ENVIRSC 1C03 Lecture Notes - Lecture 6: Radiative Forcing, Unit, Livestock Grazing Comparison
31 Mar 2018
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Flooding (of houses), droughts (affecting agriculture), heavy rainfall (mudflows which destroy settlements), wildfires (loss of timber, loss of property) Anthropogenic climate forcing: a change in climate resulting from human activities at a local and global scale. Change in the chemical composition of the atm since 1750 which has impacted the equilibrium b/w the atm, ocean, and biosphere. S(cid:272)ie(cid:374)tists re(cid:272)o(cid:374)stru(cid:272)ted (cid:272)o(cid:374)ditio(cid:374)s of earth"s at(cid:373) usi(cid:374)g differe(cid:374)t pie(cid:272)es of e(cid:448)ide(cid:374)(cid:272)e called proxies. The conc of co2 for the past 1000 yrs has been determined by measuring the conc of gases trapped in ice cores from polar ice caps. Gases are a re(cid:272)ord of earth"s past at(cid:373) Has been a rapid increase in atm conc of co2 in the past 200 yrs. Has led to an increase i(cid:374) the a(cid:373)ou(cid:374)t of e(cid:374)ergy trapped at the earth"s surfa(cid:272)e. Coal: vehicles; abundance and their energy consumption. La(cid:374)d (cid:272)leari(cid:374)g/deforestatio(cid:374); re(cid:373)o(cid:448)ed co2 si(cid:374)ks fro(cid:373) earth"s surfa(cid:272)e. Similar pattern to co2 over the same time.
