Link list on albedo and albedo changes

 
Reflection and absorption
 

How does light work? These pages give a basic introduction of what light is and how it interacts with matter. They are helpful as an introduction:
http://www.howstuffworks.com/light.htm

See a 5 mins film yon YouTube explaining absorption and reflection of light:
http://www.youtube.com/watch?
v=nkwdvqIQaNI

The following page gives a definition of terms and an overview how light interacts with matter and water on a slightly more technical level:
http://www2.dmu.dk/rescoman/
Scanner/Scan/airborne.htm 

Albedo of the Earth
 

The ESPERE climate encyclopaedia gives an introduction to the albedo and compares albedos of different surfaces:
http://www.atmosphere.mpg.de/enid/25w.html

You may also compare the explanation in Wikipedia:
http://en.wikipedia.org/wiki/Albedo 
 

The albedo of the Earth changes with the seasons. It is shown here in an animation:
http://profhorn.meteor.wisc.edu/wxwise/
AckermanKnox/chap2/Albedo.html

… and for recent years also in NASA visualisations:
http://eosweb.larc.nasa.gov/HPDOCS/misr/
misr_html/global_seasonal_albedo.html
 

Land cover and albedo changes
 

When ice melts and turns into ocean water, the albedo decreases stepwise. See a graphic from UNEP:
http://maps.grida.no/go/graphic/
albedo-of-basic-thick-sea-ice-surface-types

Various films from NASA illustrate the role of the cryosphere in the Earth’s radiation budget:
http://www.nasa.gov/centers/goddard/
earthandsun/climate_change_prt.htm

Turning subpolar grasslands into forest may even lead to albedo changes, which offset the effect of the biomass’ carbon dioxide uptake.
Read this interesting letter to Nature:
http://www.nature.com/nature/journal/
v408/n6809/full/408187a0.html
 

Aerosols, cloud cover and albedo changes
 

The following ESPERE page explains the direct and indirect effect of aerosols on light coming from the sun.
http://www.atmosphere.mpg.de/enid/29a.html

NASA reports that the aerosol dimming of our Earth has decreased:
http://www.nasa.gov/centers/goddard/
news/topstory/2007/aerosol_dimming.html
 

Interesting trends of the Earth’s albedo have been discovered with the help of the moon:
http://wattsupwiththat.wordpress.com/2007/10/17/
earths-albedo-tells-a-interesting-story/

Increasing the reflexion of sunlight by means of particles has been discussed in the context of geoengineering. Although the following block is not a scientific article, you may have a look on it to get an idea.
http://theblanketeffect.blogspot.com/
2007_01_04_archive.html