26 Jun OCE 1001 Homework Assignment #6 Weather Map
Question
OCE 1001 Homework Assignment #6 Weather Map
Student Name:
Due to the fact planet Earth spins on its axis, the Coriolis effect results in weird responses to
wind fields in pressure fields. By now, you should be familiar with contour maps. In a previous
homework assignment, the contours were constant heights above sea level or constant depths
below sea level. Here the contours represent constant pressures or isobars. The areas denoted by
the Capital H represent high-pressure areas and the areas denoted by the capital L represent lowpressure areas. If Earth did not spin, the wind field from Albany, NY to Dallas, TX, for example,
would be almost a straight line, since high pressure always wants to flow directly to low
pressure. This is not the case on Earth. Read the section in Chapter 8 related to the Coriolis effect
to determine how winds would move in the example below. Refer to Figure 6.14 on page 177 in
your textbook, which provides a good illustrate of air flow around high- and low-pressure
regions.
1
For each of the following cities, fill in which direction the winds are coming from (i.e., from the
north, from the southeast, etc.) (12 points each, 48 points total).
Question
1. Seattle, WA (12 points)
2. Bismarck, ND (12 points)
3. Albany, NY (12 points)
4. Dallas, TX (12 points)
Answer
Recall from a previous homework assignment (topography) the question about contours and
which hill had the steepest slope. To determine this, you simply looked to see which contour
lines were closest together. The same idea holds true here. Where you see contour lines closer
together, the wind fields are stronger. In this case, the lines are isobars: lines of equal pressure.
2
From the map above, place the four (4) cities in order of least windy to most windy (44 points
total, 11 points each).
Question
1. Least windy (11 points)
2. Second least windy (11 points)
3. Second most windy (11 points)
4. Most windy (11 points)
Answer
For all low and high-pressure systems, what general direction will they travel across the central
United States? (8 points)
General direction
3
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