Affiliation:
1. Department of Chemistry and Physics, Southeastern Louisiana University , Hammond, Louisiana 70402
Abstract
We present an experiment investigating the physics of the atmospheric greenhouse effect that can be performed by undergraduate physics students. The students construct a three-channel spectral photometer to observe the infrared heat flux in the atmosphere. With this spectral photometer, the students observe the difference in heat flux between the portion of the IR spectrum that is absorbed by water vapor and carbon dioxide and the portion that is not absorbed by atmospheric constituents. The students discover that Earth's surface is warmed by radiation from the greenhouse gas absorption bands, and the radiation of heat to space is retarded by the absorption bands. One component of the experiment is performed on the ground and the other component is performed in the atmosphere using a high-altitude balloon. The students then compare their results to a simulation of infrared radiation transport in the atmosphere.
Funder
National Aeronautics and Space Administration
Publisher
American Association of Physics Teachers (AAPT)
Subject
General Physics and Astronomy
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4. Those seeking to learn more about student ballooning are advised to inquire with their local Space Grant consortium <https://www.nasa.gov/stem/spacegrant/home/Space_Grant_Consortium_Websites.html> or the Stratospheric Ballooning Association <https://www.stratoballooning.org/>, which hosts the Academic High Altitude Conference.