DOI: 10.1002/2013JD020576
论文题名: Temperature trends in the midlatitude summer mesosphere
作者: Lübken F.-J. ; Berger U. ; Baumgarten G.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 24 起始页码: 13347
结束页码: 13360
语种: 英语
英文关键词: climate change
; mesosphere
; temperature trends
Scopus关键词: Climate change
; Geometry
; Weather forecasting
; European centre for medium-range weather forecasts
; Linear temperature
; mesosphere
; Mesosphere/lower thermospheres
; Mesospheric temperature
; Pressure altitudes
; Temperature trends
; Temporal variation
; Carbon dioxide
; altitude
; carbon dioxide
; climate change
; geometry
; mesosphere
; nineteenth century
; observational method
; ozone
; pressure effect
; temperature effect
; thermosphere
; twentieth century
; weather forecasting
; Europe
英文摘要: We have performed trend studies in the mesosphere in the period 1961-2009 with Leibniz-Institute Middle Atmosphere (LIMA) model driven by European Centre for Medium-Range Weather Forecasts reanalysis below approximately 40 km and adapts temporal variations of CO2 and O3 according to observations. Temperatures in the mesosphere/lower thermosphere vary nonuniformly with time, mainly due to the influence of O3 . Here we analyze the contribution of varying concentrations of CO2 and O 3 to the temperature trend in the mesosphere. It is important to distinguish between trends on pressure altitudes, zp , and geometrical altitudes, zgeo , where the latter includes the effect of shrinking due to cooling at lower heights. For the period 1961-2009, temperature trends on geometrical and pressure altitudes can differ by as much as -0.9 K/dec in the mesosphere. Temperature trends reach approximately -1.3±0.11 K/dec at zp ∼60 km and -1.8±0.18 K/dec at zgeo ∼70 km, respectively. CO2 is the main driver of these trends in the mesosphere, whereas O3 contributes approximately one third, both on geometrical and pressure heights. Depending on the time period chosen, linear temperature trends can vary substantially. Altitudes of pressure levels in the mesosphere decrease by up to several hundred meters. We have performed long-term runs with LIMA applying twentieth century reanalysis dating back to 1871. Again, trends are nonuniform with time. Since the late nineteenth century, temperatures in the mesosphere have dropped by approximately 5-7 K on pressure altitudes and up to 10-12 K on geometrical altitudes. Key Points Mesospheric temperature trends are much larger compared to tropo/stratosphere Carbon dioxide and ozone are the main drivers for trends in the mesosphere Trends are not uniform in time and depend on geometric/pressure altitudes ©2013. American Geophysical Union. All Rights Reserved. 资助项目: LU 1174/3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63079
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: Leibniz-Institute of Atmospheric Physics, Rostock University, Schloss-Str. 6, DE-18225 Kühlungsborn, Germany
Recommended Citation:
Lübken F.-J.,Berger U.,Baumgarten G.. Temperature trends in the midlatitude summer mesosphere[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(24)