Chapter 6 Atmospheric and Oceanic Circulations Geosystems 6e An Introduction to Physical Geography Robert W. Christopherson Charles E. Thomsen

Atmospheric and Oceanic Circulations Wind Essentials   Driving Forces Within the Atmosphere   Atmospheric Patterns of Motion   Oceanic Currents  

Wind Essentials Air Pressure and Its Measurement Mercury barometer Aneroid barometer Wind: Description and Measurement   Wind Anemometer Wind vane Global Winds  

Barometers Figure 6.2

Air Pressure Readings Figure 6.3

Wind Vane and Anemometer Figure 6.4

Wind Portrait of the Pacific Ocean Figure 6.6

Driving Forces Within the Atmosphere Gravity Pressure Gradient Force   Coriolis Force   Friction Force  

Pressure Gradient Figure 6.7

Pressure + Coriolis + Friction Figure 6.8

Coriolis Force Figure 6.9

500 mb Pressure Map Figure 6.10

Atmospheric Patterns of Motion Primary High-Pressure and Low-Pressure Areas   Upper Atmospheric Circulation   Local Winds   Monsoonal Winds  

Global Barometric Pressure Figure 6.11

Global Barometric Pressure Figure 6.11

Primary High-Pressure and Low-Pressure Areas Equatorial low-pressure trough Polar high-pressure cells Subtropical high-pressure cells Subpolar low-pressure cells

Equatorial Low-pressure Trough Intertropical convergence zone (ITCZ) Trade winds

Polar High-pressure Cells Polar easterlies Antarctic high

Subtropical High-pressure Cells Westerlies Bermuda high Azores high Pacific high Figure 6.14

Subpolar Low-pressure Cells Aleutian low Icelandic low Polar front

General Atmospheric Circulation Figure 6.13

General Atmospheric Circulation Figure 6.13

Constant Isobaric Surface Figure 6.16

Upper Atmospheric Circulation Rossby waves Jet stream

Rossby Waves Figure 6.17

Jet Streams Figure 6.18

Local Winds Land-sea breezes Mountain-valley breezes Katabatic winds

Land-Sea Breezes Figure 6.19

Mountain-Valley breeze Figure 6.20

Monsoonal Winds Figure 6.21

Oceanic Currents Surface Currents   Deep Currents  

Major Ocean Currents Figure 6.22

Deep Currents Figure 6.23

Geosystems 5e An Introduction to Physical Geography End of Chapter 6 Geosystems 5e An Introduction to Physical Geography Robert W. Christopherson Charlie Thomsen