Discussion 2 Wednesday 2/6 Quiz prep + lecture 4

Atmospheric composition Atmospheric evolution – deep time, recent CO 2, CH 4, CFCs Carbon and hydrological cycles Aerosols Air pressure – Torciello, changes with height, ideal gas law Layers of the atmosphere Temperature, heat transfer, radiation Quiz Topics

N2N2 O2O2 Ar O3O3 Inert gasesCO 2 H2H2 ←SO 2, NO 2, CFC’s, etc PM CO CH 4 N2ON2O Composition of the Earth’s Troposphere

Fig. 1-4, p. 7

Fig. 1-7, p. 9

Fig. 1-3, p. 6 Carbon Cycle

Fig. 1-5, p. 8 Hydrologic Cycle

Fig. 1-5, p. 8 Hydrologic Cycle

Fig. 1-13, p. 15

Fig. 1-14, p. 17

Fig. 2-7, p. 34 ELECTROMAGNETIC SPECTRUM

Insolation Earth’s tilt & the seasons Angle of incidence & solar zenith angle Earth’s energy budget – Insolation and re-radiation – Latitudinal heat balance – The greenhouse effect

Fig. 2-12, p. 42 HEATING OF THE EARTH’S SURFACE DEPENDS ON THE AMOUNT OF SOLAR RADIATION PER UNIT AREA. SAME AMOUNT OF RADIATION IS DISTRIBUTED OVER A LARGER AREA IN A THAN IN B. RADIATION PER UNIT AREA IS LESS IN A THAN IN B. LESS HEATING IN A THAN IN B.

Latitudinal Heat Balance

Simple Greenhouse Model But this doesn’t factor in the atmosphere! 254K vs 288K

Project 1 – Hurricane Sandy