White Roofs Albedo

A worldwide conversion to white roofs accounting for their albedo effect only was calculated to cool population weighted temperatures by 0 02 k but to warm the earth overall by 0 07 k.

White roofs albedo.

Albedo æ l ˈ b iː d oʊ latin. Albedo meaning whiteness is the measure of the diffuse reflection of solar radiation out of the total solar radiation and measured on a scale from 0 corresponding to a black body that absorbs all incident radiation to 1 corresponding to a body that reflects all incident radiation. By jann swanson on monday while discussing dark roofing materials we mentioned albedo a word we are sure the majority of non scientists have. White roofs and albedo email page print bookmark.

Reflective surfaces are a form of geoengineering. White roofs change surface albedo and affect energy demand. The research published in the journal scientific reports last year found that in a city like sydney australia a city wide array of solar panels could reduce summer. The most well known type of reflective surface is the cool roof.

Reflective surfaces can deliver high solar reflectance the ability to reflect the visible infrared and ultraviolet wavelengths of the sun reducing heat transfer to the surface and high thermal emittance the ability to radiate absorbed or non reflected solar energy. New research shows that white roofs may actually add to global warming. Surface albedo is defined as the ratio of radiosity to the.