The Intergovernmental Panel on Climate Change (IPCC) has a rich repository of figures and...

The Intergovernmental Panel on Climate Change (IPCC) has a rich repository of figures and data, and because these data are likely to influence some policy actions in your future, it?s worthwhile taking a few minutes to look at the IPCC reports.

The most brief and to the point is the Summary for Policy Makers (SPM) that accompanies the fourth Assessment Report. You can find the summary at www.ipcc.ch/ipccreports/ar4-syr.htm. If you have time, the full report is also available at this site.

Open the SPM and look at the first page of text, then look at the first figure, SPM1 (reproduced here). Look at this figure carefully and answer the following questions:

Why is the trend in the snow cover graph less steep than the trends in the other two graphs?

See the evidence: view the IPCC report at www.ipcc.ch/graphics/graphics/syr/spml.jpg.