ENGR 202 Lecture Notes - Lecture 12: Radiative Forcing, General Circulation Model, Halocarbon

• School: Concordia University
• Department: Engineering
• Course: ENGR 202
• Professor: Gad Saad

Document Summary

Carbon dioxide (co2) biggest cause of ghg effect, comes from fossil f combustion. Methane (ch4) decomposing landfill, animal digestive tracts, gas production and coal. Nitrous oxide (n2o) nitrogen containing chemical fertilizers. Cfc-11, 12, 113 halocarbons, refrigeration systems and aerosol cans, banned. Hcfc-22 pe(cid:396)haloge(cid:374)s, i(cid:374)dust(cid:396)ial appli(cid:272)atio(cid:374)s, i(cid:374)(cid:272)(cid:396)eased afte(cid:396) (cid:271)a(cid:374) of cfc"s. Atmospheric absorption of outgoing ir radiation from earth. The energy absorbed will reradiate back to earth by greenhouse gas molecules. Warms earth beyond equilibrium of -19 deg(cid:396)ees celsius. P(cid:396)ese(cid:374)tl(cid:455), ghg"s (cid:396)espo(cid:374)si(cid:271)le fo(cid:396) a (cid:449)a(cid:396)(cid:373)i(cid:374)g of (cid:1007)(cid:1008) deg(cid:396)ees celsius. This is therefore a natural occurrence to have in order for life to exist as it is now on ea(cid:396)th. The p(cid:396)o(cid:271)le(cid:373) is that ghg"s a(cid:396)e i(cid:374)(cid:272)(cid:396)easi(cid:374)g (cid:449)hi(cid:272)h su(cid:271)se(cid:395)ue(cid:374)tl(cid:455) is i(cid:374)(cid:272)(cid:396)easi(cid:374)g the temperature of the earth. This is the environmental concern we face and what needs to be done is a stabilization of greenhouse gasses.