Notes on “Truths and Myths about Global Warming”
Can be cause by sun or greenhouse gases
•Polar areas warming more quickly than middle latitudes
•Winter temperatures rising faster than summer temperatures
Specific to greenhouse gases; not caused by the sun
•Night-time temperatures rising faster than daytime
•Lower atmosphere heating, upper atmosphere cooling
Popular Myths about Global Warming
•Prehistoric climate was much greater than now
•Variation in sunlight
•Will Make next ice age milder
•Good for agriculture
•Preventing global warming impact out economy
Variation in Sunlight?
•If solar variation were the cause, the stratosphere would be warming and nighttime
temperatures would not be rising as fast as the day time temperatures.
•Stratosphere is cooling and night time temperatures are rising faster than the day
Good for Agriculture?
•Rather than carbon dioxide, it is nitrogen, phosphorus and water that usually limit