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Miami Dade College, Miami *

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Course

1210

Subject

Geography

Date

Feb 20, 2024

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png

Pages

1

Uploaded by ChancellorFish4041 on coursehero.com

o000 . A barogra,.l. Bla A lhavacmnaa davidlhad vcamavda dlha havamandila mumamniica avimw dlaaa fa ."“"""ical form . 10. What wi S @ OO T ' 2 @J | @ > + Barographs may be usedto record elevation changes during an aircraft flight. Barographs were required by the FAI to record certain tasks and record attempts associated with sailplanes . 11. Pressure data is taken throughout the world every hour in METARs or some similar weather product. The stations with similar atmospheric pressure are plotted on surface analysis charts, connecting like type pressure stations. What is the name of this chart and how often is it issued? (P34) + Surface analysis charts. They are issued every three hours or eight times a day beginning at 0000Z Universal Coordinated Time (UTC). 12. Define a trough. (P35) + An elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low 13. Cyclones track across the U.S. from west to east and end up in what area of the U.S. and Canada? (P35, Figure 4-6) + They all tend to converge toward Canada's and USA's East Coast. 14. Define aridge. (P36) + Aridge is an elongated area of relatively high pressure extending from the center of a high- pressure region 15. Refer to page 34, top right column. The paragraph talks about the weather map revealing certain weather patterns. It talks about highs, lows and cols. What is a col and what type of weather does it produce? You will have to consult the internet for the answer as this book makes only a general reference to this phenomena. + Acolthe point of intersection of a trough and a ridge. It takes the form of a saddle where the air pressure is relatively higher than that of the low-pressure regions, but lower than that of the anticyclonic zones. In a barometric col, the winds are relatively calm and varying in direction. The weather is also unsettle and favorable for winter fog or summer storms due to the accumulation of moisture in the air mass due to lack of ventilation. It is thus often the position of a stationary or quasi-stationary front . 16. In which direction do tornados spin in the northern hemisphere? (P37) ~+ Tornadoes tend to revolvecounterclockwisein the Northern Hemisphere . 17. Does Coriolis affect an aircraft's flight path and if so, how do pilots correct for it? (Figure 4-8, P37) (You may have to go to the internet for the answer.) + The Coriolis force affects the paths of aircraft; missiles; flying birds; ocean currents; and, most important to the study of weather, air currents. Though the Coriolis effect does affect the airplanes directly, it is negligible.It only amounts to a very small percentage of course variation even over long flights. It has an indirect effect on the flight path by producing various phenomenon related to wind motion such as vortex winds, Jet streams etc. Pilot's must do proper preflight planning to account for the effect of Coriolis on winds over long distance flights 18. In Chapter 4, we learned that the closer the isobars, the stronger the pressure gradient and therefore the stronger the wind speed. Explain how this theory varies with latitude. (P37, lower right column) + The Coriolis effect is zilch at the equator and increases with latitude to a maximum at the poles. Consequently, for a given wind speed, the Coriolis force will be stronger at higher latitudes than at lower latitudes. For a given pressure gradient force (or height gradient), the geostrophic wind is defined to "blow" so that the Coriolis force exactly balances the PGF. Since the Coriolis effect increases with respect to latitude, it follows that for a given PGF, the wind speed needed to produce a balancing Coriolis force must be slower at higher latitudes to compensate for the greater Coriolis effect--that is, the same PGF implies a slower geostrophic wind at high latitudes and a faster geostrophic wind at low latitudes. For a given pressure gradient, as latitude increases wind speed decreases .
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