PPT-Hot climates: Deserts

Mr Boland Geography Where are deserts found What have all deserts got in Common Where are deserts in the path of the trade winds 15 and 30 degrees north and south of the equator. By:Anthony Aragon . The Desert . Deserts cover about one fifth of the earth’s land area. The desert is a harsh environment with very little rainfall and extreme temperatures.. What makes a Desert?. Factors that influence climate.. 1. Latitude. 2. Distance from sea / ocean. 3. Prevailing winds and air masses. Latitude. Latitude is the distance north or south of the equator.. In general, the further north or south of the equator an area is, the colder it will be.. Chapter Seven. Most of the year the desert looks lifeless.. But when rainy season comes, the land explodes with life.. Plants and animals hurry to feed, grow and reproduce.. When the rain is done life seems to disappear again, until the next rainy season.. By Elisa Miller. Keystone College. Deserts. Types of Deserts:. Hot and . Dry. Cold Deserts. Gobi Desert in Asia. Desert . of . Antarctica. Locations. Cover 20% of the Earth’s land mass. Latitudes: . Francisci. WG.2a. The . low. latitude climates are always . between. the Tropic of Cancer and the Tropic of . Capricorn. .. The climate is . tropical. , wet, hot and . humid. .. Low Latitude Climates. By: Ethan Thimmesch and Eli Bailey. Deserts on earth. Deserts in America. The deserts in America are very hot and dry. There are many different herbivores, carnivores and producers in the desert.. Average rainfall . Climate Change. Kelly Barnhart. Global Change Biology. February 16, 2016. Pictures from http://w3.marietta.edu/~. biol. /biomes/. desert.htm. Deserts. Environmental extremes. Arid and hot. Large daily temperature . Lori Kowaleski-Jones. Department of Family and Consumer Studies. University of Utah. Food Desert. Broadly conceptualized . as limited access to affordable and nutritious foods, particularly in low income areas. . . introduction. Deserts are all over the world but not in Europe.Not all deserts are sandy. The Antarctica desert is the biggest ice desert in the world.The Sahara desert is the biggest sandy desert in the world.. Department of Family and Consumer Studies. University of Utah. Food Desert. Broadly conceptualized . as limited access to affordable and nutritious foods, particularly in low income areas. Food . Environment . Deserts Adiabatic Warming and Cooling Warm, moist air masses forced up and over mountains experience decreasing atmospheric pressure and, as a result, expand. This process causes the expanding air mass to release a portion of its latent heat, resulting in a decrease in air temperature. This is called adiabatic cooling. Depending on the height to which the air is forced the air mass temperature may drop below the dew point, resulting in the formation of water droplets and precipitation in the form of rain or snow. As a result, when the air mass reaches the summit, it is cold and dry. Crossing the summit, the air mass descends and compresses. This produces a corresponding increase in atmospheric pressure and, as descent continues, the compressing air mass begin to warm. This is a called adiabatic warming. However, because the moisture was released during the cooling stage, the descending air mass is warm and dry. If sufficient moisture is removed the descending air mass could be dry enough to create a rain shadow effect where precipitation is much lower than surrounding areas. In some cases a rain shadow desert can form. 2018 ECOLOGY (B&C) KAREN LANCOUR National Bio Rules Committee Chairman karenlancour@charter.net C. Robyn Fischer National Event Supervisor Ecology Events Ecology – principles of ecology related to terrestrial environments – Deserts Adiabatic Warming and Cooling Warm, moist air masses forced up and over mountains experience decreasing atmospheric pressure and, as a result, expand. This process causes the expanding air mass to release a portion of its latent heat, resulting in a decrease in air temperature. This is called adiabatic cooling. Depending on the height to which the air is forced the air mass temperature may drop below the dew point, resulting in the formation of water droplets and precipitation in the form of rain or snow. As a result, when the air mass reaches the summit, it is cold and dry. Crossing the summit, the air mass descends and compresses. This produces a corresponding increase in atmospheric pressure and, as descent continues, the compressing air mass begin to warm. This is a called adiabatic warming. However, because the moisture was released during the cooling stage, the descending air mass is warm and dry. If sufficient moisture is removed the descending air mass could be dry enough to create a rain shadow effect where precipitation is much lower than surrounding areas. In some cases a rain shadow desert can form. Definition. : Low-income communities without ready access to healthy and affordable food. Effects 23.5 million Americans (including 6.5 million children). Occurs both in urban and rural areas. Consequences of Food Deserts.