气候变化领域集成服务门户(CCPortal): Convectively Generated Gravity Waves During Solstice and Equinox Conditions

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DOI	10.1029/2019JD031582
	Convectively Generated Gravity Waves During Solstice and Equinox Conditions
	Heale C.J.; Lund T.S.; Fritts D.C.
发表日期	2020
ISSN	2169897X
卷号	125 期号:9
英文摘要	Previous studies suggest that mesospheric concentric wave patterns are more observable in the equinox months than solstice months, despite concentric and semiconcentric waves being readily observed in summer months in the stratosphere. This study uses a 3-D nonlinear model to simulate the propagation and dissipation of convectively generated gravity waves under averaged equinox and solstice conditions to investigate the influences of wave breaking upon these concentric patterns. It is found that the relatively weak atmospheric winds and shears during the equinox months means that waves can propagate up to the lower thermosphere before breaking. In contrast, strong zonal winds and shears in the summer solstice months lead to in situ breaking in the mesosphere, which causes disruption to the concentric pattern. While the western propagating portion of the concentric pattern is filtered by the stratospheric winds, the eastern propagating portion rapidly transitions to turbulence in the mesosphere making it less likely to observe concentric patterns in the solstice months. The concentric pattern is more complete in the equinox months because the waves are only weakly filtered by winds and relatively little in situ breaking occurs in the mesosphere. However, in situ breaking does not affect the pattern in the stratosphere, where the morphology is primarily dictated by wind filtering. This also helps explain why concentric and semiconcentric patterns are observed in the summer stratosphere but not regularly in the mesosphere. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Concentric Waves; Convective Generation; Gravity Waves; Numerical Modeling
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186038
作者单位	Center for Space and Atmospheric Research (CSAR), Embry-Riddle Aeronautical University, Daytona Beach, FL, United States; GATS Inc, Boulder, CO, United States
推荐引用方式 GB/T 7714	Heale C.J.,Lund T.S.,Fritts D.C.. Convectively Generated Gravity Waves During Solstice and Equinox Conditions[J],2020,125(9).
APA	Heale C.J.,Lund T.S.,&Fritts D.C..(2020).Convectively Generated Gravity Waves During Solstice and Equinox Conditions.Journal of Geophysical Research: Atmospheres,125(9).
MLA	Heale C.J.,et al."Convectively Generated Gravity Waves During Solstice and Equinox Conditions".Journal of Geophysical Research: Atmospheres 125.9(2020).