Roof Albedo Map Los Angeles

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Roof albedo map los angeles.

We have been leaders for decades in developing energy efficient windows improving indoor air quality coming up with new ideas to fix the nation s electricity grid and so much more. For our study we will use images taken of california in 2009 by the national agriculture. In nature white sea ice melting into the dark blue ocean in cities formerly green enviroments being covered with pavement and skyscrapers with black rooftops in cities the earth is slowly being covered. Berkeley lab scientists use aerial imagery to create an interactive map that displays the solar reflectance also known as albedo of individual roofs in bakersfield long beach los angeles san francisco and san jose.

This map displays roof albedo solar reflectance estimates from berkeley lab for los angeles. Los angeles for example recently implemented an ordinance that requires all new or refurbished residential buildings to be equipped with cool roofs. Reflective roofs are more energy efficient and cooler inside and out. The california roof albedo project sponsored by the california air resources board aims to improve measurements of solar reflectance throughout california using high resolution aerial imagery to measure reflectance of visible and near ir radiation.

Similar to the concept of increasing the albedo of city pavements white roofs have the potential to cool the atmosphere of los angeles by reflecting more sunlight back into space instead of absorbing it during the day and. This map contains four different types of data. The potential dividends of the ordinance are illustrated by the swaths of red and orange roofs indicating low albedo roofs in the los angeles portion of the map. In each city nearly all roofs have low albedo in the range of 0 05 0 25 panel b fig.

Albedo is the fraction of sunlight that is reflected from a surface. The albedo effect has been proven in both natural and man made environments in recent years. The data is provided by calfire. Albedo is the reflecting power of a surface.

We are at the forefront of cutting edge research that redefines building technology and explores all areas of urban systems. The area weighted mean roof albedo standard deviation for each city ranges from 0 17 0 08 los angeles to 0 20 0 11 bakersfield.