ENVR 200 Lecture Notes - Lecture 17: Sea Ice
7 Feb 2018
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Document Summary
Europe"s % decreased since mid (cid:883)9(cid:882)(cid:882) while usa % emissions increased. China emissions started increasing over the last 30 years. Chine on the other hand started increasing its emissions quite recently. Best-case scenario (if we stop emitting) we can stabilize our climate at 1. 2/1. 3. Worst case (if things continue as they are) by 2100 we could expect 4 celsius above. Sea ice would become seasonal in arctic by 2060-65. Stabilization of emissions (what we emit) vs. stabilization of concentrations (co2 in the atmosphere) Emitting about 9 gt of carbon (by fossil fuels and land clearance for crops etc. ) and about only 5gt is taken by land and ocean, which leave approx. 4gt of carbon in atmosphere (because of humans) / per year. 4 degrees and more sea levels will rise to the point that every coastal city will be threatened (severe weather events, floods, etc. ) Extreme events are changing in frequency and intensity.
