The EPA has a report on climate change indicators in the U.S. See http://www.epa.gov/climatechange/indicators.html where you can download the full report as well as a slideshow found at http://www.epa.gov/climatechange/indicators/pdfs/climate_indicators_slideshow.pdf.
Climate Change Indicators in the United States
NASA – Global Climate Change: NASA’s Eyes on the Earth
NOAA – Global Climate Dashboard
NOAA – Annual State of the Climate Report
NOAA – Arctic Change Indicators
State of California – Indicators of Climate Change in California
Collecting and interpreting environmental indicators play a critical role in our understanding of climate change and its causes. An indicator represents the state of certain environmental conditions over a given area and a specified period of time. Examples of climate change indicators include temperature, precipitation, sea level, and greenhouse gas concentrations in the atmosphere.
EPA’s Climate Change Indicators in the United States (PDF) (80 pp, 13.2MB) report will help readers interpret a set of important indicators to better understand climate change. The report presents 24 indicators, each describing trends related to the causes and effects of climate change. It focuses primarily on the United States, but in some cases global trends are presented to provide context or a basis for comparison. EPA will use these indicators to collect data and generate analyses to:
• Monitor the effects/impacts of climate change in the United States
• Assist decision-makers on how to best use policymaking and program resources to respond to climate change
• Assist EPA and its constituents in evaluating the success of their climate change efforts
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