DOI: 10.1002/jgrd.50184
论文题名: Aviation-induced cirrus and radiation changes at diurnal timescales
作者: Schumann U. ; Graf K.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 5 起始页码: 2404
结束页码: 2421
语种: 英语
英文关键词: aviation
; cirrus
; climate
; contrail
; radiation
Scopus关键词: Atmospheric radiation
; Clouds
; Heat radiation
; cirrus
; climate
; contrail
; Linear response
; North Atlantic
; Radiation change
; Radiative forcings
; South Atlantic
; Aviation
; air transportation
; atmospheric modeling
; cirrus
; cloud radiative forcing
; contrail
; diurnal variation
; marine atmosphere
; timescale
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: The radiative forcing from aviation-induced cirrus is derived from observations and models. The annual mean diurnal cycle of airtraffic in the North Atlantic region exhibits two peaks in early morning and afternoon with different peak times in the western and eastern parts of the North Atlantic region. The same "aviation fingerprint" is found in 8 years (2004-2011) of Meteosat observations of cirrus cover and OLR. The observations are related to airtraffic data with linear response models assuming the background atmosphere without aviation to be similar to that observed in the South Atlantic. The change in OLR is interpreted as aviation-induced longwave radiative forcing (LW RF). The data analysis suggests an LW RF of about 600-900 mW m-2 regionally. A detailed contrail cirrus model for given global meteorology and airtraffic in 2006 gives similar results. The global RF is estimated from the ratio of global and regional RF as derived from three models. The extrapolation implies about 100-160 mW m-2 global LW RF. The models show large differences in the shortwave/longwave RF-magnitude ratio. One model computes a ratio of 0.6, implying an estimate of global net RF of about 50 mW m-2 (40-80 mW m-2). Other models suggest smaller ratios, with less cooling during day, which would imply considerably larger net effects. The sensitivity of the results to the accuracy of the observations, traffic data, and models and the estimated background is discussed. © 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/63889
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: Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
Recommended Citation:
Schumann U.,Graf K.. Aviation-induced cirrus and radiation changes at diurnal timescales[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(5)