气候变化领域集成服务门户(CCPortal): Planetary waves in the mesosphere lower thermosphere during stratospheric sudden warming: observations using a network of meteor radars from high to equatorial latitudes

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DOI	10.1007/s00382-020-05214-5
	Planetary waves in the mesosphere lower thermosphere during stratospheric sudden warming: observations using a network of meteor radars from high to equatorial latitudes
	Koushik N.; Kumar K.K.; Ramkumar G.; Subrahmanyam K.V.; Kishore Kumar G.; Hocking W.K.; He M.; Latteck R.
发表日期	2020
ISSN	0930-7575
起始页码	4059
结束页码	4074
卷号	54
英文摘要	In the present communication, characteristics of mean winds and planetary waves in the mesosphere lower thermosphere (MLT) region during sudden stratospheric warming (SSW) events using observations from four meteor wind radars located at high, middle, low and equatorial latitudes are discussed. The response of the respective MLT regions to three SSW events that occurred during 2008–09, 2009–10 and 2011–12 winters are investigated. SSW signatures in the MLT zonal and meridional winds over the high latitude station Andenes (69.3∘N,16.0∘E) are found to have significant differences from event to event. Mean wind reversals in the high latitude MLT are found to be preceding the corresponding signatures at 60∘N, 10 hPa by a few days. Zonal and meridional wind reversals extend to the MLT region over the mid latitude location Socorro (34.1∘N,106.9∘W). However, MLT region over the low latitude station Thumba (8.5∘N,77∘E) as well as the equatorial station Kototabang (0.2∘S,100.3∘E) are found to be having a minimal response as far as mean winds are concerned. Apart from mean winds, planetary wave activity in the MLT region over the observational sites are examined, which show a systematic progression of planetary waves from high to equatorial latitudes during major as well as minor SSW events. To elucidate the origin of the observed planetary waves in the MLT region, the stratospheric winds are analyzed. Results suggest that the observed planetary waves have originated in the high-mid latitude middle atmospheric region. The present study provides observational evidence for secondary planetary wave generation in the high-mid latitude middle atmosphere and their equatorial propagation in the MLT as predicted by previous numerical modelling studies. Significance of the present study lies in employing a network of meteor radar observations to investigate the SSW signatures in the MLT region over high, middle, low and equatorial latitudes, simultaneously. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
语种	英语
scopus关键词	equatorial dynamics; latitude; mesosphere; planetary wave; radar; stratosphere; thermosphere; warming; Andenes; Andoya; Colima; India; Indonesia; Kerala; Kototabang; Mexico [North America]; Norway; Revillagigedo Islands; Socorro [Revillagigedo Islands]; Thumba; Vesteralen; West Sumatra
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145501
作者单位	Space Physics Laboratory, Vikram Sarabhai Space Centre, Thiruvananthapuram, 695022, India; Savitribhai Phule Pune University, Pune, India; University of Western Ontario, London, Canada; Leibniz Institute of Atmospheric Physics at the Rostock University, Kühlungsborn, Germany
推荐引用方式 GB/T 7714	Koushik N.,Kumar K.K.,Ramkumar G.,et al. Planetary waves in the mesosphere lower thermosphere during stratospheric sudden warming: observations using a network of meteor radars from high to equatorial latitudes[J],2020,54.
APA	Koushik N..,Kumar K.K..,Ramkumar G..,Subrahmanyam K.V..,Kishore Kumar G..,...&Latteck R..(2020).Planetary waves in the mesosphere lower thermosphere during stratospheric sudden warming: observations using a network of meteor radars from high to equatorial latitudes.Climate Dynamics,54.
MLA	Koushik N.,et al."Planetary waves in the mesosphere lower thermosphere during stratospheric sudden warming: observations using a network of meteor radars from high to equatorial latitudes".Climate Dynamics 54(2020).