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13 describe how a high pressure system at the surface

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13. Describe how a high pressure system at the surface strengthens and weakens. 14. The upper level wind field is ultimately responsible for the strengthening and weakening of low-level pressure systems. (True / False) 15. Inward spiraling and rising air from surface convergence is associated with _____ low ______ pressure systems while outward spiraling and sinking air from surface divergence is associated with ___ high ______ pressure systems. GE101 – Natural Environment: The Atmosphere Study Guide Worksheet Lecture 10 – Circulation of the Atmosphere Complete the following worksheet using the Lecture 10 slides and 184-201 in the textbook. 1. The Hadley Cell, Ferrel Cell and Polar Cell are all examples of ( planetary , synoptic, mesoscale) flow features within the atmosphere. 2. Describe the three-cell model of the Earth’s global circulation pattern. Which cell is ultimately responsible for the entire system? Hadley cell: 0-30, 3. How do Hadley Cells develop?
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Insolation is strongest when directly overhead, so the surface and atmosphere at the Equator are more heated than other places on this featureless Earth. When this air is heated, two thermal circulations form (Hadley cells) in the northern hemisphere and southern hemisphere. 4. Within the Hadley Cell, air rises above the _____ equatorial regions _________ and sinks above the ___ subtropical belts _________ creating a three-dimensional circulatory cell. 5. _______ trade winds __________ are created at the surface to return sinking air at the Subtropical Highs to the Equatorial Trough. 6. Coriolis force is responsible for creation of the Northeast and Southeast Trade Winds in the Northern and Southern Hemisphere by deflecting the wind. ( True / False) 7. Complete the blank diagram below, draw and label symbols and arrows of the following to create a Hadley Cell Circulation. Your drawing should look similar to Figure 7.1 on page 184. Equatorial Low (L) Subtropical High (H) Low-level convergence Low-level divergence Northeast trade winds Southeast trade winds Areas of rising motion Areas of sinking motion Upper level convergence Upper-level divergence 30°S 30°N Subtropical High Equatorial Low Subtropical High 8. How do Ferrel Cells and Polar Cells develop in the midlatitudes and high latitudes? As the midlatitude westerlies meet northerly and easterly polar winds, the convergence causes air at the surface to rise. As the air rises, it eventually moves poleward where it feeds into the descending air over the polar regions, as well as equatorward, where it joins the descending air over the subtropics.
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9. The ____________________________________________ are created when air divergences at the Subtropical Highs and moves northward or southward toward the Subpolar Lows. 10. The polar front is typically found in the vicinity of the Subpolar Lows. (True / False) 11. Describe how the polar easterlies are created between the Polar Highs and the Subpolar Lows.
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