Could please only answer a,b and c. Thank you! EXERCISE 14.2 Effects of Climate
ID: 118476 • Letter: C
Question
Could please only answer a,b and c. Thank you!
EXERCISE 14.2 Effects of Climate Change on Shorelines Name: Course: Section: Date: (a) what would be the effect on the oceans if continental glaciers worldwide expanded by 10%? Explain. (b) What would be the effect on the world's shorelines if continental glaciers worldwide expanded by 10%? (c) Conversely, what would be the effect on the world's oceans and shorelines if continental glaciers shrunk by 10%? (d) Starting about 2 million years ago, much of northern North America, Europe, and Asia were covered with continental glaciers. In what way was the location of the world's shorelines at that time different from that of today's shorelines? Explain your reasoningExplanation / Answer
First we need to know about continental glaciers. They are large extension of ice sheets that are the largest reservoir of fresh water on earth.
A) Ocean salinity will increase and fall in sea level.
Explanation- Expansion of continental glaciers would suggest that due to global cooling, water is getting converted to ice. Now when saline water freezes, only the water molecules changes state. All the salts gets precipitated out. This results in an increased salinity of the oceans. Again due to this change of state, the sea level will fall.
B) Shorelines will get wider.
Explanation- As the sea level falls, more of the continental shelf will get exposed, resulting in a wider shoreline.
C) Oceans salinity will decrease and shorelines will get narrower.
Explanation- Now if there is a decrease in total volume of ice sheets, it means melting has occurred. This would result in large discharge of fresh water into the oceans. As a result due to dilution, the salinity of the oceans gets reduced. Again due to rise in sea level coasts will get submerged. This will result in narrow shorelines.
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