Discussion 2
Wednesday 2/6Quiz prep + lecture 4
• Atmospheric composition• Atmospheric evolution – deep time, recent
CO2, CH4, 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
N2
O2
Ar
O3
Inert gasesCO2
H2
←SO2, NO2,CFC’s, etc
PM
COCH4
N2O
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
20 )1( eA RQE
Simple Greenhouse Model
24 4 eeR RTE
4
)1( 04
Q
Te
But this doesn’t factor in the atmosphere! 254K vs 288K
Project 1 – Hurricane Sandy
Project 1 – Hurricane Sandy