Global Warming Sceptics Bruno Tremblay McGill University

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Presentation transcript:

Global Warming Sceptics Bruno Tremblay McGill University

CO2 rising, Yet the temperature is cooling!!

Cooling Temperature Punta Arenas temperature record shows cooling Punta Arenas temperature record shows cooling East Antarctica Ice Sheet show slight cooling and growth East Antarctica Ice Sheet show slight cooling and growth G

Cooling Temperature Punta Arenas temperature record shows cooling Punta Arenas temperature record shows cooling East Antarctica Ice Sheet show slight cooling and growth East Antarctica Ice Sheet show slight cooling and growth G

Urban Heat Island Effect Albany New York

McGill vs Dorval Uncorrected for UHI

McGill vs Dorval Corrected for UHI

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

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

Arctic Sea Ice Extent

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

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

CO2 Atmosphere composition N2: 77.31% O2: 20.74% Ar: 0.92% H20: 0.99% CO2: 0.038% Football field 85.0 yards yard yards yards 1.5 inch

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