Why does cold water have more nutrients than warm water?
Also, when surface waters are cold, it is easier for deeper water to rise to the surface, bringing nutrients to sunlit areas where phytoplankton can use them. When surface water is warm, cooler, nutrient-rich water is trapped below. The rising, or upwelling water carries iron and other nutrients from the ocean floor.
Why does upwelling increase biological productivity?
Upwelling occurs in the open ocean and along coastlines. Water that rises to the surface as a result of upwelling is typically colder and is rich in nutrients. These nutrients “fertilize” surface waters, meaning that these surface waters often have high biological productivity.
How can upwellings improve fishing for ocean fishermen?
How can upwellings improve fishing for ocean fishermen? They cause the ocean water to get warmer. They bring nutrients from the cold, deep ocean waters.
Why does upwelling attract huge numbers of fish?
Because the deep water brought to the surface is often rich in nutrients, coastal upwelling supports the growth of seaweed and plankton. These, in turn, provide food for fish, marine mammals, and birds
What are large streams of moving water that flow through the oceans?
A current is a large stream of moving water that flows through the oceans. Unlike waves, currents carry water from place to place. Surface currents move in circular patterns in the oceans. Most currents flow east or west, and then turn back to complete the circle.
What are the 2 main types of ocean currents?
There are two type of Ocean Currents:
- Surface Currents–Surface Circulation.
- Deep Water Currents–Thermohaline Circulation.
- Primary Forces–start the water moving.
- The primary forces are:
- Secondary Forces–influence where the currents flow.
- Solar heating cause water to expand.
What are the 3 factors that influence surface currents?
Surface currents are created by three things: global wind patterns, the rotation of the Earth, and the shape of the ocean basins.
What is responsible for surface currents?
Surface currents in the ocean are driven by global wind systems that are fueled by energy from the sun. Currents may also be caused by density differences in water masses due to temperature (thermo) and salinity (haline) variations via a process known as thermohaline circulation.
What is the most common source of energy for surface currents?
What does a surface current do when it deflects?
The winds pull surface water with them, creating currents. As these currents flow westward, the Coriolis effect—a force that results from the rotation of the Earth—deflects them. These surface currents play an important role in moderating climate by transferring heat from the equator towards the poles
Are surface currents warm or cold?
Surface currents These currents transfer heat from the tropics to the polar regions, influencing local and global climate. The warm Gulf Stream originating in the tropical Caribbean, for instance, carries about 150 times more water than the Amazon River.