CU-Boulder ATOC 1070 - Lab6 (2 pages)

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Lab6



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Lab6

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School:
University of Colorado at Boulder
Course:
Atoc 1070 - Weather and the Atmosphere Laboratory
Weather and the Atmosphere Laboratory Documents

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ATOC 1070 Lab 6 infrared radiation and the greenhouse effect Sarah Rose Group Ian O Robert S Ana R Question 1 When we added plastic sheets the amount of IR radiation escaping into the room from the hot pot decreased The hot pot experiment is suppose to be a simulation of the Earth s surface and the plastic sheets are suppose to emulate the effect of the atmosphere The IR thermometer in this case is measuring the amount of IR escaping the Earth s atmosphere into space The more sheets we added the harder it was for the radiation to escape back into space The thicker the atmosphere the more IR it traps In the sky experiment the addition of the plastic sheets increased the amount of IR radiation entering the IR thermometer In the outdoor experiment the IR thermometer reading simulates the amount of radiation retuned to the ground by the atmosphere So by adding more sheets we have increased reflectivity to the Earth s surface Question 2 The introduction of more water vapor CO2 and other greenhouse gases into the atmosphere correspond to the increase in the number of plastic sheets An increase of Greenhouse gases in the atmosphere lead to warmer surface temperatures because more IR radiation is being trapped between the atmosphere and the Earth s surface The thicker the atmosphere the larger its capacity to trap in heat and keep it from being radiated back into space Question 3 The IR temperature for the single sheet of plastic with a hot water background was 62 6 deg C The IR temperature measured with the plastic bowl was 27 4 deg C and the dial temperature was 25 deg C The IR temperature is lower when the puddle of water is added because there is a thicker layer of water for the IR to travel through and some of it gets stopped absorbed by the water The IR temperature for the puddle of water over the hot pot is similar to the dial temperature because the puddle of water above the hot pot is absorbing all the IR from the heated water below so thy have similar readings



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