DOI: 10.1002/jgrd.50424
论文题名: The importance of time-varying forcing for QBO modulation of the atmospheric 11 year solar cycle signal
作者: Matthes K. ; Kodera K. ; Garcia R.R. ; Kuroda Y. ; Marsh D.R. ; Labitzke K.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 10 起始页码: 4435
结束页码: 4447
语种: 英语
英文关键词: solar influence
; solar-QBO relationship
; stratospheric modeling
Scopus关键词: Climatology
; Modulation
; Solar energy
; Upper atmosphere
; 11-year solar cycle
; Lower stratosphere
; National center for atmospheric researches
; Quasi-biennial oscillation
; Solar influence
; solar-QBO relationship
; Stratospheric warmings
; Whole atmosphere community climate models
; Experiments
; climate modeling
; climatology
; quasi-biennial oscillation
; solar cycle
; stratosphere
; wind
英文摘要: We present results from three multidecadal sensitivity experiments with time-varying solar cycle and quasi-biennial oscillation (QBO) forcings using National Center for Atmospheric Research's Whole Atmosphere Community Climate Model (WACCM3.1). The model experiments are unique compared to earlier studies as they use time-varying forcings for the solar cycle only and the QBO, both individually and combined. The results show that the annual mean solar response in the tropical upper stratosphere is independent of the presence of the QBO. The response in the middle to lower stratosphere differs depending on the presence of the QBO and the solar cycle but is statistically indistinguishable in the three experiments. The seasonal evolution of the solar and the combined solar-QBO signals reveals a reasonable agreement with observations only for the experiment in which both the solar cycle and the QBO forcing are present, suggesting that both forcings are important to generate the observed response. More stratospheric warmings occur during solar maximum and QBO west conditions. This appears to be the result of a QBO modulation of the background zonal mean wind climatology, which modifies the solar signal. Depending on the background wind, the small initial early winter solar signal in the subtropical upper stratosphere/lower mesosphere is enhanced during QBO east and diminished during QBO west conditions. This consequently influences the transfer of the solar-QBO signal during winter and results in the observed differences during late winter. Key PointsSolar response differs significantly during QBO phasesModeled solar response in agreement with observationsMechanism for solar-QBO interaction proposed ©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/63747
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: GEOMAR Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105 Kiel, Germany; Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan; National Center for Atmospheric Research, Boulder CO, United States; Meteorological Research Institute, Tsukuba, Japan; Institut für Meteorologie, Freie Universität Berlin, Berlin, Germany
Recommended Citation:
Matthes K.,Kodera K.,Garcia R.R.,et al. The importance of time-varying forcing for QBO modulation of the atmospheric 11 year solar cycle signal[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(10)