Diagnosing Climate Change ! Intergovernmental Panel on Climate Change " Established 1988 by UN Environment Program (UNEP) & World Meteorological Organization (WMO) " Charged with providing ?scientific consensus? " Collate & summarize evidence " Nobel Peace Prize 2007 # Al Gore too " Reports every 5 - 6 yrs (?90, ?95, ?01, ?07) # Next report scheduled for 2014 Observing Climate Change ! Global average temperature anomaly " Air over continents " Departure from 1961- 1990 mean " Smooth curves are 10-year running averages Atmospheric Carbon Dioxide ! Direct measurements (Mauna Loa, 1958) and bubbles in ice cores indicate 25?30% increase in CO2 since 1850 (Industrial Age) ! Exceeds natural range over last 650KY ! Links between increasing CO2 and increasing temperature 2007 IPCC report http://www.ipcc.ch/ Last 10,000 years Since 1850 Regions of warming and cooling Temperature Changes by Area IPCC Summary for Policy Makers 2007,
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