Richmond Assesment

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by hrichmond
Last updated 6 years ago

Discipline:
Science
Subject:
Earth Sciences

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Richmond Assesment

Ice Storm- The formation of ice begins with a layer of above-freezing air above a layer of sub-freezing temperatures closer to the surface. Frozen precipitation melts to rain while falling into the warm air layer, and then begins to refreeze in the cold layer below.

Tornado- As the mesocyclone lowers below the cloud base, it begins to take in cool, moist air from the downdraft region of the storm. This convergence of warm air in the updraft, and this cool air, causes a rotating wall cloud to form.

Types of Weatherby Hunter Richmond

http://en.wikipedia.org/wiki/Ice_storm#mediaviewer/File:Ice_storm.jpg

As the force of wind passing over loosely held particles increases, particles of sand first start to vibrate, then to leap. As they repeatedly strike the ground, the loosen and break off smaller particles of dust which ten begin to travel in suspension. At wind speeds above that which causes the smallest to suspend, there will be a population of dust grains moving by a range of mechanisms: suspension, saltation, and creep.

Waterspout- Waterspouts exist on a microscale, where their environment is less than two kilometers in width. The cloud from which they develop can be as innocuous as a moderate cumulus, or as great as a supercell.

http://en.wikipedia.org/wiki/Waterspout#mediaviewer/File:Trombe.jpg

]http://en.wikipedia.org/wiki/Tornado#mediaviewer/File:Seymour_Texas_Tornado.jpg

Hurricane- Worldwide, tropical cyclone activity peaks in late summer, when the difference between temperatures aloft and sea surface temperatures in the greatest. However, each particular basin has its own seasonal patterns. On a worldwide scale, May is the least active month, while September is the most active month. November is the only month in which all the tropical cyclone basins are active.

http://en.wikipedia.org/wiki/Tropical_cyclone#mediaviewer/File:Hurricane_Isabel_from_ISS.jpg

Firestorm- A firestorm is a conflagration which attains such intensity that is creates and sustains its own wind system. It is most commonly a natural phenomenon, created during some of the largest bush fires and wildfires.

http://en.wikipedia.org/wiki/Firestorm#mediaviewer/File:View_of_Tillamook_Fire,_Oregon_from_airplane_-_NARA_-_299308.jpg

Downburst- The formation of a downburst starts with hail or large raindrops falling through drier air. Hailstones melt and raindrops evaporate, pulling latent heat from surrounding air and cooling it considerably. Cooler air has a higher density than the warmer air around it, so it sinks to the ground. As the cold air hits the ground it spreads out and a mesoscale front can be observed as a gust front.

http://en.wikipedia.org/wiki/Downburst#mediaviewer/File:Microburst_-_NOAA.jpg

http://en.wikipedia.org/wiki/Extratropical_cyclone#mediaviewer/File:Southern_hemisphere_extratropical_cyclone.jpg

Extratropical Cyclone- Extratropical cyclones form anywhere within the extratropical regions of the Earth, either through cyclogenesis or extratropcial transition. Note the clockwise shape of the cyclone.

http://i.ytimg.com/vi/bDKzWuw0yh4/maxresdefault.jpg

Thundersnow- There are usually three forms of thundersnow: A normal thunderstorm on the leading edge of a cold front or warm front that can either form in a winter environment or one that runs into cool air and where the precipitation takes the form of snow. A heavy synoptic snowstorm that sustains strong vertical mixing which allows for favorable conditions for lightning and thunder to occur. A lake effect or ocean effect thunderstorm which is produced by cold air passing over relatively warm water; this effect commonly produces snow squalls over the Great Lakes

http://en.wikipedia.org/wiki/Dust_storm#mediaviewer/File:Sandstorm_in_Al_Asad,_Iraq.jpg

Winter Storm- A winter storm is an event in which the varieties of precipitation safe formed that only occur at low temperatures, such as snow or sleet, or a rainstorm where ground temperatures are low enough to allow ice to form. In temperate continental climates, these storms are not necessarily restricted to the winter season, but may occur in the late autumn and early spring as well. Very rarely, they may form in summer, though it would have to be an abnormally cold summer, such as the summer of 1816 in the Northeast United States of America.

http://en.wikipedia.org/wiki/Winter_storm#mediaviewer/File:Iced-tree-limbs-in-sun.jpg


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