DOI: 10.1175/JCLI-D-17-0202.1
Scopus记录号: 2-s2.0-85040548480
论文题名: On how the middle atmospheric residual circulation responds to the solar cycle close to the solstices
作者: Karlsson B. ; Kuilman M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 1 起始页码: 401
结束页码: 421
语种: 英语
英文关键词: Atmospheric circulation
; Middle atmosphere
; Solar cycle
Scopus关键词: Atmospheric chemistry
; Ionosphere
; Solar energy
; Solar radiation
; Atmospheric circulation
; Atmospheric residuals
; Middle atmosphere
; Middle atmosphere model
; Residual circulations
; Short-wave radiation
; Solar cycle
; Temperature response
; Upper atmosphere
; atmospheric circulation
; atmospheric modeling
; heating
; middle atmosphere
; shortwave radiation
; solar activity
; solar cycle
; summer
英文摘要: During high solar activity, the atmosphere receives more energy from the sun, particularly in the form of shortwave radiation. Most notable is the effect in the middle and upper atmosphere, which in general shows a positive temperature response due to physical and chemical processes that are intensified at high solar activity. It is thus surprising that a clear solar cycle signal is absent in the summer polar mesosphere region in spite of it being illuminated around the clock. In this study, it is investigated how the circulation in the summer mesosphere is affected by changes in the solar flux using a 30-yr run from the nudged version of the Canadian Middle Atmosphere Model (CMAM30). It is found that-in July-the solar cycle signal from direct solar heating is counteracted by an enhanced residual circulation, which adiabatically cools the region at a higher rate when the solar activity is above average. The dynamical cooling is partly initiated in the Southern Hemisphere winter stratosphere. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111743
Appears in Collections: 气候减缓与适应
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作者单位: Department of Meteorology, Stockholm University, Stockholm, Sweden
Recommended Citation:
Karlsson B.,Kuilman M.. On how the middle atmospheric residual circulation responds to the solar cycle close to the solstices[J]. Journal of Climate,2018-01-01,31(1)