By Guy P. Brasseur, Susan Solomon
The reader could be stunned to benefit that the observe "aeronomy" isn't present in the various average dictionaries of the English language (for examination ple. Webster's overseas dictionary). but the time period would seem to exist, as evidenced through the affiliations of the 2 authors of this quantity (Institut d'Aeronomie, Brussels, Belgium; Aeronomy Laboratory, nationwide Oceanic and Atmospheric management, Boulder, CO, USA). probably a part of this obscu rity arises simply because aeronomy is a comparatively new and evolving box of pastime, with a heritage courting again no farther than approximately 1940. The Chambers dic tionary of technological know-how and expertise presents the subsequent definition: "aeronomy (Meteor. ). The department of technology facing the ambience of the Earth and the opposite planets with regards to their chemical com place, actual homes, relative motion,
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Extra resources for Aeronomy of the Middle Atmosphere: Chemistry and Physics of the Stratosphere and Mesosphere
0/ the atmosphere, Edwards Moore, W. , Phyaical chemilJtry, Prentice Hall, (Englewood Cliffs, N. ), 1962. Rice, o. , and H. C. Ramsperger, J. Am. Chem. , 49, 1617, 1927. Shum, L. G. , and S. W. Benson, Review of the heat of formation of the hydroperoxyl radical, J. Phys. , 87, 3479, 1983. Slanger, T. G. and G. Black, 01S in the lower thermosphere - Chapman vs. Barth, Planet. , 25,79, 1977. Smith, I. W. , Kinetics and dynamiclJ of elementary gas reactionlJ, Butterworths, (London), 1980. Steinfeld, J.
2. Typical potential energy diagram for a diatomic molecule XY. Chemical Concepts in the Atmosphere 22 etc. 3 presents a schematic diagram of the possible vibrational modes for diatomic, linear triatomic, and bent triatomic molecules. The vibrational term symbol provides an ordered list of quantum numbers for each mode. For example, (010) means that the quantum number is zero for VI' one for V 2 and zero for Va. As we shall see in Chapter 4, the 15 pm V2 band of CO 2 plays a dominant role in cooling throughout the middle atmosphere.
Above the tropopause, the 8trato3phere begins, exhibiting increasing temperatures with altitude up to a maximum of about 270K at the level of the 3tratopatl3e located near 50 km. At still higher altitude, the temperature again decreases up to 85 km, where another temperature minimum is found. - - - - 2 6 0 - - - - - - --........ .... 270 - - - - - _ _ _ ". / ..... / . L.... , 30 o 30 60 LATITUDE SUMMER WINTER 60 - 200 90 N Fig. 2. ice. From London (1980). Aeronomy of the Middle Atmosphere me30pauu.