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AGU journal highlights -- Aug. 6, 2009
Date:8/6/2009

rences in the implementation of the LCC, different land surface models, and different ways of representing the landscape. The researchers conclude that it is essential to include LCC in future regional and global climate studies but that it is not feasible to impose them in a common way across multiple models for the next Intergovernmental Panel on Climate Change assessment.

Title: Uncertainties in climate responses to past land cover change: First results from the LUCID intercomparison study

Authors: A. J. Pitman: Climate Change Research Centre, University of New South Wales, Sydney, New South Wales, Australia, and collaborators (for complete list see online abstract at link below.)

Source: Geophysical Research Letters (GRL) paper 10.1029/2009GL039076, 2009; http://dx.doi.org/10.1029/2009GL039076


7. An overview of global dimming and brightening

Radiation from the Sun fuels life on Earth and determines the climate of its inhabitants. The amount of radiation that reaches the Earth's surface helps to control evaporation rates, snow and glacier melt, carbon uptake through plant photosynthesis, the severity of seasons, and agricultural productivity. Thus changes in the amount of solar energy reaching the Earth can affect society, the environment, and the economy. A growing body of evidence supports that human interference has affected the amount of solar radiation that is able to penetrate the atmospherein general, aerosol pollutants have been shown to scatter or absorb incoming solar radiation and increase the reflectance and lifetime of clouds, thereby reducing the amount of solar radiation reaching the Earth's surface. Dubbed "global dimming," this phenomenon has been countered in the past few decades by "global brightening" as pollution control efforts have met with success. Wild reviews the evidence surrounding global dimming and brighteni
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Contact: Maria-Jose Vinas
mjvinas@agu.org
202-777-7530
American Geophysical Union
Source:Eurekalert

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