DOI: 10.1175/JCLI-D-17-0047.1
Scopus记录号: 2-s2.0-85040937295
论文题名: Coupling of stratospheric warmings with mesospheric coolings in observations and simulations
作者: Zülicke C. ; Becker E. ; Matthias V. ; Peters D.H.W. ; Schmidt H. ; Liu H.-L. ; Ramos L.T. ; Mitchell D.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 3 起始页码: 1107
结束页码: 1133
语种: 英语
英文关键词: General circulation models
; Gravity waves
; Middle atmosphere
; Planetary waves
; Satellite observations
Scopus关键词: Couplings
; Gravity waves
; Ionosphere
; General circulation model
; Middle atmosphere
; Planetary Waves
; Realistic simulation
; Satellite observations
; Stratospheric warmings
; Sudden stratospheric warming
; Whole atmosphere community climate models
; Climate models
; air temperature
; atmospheric general circulation model
; computer simulation
; cooling
; coupling
; gravity wave
; mesosphere
; observational method
; satellite imagery
; stratosphere
; warming
英文摘要: The vertical coupling between the stratosphere and the mesosphere is diagnosed from polar cap temperatures averaged over 60°-90°N with a new method: the joint occurrence of a warm stratosphere at 10 hPa and a cold mesosphere at 0.01 hPa. The investigation of an 11-yr-long dataset (2004-15) from Aura-MLS observations shows that such mesospheric coupling days appear in 7% of the winter. During major sudden stratospheric warming events mesospheric couplings are present with an enhanced average daily frequency of 22%. This daily frequency changes from event to event but broadly results in five of seven major warmings being classified as mesospheric couplings (2006, 2008, 2009, 2010, and 2013). The observed fraction of mesospheric coupling events (71%) is compared with simulations of the Kühlungsborn Mechanistic Circulation Model (KMCM), the Hamburg Model of the Neutral and Ionized Atmosphere (HAMMONIA), and the Whole Atmosphere Community Climate Model (WACCM). The simulated fraction of mesospheric coupling events ranges between 57% and 94%, which fits the observations. In searching for causal relations weak evidence is found that major warming events with strong intensity or split vortices favor their coupling with the upper mesosphere. More evidence is found with a conceptual model: an effective vertical coupling between 10 and 0.01 hPa is provided by deep zonal-mean easterlies at 60°N, which are acting as a gravity-wave guide. The explained variance is above 40% in the four datasets, which indicates a near-realistic simulation of this process. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111697
Appears in Collections: 气候减缓与适应
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作者单位: Leibniz Institute of Atmospheric Physics, Kühlungsborn, Germany; Max Planck Institute of Meteorology, Hamburg, Germany; High Altitude Observatory, National Center of Atmospheric Research, Boulder, CO, United States; Environmental Physics Laboratory, University of Vigo, Ourense, Spain; Department of Physics, University of Oxford, Oxford, United Kingdom; School of Geographical Science, University of Bristol, Bristol, United Kingdom
Recommended Citation:
Zülicke C.,Becker E.,Matthias V.,et al. Coupling of stratospheric warmings with mesospheric coolings in observations and simulations[J]. Journal of Climate,2018-01-01,31(3)