气候变化领域集成服务门户(CCPortal): Comparative study between ground-based observations and NAVGEM-HA analysis data in the mesosphere and lower thermosphere region

CCPortal

DOI	10.5194/acp-20-11979-2020
	Comparative study between ground-based observations and NAVGEM-HA analysis data in the mesosphere and lower thermosphere region
	Stober G.; Baumgarten K.; McCormack J.P.; Brown P.; Czarnecki J.
发表日期	2020
ISSN	16807316
起始页码	11979
结束页码	12010
卷号	20 期号:20
英文摘要	Recent studies have shown that day-to-day variability of the migrating semidiurnal solar (SW2) tide within the mesosphere and lower thermosphere (MLT) is a key driver of anomalies in the thermosphere-ionosphere system. Here, we study the variability in both the amplitude and phase of SW2 using meteor radar wind and lidar temperature observations at altitudes of 75-110 km as well as wind and temperature output from the Navy Global Environmental Model-High Altitude (NAVGEM-HA), a high-altitude meteorological analysis system. Application of a new adaptive spectral filter technique to both local radar wind observations and global NAVGEM-HA analyses offers an important cross-validation of both data sets and makes it possible to distinguish between migrating and non-migrating tidal components, which is difficult using local measurements alone. Comparisons of NAVGEM-HA, meteor radar and lidar observations over a 12-month period show that the meteorological analyses consistently reproduce the seasonal as well as day-to-day variability in mean winds, mean temperatures and SW2 features from the ground-based observations. This study also examines in detail the day-to-day variability in SW2 during two sudden stratospheric warming, events that have been implicated in producing ionospheric anomalies. During this period, both meteor radar and NAVGEM-HA winds show a significant phase shift and amplitude modulation, but no signs of coupling to the lunar tide as previous studies have suggested. Overall, these findings demonstrate the benefit of combining global high-altitude meteorological analyses with ground-based observations of the MLT region to better understand the tidal variability in the atmosphere. © 2020 Author(s).
语种	英语
scopus关键词	air temperature; amplitude; comparative study; ground-based measurement; lidar; mesosphere; radar; thermosphere; wind
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/143887
作者单位	Institute of Applied Physics, Microwave Physics, University of Bern, Bern, Switzerland; Leibniz-Institute of Atmospheric Physics, University of Rostock, Kühlungsborn, Germany; Fraunhofer Institute for Computer Graphics Research Igd, Rostock, Germany; Space Science Division, Naval Research Laboratory, Washington, DC, United States; Dept. of Physics and Astronomy, University of Western Ontario, London, ON, Canada; Western Institute for Earth and Space Exploration, University of Western Ontario, London, ON, Canada
推荐引用方式 GB/T 7714	Stober G.,Baumgarten K.,McCormack J.P.,et al. Comparative study between ground-based observations and NAVGEM-HA analysis data in the mesosphere and lower thermosphere region[J],2020,20(20).
APA	Stober G.,Baumgarten K.,McCormack J.P.,Brown P.,&Czarnecki J..(2020).Comparative study between ground-based observations and NAVGEM-HA analysis data in the mesosphere and lower thermosphere region.Atmospheric Chemistry and Physics,20(20).
MLA	Stober G.,et al."Comparative study between ground-based observations and NAVGEM-HA analysis data in the mesosphere and lower thermosphere region".Atmospheric Chemistry and Physics 20.20(2020).