Terms in this set (12) A poleward-moving ocean current is considered a warm current.

What is considered a warm current?

A warm current is moving away from the Equator toward the poles. The water in a warm current is warmer than the surrounding water.

What is the role of thermohaline circulation?

Thermohaline circulation plays an important role in supplying heat to the polar regions. Therefore, it influences the rate of sea ice formation near the poles, which in turn affects other aspects of the climate system (such as the albedo, and thus solar heating, at high latitudes).

Are offshore man made rock barriers that run parallel to the beach?

Seawalls are structures built of concrete, wood, steel or boulders that run parallel to the beach at the land/water interface. They may also be called bulkheads or revetments.

Which ocean condition would result in downwelling?

Downwelling occurs in areas such as in the subpolar gyre of the North Atlantic where several surface currents meet, where cold waters meet warmer waters, such as along the outermost boundary of the Southern Ocean where cold Antarctic water sinks below warmer South Pacific and South Atlantic waters.

What provides the energy that drives surface ocean currents such as the Gulf Stream?

Surface currents in the ocean are driven by global wind systems that are fueled by energy from the sun. Patterns of surface currents are determined by wind direction, Coriolis forces from the Earth’s rotation, and the position of landforms that interact with the currents.

What are warm and cold ocean currents?

They can be cold, warm, and hot. Warm ocean currents originate near the equator and move towards the poles or higher latitudes while cold currents originate near the poles or higher latitudes and move towards the tropics or lower latitudes. The current’s direction and speed depend on the shoreline and the ocean floor.

Which of the following ocean currents is a warm current?

The correct answer is Kuroshio current. Kuroshio current is a warm current.

Which one is a warm ocean current?

The Gulf stream is the warm ocean current.

Which ocean currents are categorized as thermohaline?

This highly simplified cartoon of Atlantic currents shows warmer surface currents (red) and cold north Atlantic Deep Water (NADW, blue). The thermohaline circulation heats the North Atlantic and Northern Europe. It extends right up to the Greenland and Norwegian Seas, pushing back the winter sea ice margin. (From [3].)

How thermohaline circulation in the ocean occur?

Thermohaline circulation begins in the Earth’s polar regions. When ocean water in these areas gets very cold, sea ice forms. These deep-ocean currents are driven by differences in the water’s density, which is controlled by temperature (thermo) and salinity (haline). This process is known as thermohaline circulation.

What is the difference between ocean current wind driven circulation and thermohaline circulation?

The wind-driven circulation is the more vigorous of the two and is configured as gyres that dominate an ocean region. The thermohaline circulation is more sluggish, with a typical speed of 1 cm (0.4 inch) per second, but this flow extends to the seafloor and forms circulation patterns that envelop the global ocean.

How do barrier islands move?

Barrier islands form as waves repeatedly deposit sediment parallel to the shoreline. As wind and waves shift according to weather patterns and local geographic features, these islands constantly move, erode, and grow. Beach dunes and grasses on barrier islands absorb wave energy before the wave hits the mainland.

What are offshore breakwaters?

Offshore breakwaters are usually adopted to protect a harbour, anchorage or mooring areas and as. an erosion mitigation and shoreline stabilisation/protection measure: 鈥 To protect a basin or area of shoreline from waves, breakwaters are designed to reflect or.

What is a beach barrier?

Barrier beaches are narrow, low-lying strips of beach and dunes that are roughly parallel to the coastline and are separated from the mainland by a body of water or wetland.

What is a downwelling current?

Downwelling occurs where surface currents converge. The converging water has nowhere to go but down, so the surface water sinks. Since surface water is usually low in nutrients, downwelling leads to low productivity zones.

Where does most downwelling occur?

Where does most downwelling occur? Most downwelling happens at the poles. There, cold air chills the water. The water brought in by the surface gyres is pretty salty already, because it comes from the tropics, where evaporation increased salinity.

How does downwelling affect climate?

Downwelling reduces biological productivity and transports heat, dissolved materials, and surface waters rich in dissolved oxygen to greater depths. This occurs along the west coast of Alaska in the eastern boundary region of the Gulf of Alaska gyre (driven by winds in the Aleutian low).