO A AVANZAR. BUSCO ESTOMAGOS QUE SUJETEN TOXICOS Y EXTREMOS. AQUI ESTOY, A LA SAGA, VIVIA Y SOBREVIVIDA PARA LA ALEGRIA DE POCOS, SALUD MANON

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