Define air pressure. Why does it always decrease with increasing height?, meteorology questions help

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Please answer each question in 3-5 complete sentences. Responses are due Friday (November 4) by 11:59 P.M.1. Define air pressure. Why does it always decrease with increasing height?2. What is the highest elevation you have ever been to? Estimate the corresponding station pressure there (hints: air pressure drops 10 millibars for every 100 meters; 1 meter = 3.3 feet).3. What is the general name of the instrument used to measure air pressure? Give two types and explain how each one works.4. What are the names of the instruments used to measure wind direction and wind speed? How does each work? Is there an instrument that can be used to measure both of these atmospheric variables? Explain. ———–also, u have to finish the upload files questions.

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Metr 10: Activity 6
Due: Thursday, November 3rd, 2016 (at 11:59 P.M.)
Submit electronically via Canvas (.doc, .docx, or .pdf file format).
Email or see me in office hours if you have questions.
Please answer all questions in complete sentences.
Each question is worth 1 point (15 points total for this activity).
1. Why is the decrease of air pressure with increasing altitude less rapid when the air is warm
compared to when it is cold?
2. What is the value of standard sea-level pressure in millibars? In inches of mercury? In
hectopascals?
3. Would a sea-level pressure of 980 millibars be considered high or low pressure? Explain why.
4. How is sea-level pressure different from station pressure? Can the two ever be the same? Explain.
5. Why will Denver, Colorado always have a lower station pressure than San Jose, California?
6. On an upper-level weather map, is cold air aloft associated with low or high pressure? How about
for warm air aloft?
7. How would a strong pressure gradient appear on a weather map, with respect to spacing of the
isobars?
8. What are the four forces that affect the horizontal movement of air?
9. What is the name of the force that initially causes air to move horizontally (and is responsible for
the formation of horizontal wind)?
10. What does the Coriolis force do to moving air in a) the Northern Hemisphere? b) the Southern
Hemisphere?
11. If clouds overhead are moving from south to north, would the upper-level center of low pressure
be to your east or west?
12. On an upper-level weather map, why do winds blow parallel to (height) contour lines?
13. On a surface weather map, why do surface winds actually cross the isobars, as opposed to blow
parallel to them?
14. Explain why, on a clear day, an aneroid barometer would indicate “stormy” weather when taken
to the top of a mountain.
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15. Convert each of the following wind directions given in meteorological degrees to compass
directions:
a) 45°
b) 180°
c) 0°
d) 337.5°
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