Answer:
he salinity decreases as we move closer to the equator due to the rains the region consistently receives
Explanation:
What is the reason for the fact that higher average surface densities are found in Southern Hemisphere? cold ice cap of Antarctica chills the surrounding water. Little runoff from Antarctica, formation of sea ice enhances increase in density also.
When it comes to the Earth's atmosphere, there is a difference in the amount of air that is present at different latitudes. This difference in air mass leads to different surface pressure and, in turn, to differences in air density.
As a result, there are differences in surface density between the Northern and Southern Hemispheres. In this answer, we will explore the reasons behind the fact that higher average surface densities are found in the Southern Hemisphere.
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The Coriolis effect is one of the primary causes of the increased surface density in the Southern Hemisphere. The winds rotate in a clockwise direction around high-pressure systems in the Southern Hemisphere as a result of this effect, which is brought on by the rotation of the Earth.
The air is forced to condense as a result of this rotation, which raises its surface pressure and density. Winds in the Northern Hemisphere rotate in the opposite direction of high-pressure systems, causing air to diverge and drop in surface pressure and density
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The ocean currents are another element that contributes to the higher surface density in the Southern Hemisphere. The Antarctic Circumpolar Current (ACC), a circular movement of ocean currents in the Southern Hemisphere, circles Antarctica.
The warmer waters from the north are kept from mixing with the cooler waters from the south by this current, which serves as a barrier. The outcome is colder and denser water in the Southern Hemisphere. Higher surface densities result from this variation in ocean temperature and density's impact on the atmosphere above.
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The difference in surface density between the Northern and Southern Hemispheres is also influenced by mountains. In comparison to the Northern Hemisphere, the Southern Hemisphere has a greater proportion of its landmass covered by mountains.
The air flow is blocked by the steep terrain, which raises surface pressure and density. The effect is further enhanced by the fact that mountains in the Southern Hemisphere are typically higher than those in the Northern Hemisphere.
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In conclusion, there are a number of reasons that contribute to the Southern Hemisphere's higher average surface densities when compared to the Northern Hemisphere.
In the Southern Hemisphere, the Coriolis effect causes the winds to converge around high-pressure systems, increasing surface pressure and density.
The Antarctic Circumpolar Current keeps warmer and colder waters from mixing, resulting in colder, denser, and more dense seas with higher surface densities.
Finally, the Southern Hemisphere's higher proportion of mountainous topography produces a barrier that obstructs airflow, increasing surface pressure and density.
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