WWK?. What kind of activities result in significant changes in Earths climate. The Forces in Nature.
What kind of activities result in significant changes in Earths climate
Natural events are some of the most powerful and destructive forces in nature. We witness and hear about these natural catastrophes all the time, but do we know what causes them? What do they do besides destroy? Today you will learn how such events can alter and affect the Earth and its climate. By the end of this PowerPoint you should know about….
Disasters to Learn About…- Tornadoes and Cyclones- Thunderstorms - Hurricanes
A tornado is a violent, dangerous, rotating column of air that is in contact with both the surface of the earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. They are often referred to as a twister or a cyclone, although the word cyclone is used in meteorology in a wider sense, to name any closed low pressure circulation. Out of all the natural disasters listed, tornadoes and cyclones are rated the highest in destructive force due to their ability to easily tear through most, if not everything, that is placed in their way. A mesocycloneis a vortex of air, approximately 2 to 10 miles in diameter (the mesoscale of meteorology), within a convective storm. That is, it is air that rises and rotates around a vertical axis, usually in the same direction as low pressure systems in a given hemisphere. They are most often cyclonic, that is, associated with a localized low-pressure region within a severe thunderstorm.
Thunderstorms are a form of weather characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder. They are usually accompanied by strong winds, heavy rain and sometimes snow, sleet, hail, or no precipitation at all, and those that do include hail are commonly known as hailstorms. Although thunderstorms are not very dangerous, they are known to cause around 1% of all tornadoes and usually accompany other natural disasters.
Doppler Radars (specialized radar that makes use of the Doppler effect to produce velocity data about objects at a distance) are used in order to detect such events by beaming signals and examining the changes such upcoming disasters have placed upon them.
A hurricane is a storm system characterized by a large low-pressure center and numerous thunderstorms that produce strong winds and heavy rain. Hurricanes strengthen when water evaporated from the ocean is released as the saturated air rises, resulting in condensation of water vapor contained in the moist air. While a hurricane can produce extremely powerful winds and torrential rain, they are also able to produce high waves and damaging storm surge as well as spawning tornadoes. They develop over large bodies of warm water, and lose their strength if they move over land due to increased surface friction and loss of the warm ocean as an energy source.
The uneven distribution of solar energy on earths surface.
The earth’s axis is hot straight up and down. The earths axis is tilted. Because of this, certain parts of the earth lean towards the sun at different times during the year. This is what causes the changes of seasons.
If you live on a part of earth that is leaned towards the sun, its going to be summer where you are. If you live on an areas leaned away, it is winter where you are. When the earth is going between these two spots, you have equinox, which is the daytime and night time are equal, because the earth is not tilted toward or away from the sun.
Equinoxes and solstices mark when the earth has revolved enough to have a different tilt with the sun, thus changing seasons.
How the atmosphere is heated from earths surface.
How changing surface and ocean conditions effect weather and climate patterns.
El Niño and its effects on the earth.
El Nino place to another by the upwelling or down welling of a fluid, such as air or water.
First signs of el Niño: temperatures in the equatorial pacific.
Rise in surface pressure over Indian ocean, Indonesian, and Australia.
Fall in air pressure over Tahiti in the rest of the central and eastern Pacific ocean.
Trade winds in the south pacific weaken or heightened.
Warm air rises near Peru casing rain in the northern Peruvian deserts.
Warm water spreads from the W. pacific and the Indian ocean to the E pacific takes the rain with it causing extensive drought in the w pacific and rainfall in the normally dry eastern pacific
The formation of air masses and their movement.