ENV100H1 Lecture Notes - Lecture 10: Aerosol, Radiative Forcing, Carbon Cycle
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ENV100H1 Full Course Notes
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2016-04-06 (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) They tend to reflect sunlight back into space. When it is reflected, has a cooling effect. Summers and climate has cooled down in some years. Comparing gwp of all ghg compared to co2. Pre industrial time and after (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) In jan, co2 concentration hit over 400 ppm. In 100 years, gwp is 1 for co2. Concentrations are also high, and has inceased by at least double. However, it is in parts per billion (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) Not only is it increasing, rate at which it is increasing is also accelerated (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) In 1960s, atmospheric co2 increased by < 1 ppm per year. By 1980s, avg annual increases were about 1. 5. Annnual increase has now exceed 2ppm for 2000-2008.
