sample essay test 2

sample essay test 2 - 1. We have discussed several...

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mapped - lightning worldwide, USA frequency of thunderstorms, and USA locations of severe tornadoes. Describe these mapped distributions and then provide your thoughts on some reasons for the patterns. The storms all occur in the southeast of the US because of the gulf atlantic air mass. -    mT Gulf/Atlantic air mass is particularily unstable and active from late spring to early  fall. Causes a lot of the weather variations.  The m T Pacific is stable to conditionally  unstable and generally lower in moisture content and available energy  -    When an air mass passes from a maritime source region to a warmer continental  region, heating from the warmer land causes lifting and convection in the air mass. If  conditions are unstable, initial lifting continues and clouds develops.   Convectional  precipitation also dominates along the ITCZ, over tropical islands, and  anwhere that moist, unstable air is heated form below or where the inflowing trade winds  produce a dynamic convergence.  -    For air masses to cool adiabatically and to reach the dew point, saturate, condense,  form clouds, and perhaps precipitate, they must lift and rise in altitude.  -    In the tropics convergent lifting of warm, moist air produces disturbances that can  lead to the development of a tropical storm. All along the equatorial region, the SE and  NE trade winds converge, forming the intertropical convergence zone (ITCZ) and areas  of extensive uplift, towering cumulonimbus cloud development, and high average annual  precipitation  -    The physical presence of a mountain acts as a topographic barrier to migrating air  masses. Orographic lifting occurs when air is forcibly lifted upslope as it is pushed  against a mountain.  The lifting air cools adiabatically. Stable air forced upward in this  manner may produce stratiform clouds, whereas unstable or conditionally unstable air  usually forms a line of cumulus and culumonimbus clouds. An orographic barrier  enhances convectional activity and causes additional lifting during the passage of weather  fronts and cyclonic systems, thereby extracting more moisture from passing air masses. 2. Climate changes at local and global scales. What happened to temperatures in the 20 th century worldwide? What is some of the evidence to support these changes? What are scientists saying about the future of water due to climate change here in the SW USA? Yes, many observations indicate that the world's climate has changed 
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sample essay test 2 - 1. We have discussed several...

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