Radiative forcing by contrails
A parametric study of the instantaneous radiative impact of contrails is presented using three different radiative transfer models for a series of model atmospheres and cloud parameters. Contrails are treated as geometrically and optically thin plane parallel homogeneous cirrus layers in a static at...
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1999
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ftdoajarticles:oai:doaj.org/article:66b420349cce4ec48d6ced45df08e9a9 2023-05-15T18:28:26+02:00 Radiative forcing by contrails R. Meerkötter U. Schumann D. R. Doelling P. Minnis T. Nakajima Y. Tsushima 1999-08-01T00:00:00Z https://doi.org/10.1007/s00585-999-1080-7 https://doaj.org/article/66b420349cce4ec48d6ced45df08e9a9 EN eng Copernicus Publications https://www.ann-geophys.net/17/1080/1999/angeo-17-1080-1999.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-999-1080-7 0992-7689 1432-0576 https://doaj.org/article/66b420349cce4ec48d6ced45df08e9a9 Annales Geophysicae, Vol 17, Pp 1080-1094 (1999) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 1999 ftdoajarticles https://doi.org/10.1007/s00585-999-1080-7 2022-12-31T09:40:54Z A parametric study of the instantaneous radiative impact of contrails is presented using three different radiative transfer models for a series of model atmospheres and cloud parameters. Contrails are treated as geometrically and optically thin plane parallel homogeneous cirrus layers in a static atmosphere. The ice water content is varied as a function of ambient temperature. The model atmospheres include tropical, mid-latitude, and subarctic summer and winter atmospheres. Optically thin contrails cause a positive net forcing at top of the atmosphere. At the surface the radiative forcing is negative during daytime. The forcing increases with the optical depth and the amount of contrail cover. At the top of the atmosphere, a mean contrail cover of 0.1% with average optical depth of 0.2 to 0.5 causes about 0.01 to 0.03 Wm -2 daily mean instantaneous radiative forcing. Contrails cool the surface during the day and heat the surface during the night, and hence reduce the daily temperature amplitude. The net effect depends strongly on the daily variation of contrail cloud cover. The indirect radiative forcing due to particle changes in natural cirrus clouds may be of the same magnitude as the direct one due to additional cover. Key words. Atmospheric composition and structure (aerosols and particles) · Meteorology and atmospheric dynamics (climatology · radiative processes) Article in Journal/Newspaper Subarctic Directory of Open Access Journals: DOAJ Articles Annales Geophysicae 17 8 1080 1094 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 R. Meerkötter U. Schumann D. R. Doelling P. Minnis T. Nakajima Y. Tsushima Radiative forcing by contrails |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
A parametric study of the instantaneous radiative impact of contrails is presented using three different radiative transfer models for a series of model atmospheres and cloud parameters. Contrails are treated as geometrically and optically thin plane parallel homogeneous cirrus layers in a static atmosphere. The ice water content is varied as a function of ambient temperature. The model atmospheres include tropical, mid-latitude, and subarctic summer and winter atmospheres. Optically thin contrails cause a positive net forcing at top of the atmosphere. At the surface the radiative forcing is negative during daytime. The forcing increases with the optical depth and the amount of contrail cover. At the top of the atmosphere, a mean contrail cover of 0.1% with average optical depth of 0.2 to 0.5 causes about 0.01 to 0.03 Wm -2 daily mean instantaneous radiative forcing. Contrails cool the surface during the day and heat the surface during the night, and hence reduce the daily temperature amplitude. The net effect depends strongly on the daily variation of contrail cloud cover. The indirect radiative forcing due to particle changes in natural cirrus clouds may be of the same magnitude as the direct one due to additional cover. Key words. Atmospheric composition and structure (aerosols and particles) · Meteorology and atmospheric dynamics (climatology · radiative processes) |
format |
Article in Journal/Newspaper |
author |
R. Meerkötter U. Schumann D. R. Doelling P. Minnis T. Nakajima Y. Tsushima |
author_facet |
R. Meerkötter U. Schumann D. R. Doelling P. Minnis T. Nakajima Y. Tsushima |
author_sort |
R. Meerkötter |
title |
Radiative forcing by contrails |
title_short |
Radiative forcing by contrails |
title_full |
Radiative forcing by contrails |
title_fullStr |
Radiative forcing by contrails |
title_full_unstemmed |
Radiative forcing by contrails |
title_sort |
radiative forcing by contrails |
publisher |
Copernicus Publications |
publishDate |
1999 |
url |
https://doi.org/10.1007/s00585-999-1080-7 https://doaj.org/article/66b420349cce4ec48d6ced45df08e9a9 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Annales Geophysicae, Vol 17, Pp 1080-1094 (1999) |
op_relation |
https://www.ann-geophys.net/17/1080/1999/angeo-17-1080-1999.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.1007/s00585-999-1080-7 0992-7689 1432-0576 https://doaj.org/article/66b420349cce4ec48d6ced45df08e9a9 |
op_doi |
https://doi.org/10.1007/s00585-999-1080-7 |
container_title |
Annales Geophysicae |
container_volume |
17 |
container_issue |
8 |
container_start_page |
1080 |
op_container_end_page |
1094 |
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1766210915398582272 |