A blog that you should really subscribe to and check in on occasionally is RealClimate.
This week’s entry is concerned with – How do Trees Change the Climate? This question will become more important to us as we continue the Ohio tree-ring work – how did the climate change when Ohio was deforested ~200 years ago? or did it change? how would we know and how could we attribute the change to one factor or another? Attribution of climate change is fundamental and it is not always straightforward.