BIO220H1 Lecture Notes - Lecture 22: Numerical Weather Prediction, Milankovitch Cycles, Ice Core
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BIO220H1 Full Course Notes
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An ice age has alternating glacial and interglacial periods below are below average temperatures. These are series of estimates of changes in temperature expressed as deviations from long term baseline average (0) Temperature estimates from isotope signals in: points above 0 above average; points the ice core volatile, vostok ice core our best record. Long-term predictions: exit the current interglacial in 10 to 50 thousand years, glaciers return, sea level drops and canada is gone, but the short-term prediction is very different, due to human activity. Changes in temperature, co2, npk and etc. , overwhelms the natural cycle. Humans are warming up the earth while we should be in the cooling phase". Svante arrhenius (1859-1927: arrhenius calculated overall effects of co2 as a greenhouse gas, doubling of atmospheric [co2] should cause global temperature to increase 4c. Concluded that alternating glacial and interglacial periods were due to this.
