Continental tropical (cT) air masses are hot, dry, unstable at low levels and generally stable aloft (upper-level ridge); they originate in northern Mexico. Continental polar (cP) or continental arctic (cA) air masses are cold, dry, and stable originating over northern Canada and Alaska as a result of radiational cooling. (Oklahoma Climatological Survey, 2004)" The greenhouse effect has been in the news for the last several decades especially with the resulting

This is above the historical average of 2.5% a year. What this shows is that because the different governments are encouraging the development of the region; many countries are being to see increased economic growth. As the continued investments in these areas, have allowed for the opportunity to increase imports to a number of markets around the world including: China and the United States. ("Latin America at Risk") However, the

He points out that this observation brings together the usually disparate study of deep-seated magmatic processes and land-surface evolution." (Science Daily, 2007) Marsh's study has been conducted in McMurdo's Dry Valleys which is stated to be ideal for the study of these systems "because it was eroded into its present form millions of years ago and has, unlike the rest of the Earth's surface undergone very little subsequent erosion."

Geography Livingstone's Geographical Tradition -- Should the history of geography be rated X This is the first intellectual history of a subject that over the last five centuries has played a significant role in the development of Western civilization. The author describes the activities of the explorers and map-makers of Renaissance and early modern Europe; the role of geography during the Scientific Revolution, the Enlightenment and the Darwinian Revolution; and the interactions

Geography - GIS Systems Geographic information systems called GIS in short, is a constituent of all the complex geographic information technologies that exist today. The Global Positioning System or GPS and remote sensing are all parts of the emerging technologies that are today referred to as GIS systems. GIS thus encompasses both the digital and geographical techniques involved in the systems used for the processing and dissemination of geographic information. (New

Here, the mass of water is being pulled upward toward the atmosphere by its attraction to the moon. As it does so, the tide is pulled inward from the coastlines contained the body of water. As the moon moves closer to the earth during its daily rotation, the magnetic pull lessens. The diminished pull causes the bulge to decline, pushing the body of water outward and extending the coastlines. It