Sentences with phrase «average albedo»

"Average albedo" refers to the measure of how much light or radiation is reflected by a surface, such as the Earth's atmosphere or a planet. It represents the average reflectivity of that surface. Full definition
Scientists began taking records of albedo on Greenland in 2000, and 2014 saw the record low for August and the second lowest average albedo for the summer, which you can see in the graphs below.
Wouldn't it be a pretty good first approximation to model a one square meter of earth and the atmosphere above it with average albedo, average solar input, average cloud cover, etc?
Longer duration = higher average albedo over a day.
Over the current century, the model projects that the average albedo for the entire ice sheet will fall by as much as 8 percent, and by as much 10 percent on the western edge, where the ice is darkest today.
The trends revealed by the data were clear: The average albedo in the northern area of the Arctic Ocean, including open water and sea ice, is declining in all summer months (May - August).
The average albedo is 0.3 and the snow albedo is 0.8.
Also, Earth's average albedo is near 30 %, not 36 %.
[34] Reduction of the area of Arctic sea ice reduces the planet's average albedo, possibly resulting in global warming in a positive feedback mechanism.
Firstly, the retreat of the sea ice or the loss of the ice will mean that global warming will increase because you are changing a large area of white to dark, reducing the average albedo [reflection] of the planet... Secondly, there will be an acceleration of sea level rise because warm air that lies over the open water in the Arctic Ocean moves over to Greenland and gives you surface melt at the Greenland ice sheet [equals 23» of sea level rise] to an extent that didn't used to happen.
The average albedo for the Earth is about 37 percent.
Sulphur aerosols can remain airborn for months to several years, during which time they lower the average albedo and thus reflect sunlight back to the cosmos.
«The increased open water lowers the average albedo [reflectivity] of the planet, accelerating global warming; and we are also finding the open water causing seabed permafrost to melt, releasing large amounts of methane, a powerful greenhouse gas, to the atmosphere.»
In both studies, the researchers used a conservative assumption of increasing the average albedo (solar reflectance) of all roofs by 0.25 and of pavements by 0.15.
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