Radiative forcing by contrails
International audience 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 cirru...
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ftinsu:oai:HAL:hal-00316645v1 2023-11-12T04:26:58+01:00 Radiative forcing by contrails Meerkötter, R. Schumann, U. Doelling, D. R. Minnis, P. Nakajima, T. Tsushima, Y. DLR Institut für Physik der Atmosphäre (IPA) Deutsches Zentrum für Luft- und Raumfahrt Oberpfaffenhofen-Wessling (DLR) NASA Headquarters Center for Climate System Research Kashiwa (CCSR) The University of Tokyo (UTokyo) 1999 https://hal.science/hal-00316645 https://hal.science/hal-00316645/document https://hal.science/hal-00316645/file/angeo-17-1080-1999.pdf en eng HAL CCSD European Geosciences Union hal-00316645 https://hal.science/hal-00316645 https://hal.science/hal-00316645/document https://hal.science/hal-00316645/file/angeo-17-1080-1999.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316645 Annales Geophysicae, 1999, 17 (8), pp.1080-1094 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 1999 ftinsu 2023-10-25T16:25:32Z International audience 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. Article in Journal/Newspaper Subarctic Institut national des sciences de l'Univers: HAL-INSU |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Meerkötter, R. Schumann, U. Doelling, D. R. Minnis, P. Nakajima, T. Tsushima, Y. Radiative forcing by contrails |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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. |
author2 |
DLR Institut für Physik der Atmosphäre (IPA) Deutsches Zentrum für Luft- und Raumfahrt Oberpfaffenhofen-Wessling (DLR) NASA Headquarters Center for Climate System Research Kashiwa (CCSR) The University of Tokyo (UTokyo) |
format |
Article in Journal/Newspaper |
author |
Meerkötter, R. Schumann, U. Doelling, D. R. Minnis, P. Nakajima, T. Tsushima, Y. |
author_facet |
Meerkötter, R. Schumann, U. Doelling, D. R. Minnis, P. Nakajima, T. Tsushima, Y. |
author_sort |
Meerkötter, R. |
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 |
HAL CCSD |
publishDate |
1999 |
url |
https://hal.science/hal-00316645 https://hal.science/hal-00316645/document https://hal.science/hal-00316645/file/angeo-17-1080-1999.pdf |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00316645 Annales Geophysicae, 1999, 17 (8), pp.1080-1094 |
op_relation |
hal-00316645 https://hal.science/hal-00316645 https://hal.science/hal-00316645/document https://hal.science/hal-00316645/file/angeo-17-1080-1999.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782340752475422720 |