Lab 4B
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University of Houston Downtown *
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Course
1304
Subject
Geography
Date
Dec 6, 2023
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docx
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3
Uploaded by ChiefHerringPerson172
1.The straight line across the map's mid-section represents the equator. Longitude is measured
in 15° intervals. Latitude is measured in 10° intervals. In Figure 4B-1, the expansive regions of
the ocean in red represent areas where evaporation exceeds precipitation by 4 mm/day. This
region is centered at about ______°N and S. (Click on the map to open a larger version in a new
browser.):
15-25
2. Regions where precipitation exceeds evaporation are colored pink, purple, and dark blue. The
region where freshwater flux is the most negative is ______:
between 10°S and 10
3. The greatest positive values of E - P reflect a climate that is dominated by atmospheric
______. Refer to Figure 4.28 of planetary-scale surface circulation of the atmosphere in your
textbook:
subtropical anticyclones centered near 30° latitude.
4. The western equatorial Pacific Ocean produces E - P values close to ______:
-10mm/day.
5. The subtropical ocean gyres of the Pacific Ocean experience E - P values close to ______:
+5 mm/day.
6. Figure 4B-1 shows the most negative values of E - P in the Atlantic Ocean, as well as the
eastern and central Pacific Ocean basins, generally positioned ______ the equator. Greater
precipitation and less evaporation generally coincides with the location of the intertropical
convergence zone (ITCZ) where the trade winds of the two hemispheres converge and trigger
development of a discontinuous east-west band of showers and thunderstorms:
North of.
7. The Southern Ocean has an E - P value close to ______:
-2 mm/day
8. Compare Figure 4B-2, depicting mean annual salinity, with Figure 4B-1, displaying average
annual E - P values. This comparison shows that, in general, regions of the ocean with high
surface salinities are associated with areas where ______:
E>P
9. Comparing Figure 4B-1 and Figure 4B-2 also shows that those regions of the ocean with low
surface salinities are generally associated with areas where ______:
E<P
10. Figure 4B-2 shows the highest surface ocean salinity values occur in the ______ Ocean:
Atlantic
11. Ocean salinity is also affected by freshwater influx from rivers. Referring to Figure 4B-2,
which river has the greatest effect on ocean water salinity?:
Ganges river flowing from India into the Bay of Bengal
12. Water vapor transported east to west by the atmosphere across the Isthmus of Panama in
Central America contributes to the fresh water, delivered by precipitation, resulting in a salinity
value of ______:
31
13. Figure 4B-3 shows that across the central and eastern tropical Pacific Ocean, precipitation is
highest ______ the equator:
north of
14. The purple and blue regions coincide with the center of ocean gyres in each ocean basin.
What can you infer from this data pattern?:
Precipitation is high, so salinity is low
15. Compare the average rainfall for February (Figure 4B-4) and August (Figure 4B-5). The band
of heavy precipitation is most prominent ______ in February:
Along
16. In August, the belt of maximum average precipitation in the Pacific Ocean is located ______:
North of
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