Nevertheless, if convective clouds form during a sunny day, they can often be observed growing in size and getting taller as more and more air rises from the surface and condenses higher up into the cloud.
Ocean currents act as conveyor-like circulations which help distribute heat away from the equator and nearer the poles. However, these currents are affected by convection due to the influence of ocean temperature and salinity concentration of salt within the water on density. Warm ocean waters near the equator are pushed polewards with prevailing wind patterns, and are carried into the higher latitudes where they are cooled through evaporation and the interaction with the colder winds.
Consequently, salinity increases and temperature decreases, causing the waters to become denser and therefore sink through the convection process. This sinking process is known as downwelling, and is vital in driving ocean currents by feeding water into the deep water currents which transports it back to the tropics. What is convection? How does convection work? Why does convection occur? This convection produces winds and ocean currents. The greater the pressure differences between a low-pressure area and a high-pressure area, the stronger the winds.
Additionally, what do convection currents cause? Convection currents are the result of differential heating. Lighter less dense , warm material rises while heavier more dense cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth. The unequal heating of Earth is the driver of atmospheric convection currents.
These air circulation patterns are further modified by the deflecting action of the Coriolis effect. The tilt of Earth's axis of rotation causes seasonal changes in temperature and precipitation as Earth orbits the Sun. All wind is caused by the uneven heating of Earth's surface, which sets convection currents in motion. Convection currents on a large scale cause global winds; convection currents on a small scale cause local winds. Convection is the circular motion that happens when warmer air or liquid — which has faster moving molecules, making it less dense — rises, while the cooler air or liquid drops down.
Convection is a major factor in weather. That current can result in wind, clouds, or other weather. Convection currents happen in fluids with a heat source. The core heats up the magma and causes a convection current. When magma comes to the top of the mantle, it pushes against tectonic plates , which are huge slabs of rock which the crust rests on. Convection currents are flowing fluid that is moving because there is a temperature or density difference within the material.
Some currents are caused by convection, while others, called surface currents, are driven by wind. These currents move water all around the earth, bringing warm water to cooler areas and vice versa.
This redistributes thermal energy and causes changes in the weather. Closer to the ocean, the air and water temperature stay pretty balanced because they are constantly exchanging thermal energy. That is why coastal regions usually experience more temperate climates. Scientists use satellites, as well as instruments on boats and buoys in the water, to map surface water temperatures in the ocean.
These maps help us understand the way ocean currents move and how they affect climate. Cancel Download. Presentation is loading. Please wait. Copy to clipboard. Presentation on theme: "6. Download ppt "6. Chapter 18 Section 1.
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