Variability of MLT winds and waves over mid-latitude during the 2000/2001 and 2009/2010 winter stratospheric sudden warming

	Variability of MLT winds and waves over mid-latitude during the 2000/2001 and 2009/2010 winter stratospheric sudden warming
	Chen, X.; Hu, X.; Xiao, C.
刊名	ANNALES GEOPHYSICAE
	2012
卷号	30 期号:6 页码:991-1001
关键词	Meteorology and atmospheric dynamics Middle atmosphere dynamics
ISSN号	0992-7689
通讯作者	Hu, X (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China.
中文摘要	The mesosphere and lower thermosphere (MLT) wind structure over Wuhan (30A degrees N, 114A degrees E) in 2000/2001 winter and over Langfang (39.4A degrees N, 116.6A degrees E) in 2009/2010 winter are examined to reveal the effects of stratospheric sudden warming (SSW) in mid-low-latitude MLT region. The result shows that the MLT daily zonal wind over these two sites reversed from eastward wind to westward wind for several days during the SSW events. The reversals were almost coincident with the polar stratospheric temperature reaching its maximum at 10 hPa, 90A degrees N and were about ten days prior to the reversal of high latitude stratospheric zonal wind at 10 hPa, 60A degrees N. The temporal variations of tides, gravity waves and 2-day planetary waves in the mid-latitude MLT showed different behavior during the two SSW events. During the 2001 SSW event, MLT diurnal tide reached its maximum when the MLT zonal wind decreased rapidly and SSW event began in polar stratosphere; the activity of 2-day waves decreased after the onset of the 2001 SSW, while the gravity wave increased when the 2001 SSW developed into a major warming. However, in the 2009/2010 winter, the semidiurnal tide and 2-day wave in MLT over Langfang reached a peak about two days earlier than zonal wind reversal at 10 hPa, 60A degrees N; no significant features were found in diurnal tides, terdiurnal tides and gravity waves related to the 2010 SSW event.
英文摘要	The mesosphere and lower thermosphere (MLT) wind structure over Wuhan (30A degrees N, 114A degrees E) in 2000/2001 winter and over Langfang (39.4A degrees N, 116.6A degrees E) in 2009/2010 winter are examined to reveal the effects of stratospheric sudden warming (SSW) in mid-low-latitude MLT region. The result shows that the MLT daily zonal wind over these two sites reversed from eastward wind to westward wind for several days during the SSW events. The reversals were almost coincident with the polar stratospheric temperature reaching its maximum at 10 hPa, 90A degrees N and were about ten days prior to the reversal of high latitude stratospheric zonal wind at 10 hPa, 60A degrees N. The temporal variations of tides, gravity waves and 2-day planetary waves in the mid-latitude MLT showed different behavior during the two SSW events. During the 2001 SSW event, MLT diurnal tide reached its maximum when the MLT zonal wind decreased rapidly and SSW event began in polar stratosphere; the activity of 2-day waves decreased after the onset of the 2001 SSW, while the gravity wave increased when the 2001 SSW developed into a major warming. However, in the 2009/2010 winter, the semidiurnal tide and 2-day wave in MLT over Langfang reached a peak about two days earlier than zonal wind reversal at 10 hPa, 60A degrees N; no significant features were found in diurnal tides, terdiurnal tides and gravity waves related to the 2010 SSW event.
学科主题	空间环境
收录类别	SCI ; EI
资助信息	National Natural Science Foundation of China [41104099, 41104100, 40774087]
语种	英语
公开日期	2014-12-15
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/2933]
专题	国家空间科学中心_空间环境部
推荐引用方式 GB/T 7714	Chen, X.,Hu, X.,Xiao, C.. Variability of MLT winds and waves over mid-latitude during the 2000/2001 and 2009/2010 winter stratospheric sudden warming[J]. ANNALES GEOPHYSICAE,2012,30(6):991-1001.
APA	Chen, X.,Hu, X.,&Xiao, C..(2012).Variability of MLT winds and waves over mid-latitude during the 2000/2001 and 2009/2010 winter stratospheric sudden warming.ANNALES GEOPHYSICAE,30(6),991-1001.
MLA	Chen, X.,et al."Variability of MLT winds and waves over mid-latitude during the 2000/2001 and 2009/2010 winter stratospheric sudden warming".ANNALES GEOPHYSICAE 30.6(2012):991-1001.