Lecture3-1 - 1 Warming the Earth and the Atmosphere-I GEOL...

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Unformatted text preview: 1 Warming the Earth and the Atmosphere-I GEOL 1350: Introduction To Meteorology 2 Overview Some basic thermodynamic concepts Temperature Heat transfer in the atmosphere 3 Work is done on an object when a force moves it. How do we decided how much work is done? Energy - the capacity to do work Work = Force • Distance The amount of work done is the distance traveled times the force in the direction of displacement 4 Energy - the capacity to do work Work = Force • Distance 5 Forms of energy kinetic energy is the work that a body can do by virtue of its motion KE = ½ m v 2 Potential energy is the work an object can do as a result of relative position, or the potential to do work, or stored energy that can be converted to other forms of energy. PE = m × g × h m - mass, g - acceleration of gravity, h – object’s height above ground Internal Energy – total energy stored in an object (potential + kinetic) 6 Temperature is a measure of average kinetic energy of a substance; simply, is a measure of average speed of air molecules High temperatures corresponds to faster average molecule speeds Temperature scales - three commonly used scales: • Fahrenheit ( o F) • Celsius ( o C) • Kelvin (K) 7 Fahrenheit ( Fahrenheit ( o F) and ) and Celsius ( Celsius ( o C) scales C) scales are calibrated to are calibrated to freezing and boiling freezing and boiling water, but the Celsius water, but the Celsius range is range is 1.8 1.8 times times more compact more compact The Celsius and The Celsius and Kelvin scales are the Kelvin scales are the same except that K is same except that K is 273.16 degree higher 273.16 degree higher than than o C K= K= o C+273.16 C+273.16 8...
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This note was uploaded on 02/08/2010 for the course GEOL 1350 taught by Professor Rappenglück during the Spring '08 term at University of Houston.

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Lecture3-1 - 1 Warming the Earth and the Atmosphere-I GEOL...

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