DOI: 10.1002/jgrd.50219
论文题名: The structure of the mesosphere during sudden stratospheric warmings in a global circulation model
作者: Zülicke C. ; Becker E.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 5 起始页码: 2255
结束页码: 2271
语种: 英语
英文关键词: global circulation model
; gravity waves
; mesospheric coolings
; planetary waves
; sudden stratospheric warmings
Scopus关键词: Benchmarking
; Cooling
; Gravity waves
; Circulation models
; Correlation analysis
; Global circulation model
; mesospheric coolings
; Planetary Waves
; Stratospheric warmings
; Temperature signal
; Temporal characteristics
; Computer simulation
; atmospheric modeling
; circulation modeling
; cooling
; gravity wave
; mesosphere
; parameterization
; planetary wave
; stratosphere
; turbulence
; warming
; Germany
; Kuhlungsborn
; Mecklenburg-West Pomerania
英文摘要: Mesospheric coolings and wind reversals during sudden stratospheric warmings are studied in a 570 day permanent January simulation with the Kühlungsborn Mechanistic Circulation Model (KMCM). The model is run at a high resolution in combination with an advanced parameterization of turbulence, allowing for an explicit description of gravity-wave effects. Self-generated major sudden stratospheric warmings are quantified with benchmark tests of Charlton and Polvani (2007) and are found to be nearly realistic. Extension of the tests into the mesosphere gives rise to a benchmark diagram for the entire middle atmosphere, showing that the mesospheric cooling is robust while the mesospheric wind response is variable. The same features appear in a composite constructed from five stratospheric warming events. The zonal-mean structures indicate an old stratopause descending with about 6 km per day during about 5 days before the central date. About 10 days after the central date, an elevated new stratopause develops in the upper mesosphere and subsequently progresses downward, which is driven by westward gravity waves. Temporal characteristics are deduced from 7 day smoothed daily time series from representative stratospheric and mesospheric zonal-mean quantities. A correlation analysis shows that the temperature signals are anticorrelated, while the wind signals are uncorrelated. The begin, peak, and end times of the events are diagnosed with two objective methods. Both methods reveal nearly equal-time appearance of stratospheric warming and wind deceleration (within 2 days), followed by mesospheric cooling with a delay of less than 5 days. This rules out mesospheric precursors of sudden stratospheric warmings in our simulation. © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63874
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Leibniz Institute of Atmospheric Physics, University of Rostock, Schlossstraße 12, 18225 Kühlungsborn, Germany
Recommended Citation:
Zülicke C.,Becker E.. The structure of the mesosphere during sudden stratospheric warmings in a global circulation model[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(5)