low albedo and high conductivity

Site Zoning Vignette and Multiple Choice

low albedo and high conductivity

Postby snting » Mon Jun 24, 2013 9:02 pm

i know grass is a good material to stabilize micro climate, but I read through many material, still very confused about albedo and conductivity. I think grass should be low albedo and low conductivity. But kaplan material said it is low albedo and high conductivity. Are you familiar with the topic. Thanks
snting
 
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Re: low albedo and high conductivity

Postby chedin » Thu Jun 27, 2013 10:24 am

snting, check out this discussion on the areforum regarding the same question
http://www.areforum.org/forums/archive/index.php/t-189627.html
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Re: low albedo and high conductivity

Postby ukarchi » Mon Sep 30, 2013 5:02 am

chedin wrote:snting, check out this discussion on the areforum regarding the same question
http://www.areforum.org/forums/archive/index.php/t-189627.html


Can someone elaborate on this since the forum is down? The low albedo and high conductivity question is one that has been tripping me up for awhile too. Thanks!
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Re: low albedo and high conductivity

Postby mjf185 » Sun Oct 13, 2013 9:43 pm

Forests/Grass....both use photosynthesis which equates to a low albedo (initially)...read below.

copied from wikipedia
Because forests are generally attributed a low albedo, (as the majority of the ultraviolet and visible spectrum is absorbed through photosynthesis), it has been erroneously assumed that removing forests would lead to cooling on the grounds of increased albedo. Through the evapotranspiration of water, trees discharge excess heat from the forest canopy. This water vapour rises resulting in cloud cover which also has a high albedo, thereby further increasing the net global cooling effect attributable to forests

source:
http://en.wikipedia.org/wiki/Albedo
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