DOI: 10.1002/jgrd.50651
论文题名: Nighttime secondary ozone layer during major stratospheric sudden warmings in specified-dynamics WACCM
作者: Tweedy O.V. ; Limpasuvan V. ; Orsolini Y.J. ; Smith A.K. ; Garcia R.R. ; Kinnison D. ; Randall C.E. ; Kvissel O.-K. ; Stordal F. ; Harvey V.L. ; Chandran A.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 15 起始页码: 8346
结束页码: 8358
语种: 英语
英文关键词: chemical transport
; MLT dynamics
; secondary ozone maximum
; Sudden Stratospheric Warming
Scopus关键词: Dynamics
; NASA
; Ozone layer
; Temperature measurement
; Upper atmosphere
; Chemical transport
; Mesosphere-lower thermospheres
; National center for atmospheric researches
; Ozone maximums
; Sounding of the atmosphere using broadband emission radiometry
; Sudden stratospheric warming
; Thermosphere ionosphere mesosphere energetics and dynamics
; Whole atmosphere community climate models
; Ozone
; atmospheric dynamics
; climate modeling
; meteorology
; ozone
; photochemistry
; pollutant transport
; radiometric survey
; satellite data
; stratosphere
; thermosphere
英文摘要: A major stratospheric sudden warming (SSW) strongly impacts the entire middle atmosphere up to the thermosphere. Currently, the role of atmospheric dynamics on polar ozone in the mesosphere-lower thermosphere (MLT) during SSWs is not well understood. Here we investigate the SSW-induced changes in the nighttime "secondary" (90-105 km) ozone maximum by examining the dynamics and distribution of key species (like H and O) important to ozone. We use output from the National Center for Atmospheric Research Whole Atmosphere Community Climate Model with "Specified Dynamics" (SD-WACCM), in which the simulation is constrained by meteorological reanalyses below 1 hPa. Composites are made based on six major SSW events with elevated stratopause episodes. Individual SSW cases of temperature and MLT nighttime ozone from the model are compared against the Sounding of the Atmosphere using Broadband Emission Radiometry observations aboard the NASA's Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite. The evolution of ozone and major chemical trace species is associated with the anomalous vertical residual motion during SSWs and consistent with photochemical equilibrium governing the MLT nighttime ozone. Just after SSW onset, enhanced upwelling adiabatically cools the polar region from 80 to 100 km and transports low H from below. These conditions promote a concentration increase in the secondary ozone layer. Subsequent downwelling from the lower thermosphere warms the MLT and enhances the descent of H from the thermospheric reservoir, thereby limiting the secondary ozone concentration increase. Negative correlation of secondary ozone with respect to temperature and H is more pronounced during winters with SSWs than during non-SSW winters. Key Points MLT ozone changes during SSW are associated with anomalous residual motion. MLT ozone changes during SSW are consistent with photochemical equilibrium. Specified Dynamics WACCM captures realistic SSW. ©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/63432
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: School of Coastal and Marine System Science, Coastal Carolina University, Conway SC, United States; Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore MD 21209, Conway, SC 29528, United States; Norwegian Institute for Atmospheric Research, Kjeller, Norway; Birkeland Centre for Space Science, University of Bergen, Bergen, Norway; National Center for Atmospheric Research, Boulder CO, United States; Department of Atmospheric and Oceanic Sciences, University of Colorado Boulder, Boulder CO, United States; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder CO, United States; Department of Meteorology, University of Oslo, Oslo, Norway; Geophysical Institute, University of Alaska Fairbanks, Fairbanks AK, United States
Recommended Citation:
Tweedy O.V.,Limpasuvan V.,Orsolini Y.J.,et al. Nighttime secondary ozone layer during major stratospheric sudden warmings in specified-dynamics WACCM[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(15)