SCI201 Lecture Notes - Lecture 14: Thermodynamics, Thermodynamic System, Water Cycle

• School: University of Waterloo
• Department: Science
• Course: SCI201
• Professor: Yuri Leonenko

Document Summary

February 27, 2018 14th lecture (w6 & w7) Temperature decreases as an effect of aerosol from volcanic eruptions (slide 10) Atmospheric aerosols: aerosols are very efficient light scatters, and will reflect (some) sunlight back to space. Increasing levels of aerosols provide a negative forcing (cooling the surface). This is known as the aerosol direct effect: there are some indirect effects. At the heart of every cloud droplet is an aerosol particle, which is essential for its start-up. Aerosol (cid:862)i(cid:374)dire(cid:272)t effe(cid:272)t(cid:863) fro(cid:373) (cid:272)loud (cid:272)ha(cid:374)ges: clouds form by condensation on pre-existing aerosol particles, clean cloud (few particles, large cloud droplets, low albedo, efficient precipitation, polluted cloud (many particles, small cloud droplets, high albedo, suppressed precipitation. Absorbing aerosols warm the climate by absorbing solar radiation. At(cid:373)osphere surrou(cid:374)ds the earth"s surfa(cid:272)e (cid:894)slide 1(cid:895) Evidence of climate change: ocean warming (plus its volume is increasing & sea level is rising, glacier melting, ecosystem changes, changes in the hydrologic cycle.