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Global Warming Sceptics

Explore temperature cooling phenomena despite rising CO2 levels & debunk climate change skepticism with empirical data. Discover how urban heat islands affect climate analysis & understand the role of CO2 in the Earth's natural greenhouse effect.

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Global Warming Sceptics

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  1. Global Warming Sceptics Bruno Tremblay McGill University bruno.tremblay@mcgill.ca

  2. CO2 rising, Yet the temperature is cooling!!

  3. Cooling Temperature • Punta Arenas temperature record shows cooling • East Antarctica Ice Sheet show slight cooling and growth G http://data.giss.nasa.gov/gistemp/station_data/

  4. Cooling Temperature • Punta Arenas temperature record shows cooling • East Antarctica Ice Sheet show slight cooling and growth G http://data.giss.nasa.gov/gistemp/station_data/

  5. Urban Heat Island Effect Albany New York

  6. McGill vs DorvalUncorrected for UHI

  7. McGill vs DorvalCorrected for UHI

  8. Mean Earth Surface Temperature Beware of axes scale Analysis only including rural area show the same trend Analysis for windy vs non-windy day show the same results Spatial pattern of warming does not follow urbanization pattern – more warming in the polar regions.

  9. Earth Surface Temperature Record Unreliable due to… But… Arctic sea ice extent record Mountain glacier record Snow extent record Ocean temperature record • Urban Heat Island Effect

  10. Arctic Sea Ice Extent

  11. Cretaceous [CO2] was higher than today • Why worry then?

  12. Solar Output and Climate Change No trend in any solar indices, if anything there was a slight negative trend. The difference between solar minimum and maximum in the 11-year solar cycle is 10 times smaller than the effect of Greenhouse gas

  13. CO2 Atmosphere composition Football field 85.0 yards 107.8 yard 108.9 yards 109.99 yards 1.5 inch • N2: 77.31% • O2: 20.74% • Ar: 0.92% • H20: 0.99% • CO2: 0.038%

  14. CO2 is not a dominant GHG The natural greenhouse effect keeps the earth surface 33 C warmer than it would otherwise be. 50% of the greenhouse effect is due to water vapor, 25% is due to clouds, and the remaining 20% is due to CO2

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