期刊
ADVANCES IN SPACE RESEARCH
卷 41, 期 9, 页码 1477-1486出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.asr.2007.10.020
关键词
OH chemistry; gravity wave; airglow; wave packet; secular variation
Secular variations of OH airglow (8,3) band and of the intensity-weighted temperature induced by a gravity wave packet at three latitudes in the northern hemisphere in the Mesosphere/Lower Thermosphere region are investigated using a 2-D, time-dependent, fully nonlinear OH chemistry-dynamics model. A net-cycled average survives due to wave transience and dissipation. The integrated OH (8,3) volume emission rates show a 20 percent increase induced by the wave packet. The corresponding intensity-weighted temperature shows an initial increase up to 2 percent then a gradual decrease for the remainder of the simulation time by the same wave packet. These secular variations could be mistaken as long-period or short-period waves in the airglow observations. Therefore, care must be taken when analyzing the data from observations. (C) 2007 COSPAR. Published by Elsevier Ltd. All rights reserved.
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