Chemistry 2210A/B Study Guide - Midterm Guide: Tropospheric Ozone, Smog, Denitrification
Document Summary
Wavelength regions of incoming radiation (from the sun) and outgoing (from t he earth). 2897/t (in k) = wavelength peak (in nm) from the sun = wavelengths uv, visible and ir peak in visible (400-750nm) from the earth = wavelengths ir (energy absorbed from sun, less emitted hence ir) 50% of sun radiation absorbed (20% ir absorbed by water, co2; uv absorbed by ozone and o2) 30% reflected back into space (70% stay absorbed) = albedo; clouds, snow, ice all reflect light. Water/soil better at absorbing rate of emission of light increases as temperature is raised. Greenhouse effect: greenhouse gases (such as co2, water vapour) capture ir radiation and either re-emits it as ir, or after absorbing emits it as heat. Random and warms air near surfacenatural billions of years. Enhanced greenhouse effect: not so natural, increasing concentration of trace gases in air that absorb ir light , increase surface temperature well beyond 15 degrees.
