Currents involve movement of ocean water masses, driven either by wind or by differences in temperature, salinity and density. The most important from a human perspective are the wind-driven surface currents that move water in the uppermost layer of the ocean.
Currents affect humans in several primary ways. Currents help shape the climate in the areas where we live, create the right conditions to support abundant ocean life in the areas where we fish, and change weather patterns through periodic events like El Nino/La Nina.
Ocean currents also cause upwelling in many areas like off in the inland parts of North America, where surface currents taking water away from the shore cause nutrient-rich water to well up from the ocean deeps. The abundance of nutrients in these areas forms fertile ground for kelp beds and marine fisheries, which in turn furnish food for humans. Alterations in current patterns like the El Nino/La Nina cycle affect humans as well by causing changes in local weather patterns in the years when they occur.
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It radically altered the geography of North America north of the Ohio River. At the height of the Wisconsin Episode glaciation, ice covered most of Canada, the Upper Midwest, and New England, as well as parts of Montana and Washington.
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The area in the north pacific that have the densest population is : Vancouver
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The Ottoman Empire can undoubtedly be called the greatest Muslim empire of all time because it stayed on the face of the globe for nearly 700 years. The empire was one of the largest and the longest ruling empire in history.
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The day/night temperature difference is much larger on land than the ocean because (c) the ocean has a larger heat capacity.
Explanation:
The ocean has a remarkable capacity to store heat. This is why its temperature is more stable than on land. Solar energy is gradually absorbed through the surface to the depth and that energy is moved around with their currents.
Ocean water can store huge amounts of solar energy, that is, from heat, which is released progressively. This property is what makes the ocean the great climate regulator and, therefore, two extreme types of climate can be recognized: the maritime and the continental.
The surface of the continents does not store large amounts of heat, and therefore, its thermal reserve is very scarce, so that the soil heats up very quickly during the day, but at night it cools in the same way. The heat has no time to penetrate the earth.
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