However keep in mind that most commercial buildings if not all them have for years painted their roofs white "Snow Coat" or Aluminum , metal clad roofs are white or other light colors
Maybe in Hawaii but this is certainly not true in Boston. I can think of only places where the sun is blistering where I have seen this to be true. Greece and the Caribbean. I guess Hawaii falls into the same category where it has obvious benefits for cutting AC use if your roof is white.
But lowering albedo of a city to just lower the temp of the city and thus cut warming effects thus offsetting CO2 warming is a different story. All the numbers seem reasonable and are using current data not 11 year old numbers.
Without looking a the math one can do something very dangerous and use common sense and come up with the same conclusion as the papers. (Common sense is often wrong when looking at global effects like this.)
One can look out the airplane window when landing and figure out that the 25% roof, 35% paved surface of a city seems about right. And it doesn't take a rocket scientist to feel the difference between the temp of a city and the surrounding area. Boston runs about 15 degrees higher than the suburbs and those are all tarmac too.
As an aside, I have known about the 35% paved number for a while. I find it an amazing number. That we live in a city but we pave more than a third of it so our automobiles can have a place to roll and park. Amazingly stupid. That a church which needs a place to park the parishioners on Sunday morning will pave over their gardens from sidewalk to sidewalk is just plain idiocy. An acre of black tar instead of grass so cars can park for one hour a week.
Tice Farms was a farm and roadside stand located in Woodcliff Lake, New Jersey. Founded in 1808, it was a local landmark which attracted families from miles around, especially in the fall, when it was noted for pumpkins, apple cider, and other fall products. With its across-the-street rival, Van Ripers Farm, intense traffic problems developed on fall weekends.
Beginning in the 1970's, the farm was increasingly squeezed by local land development, and Richard Tice, the head of the family, repeatedly sold land to accommodate construction.
The site of the farm buildings, on Chestnut Ridge Road, is now occupied by the Tice's Corner mall.
The ONLY APPLE LEFT in Tice's Farm:
_________________________ . "...or am I a butterfly dreaming she's a woman?"
Xplain's use of MacNews, AppleCentral and AppleExpo are not affiliated with Apple, Inc. MacTech is a registered trademark of Xplain Corporation. AppleCentral, MacNews, Xplain, "The journal of Apple technology", Apple Expo, Explain It, MacDev, MacDev-1, THINK Reference, NetProfessional, MacTech Central, MacTech Domains, MacForge, and the MacTutorMan are trademarks or service marks of Xplain Corp. Sprocket is a registered trademark of eSprocket Corp. Other trademarks and copyrights appearing in this printing or software remain the property of their respective holders.
All contents are Copyright 1984-2010 by Xplain Corporation. All rights reserved. Theme designed by Icreon.