Some considerations on the infrared cloud forcing
Long-wave spectral cloud forcing is computed for realistic clouds of various optical thickness embedded in the tropical and subarctic winter standard atmospheres. The strict connections between the integrated long-wave cloud forcing (LCF) and cloud's altitude and transmissivity are shown. LCF,...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | https://hdl.handle.net/11585/956459 https://doi.org/10.1029/2003jd003428 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2003JD003428 |
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ftunibolognairis:oai:cris.unibo.it:11585/956459 2024-04-14T08:20:12+00:00 Some considerations on the infrared cloud forcing Rizzi R. Maestri T. Rizzi R. Maestri T. 2003 STAMPA https://hdl.handle.net/11585/956459 https://doi.org/10.1029/2003jd003428 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2003JD003428 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000184603300005 volume:108 issue:14 firstpage:4403 lastpage:4408 numberofpages:6 journal:JOURNAL OF GEOPHYSICAL RESEARCH https://hdl.handle.net/11585/956459 doi:10.1029/2003jd003428 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0742270495 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2003JD003428 Cloud forcing Infrared Radiation Radiometry info:eu-repo/semantics/article 2003 ftunibolognairis https://doi.org/10.1029/2003jd003428 2024-03-21T16:58:09Z Long-wave spectral cloud forcing is computed for realistic clouds of various optical thickness embedded in the tropical and subarctic winter standard atmospheres. The strict connections between the integrated long-wave cloud forcing (LCF) and cloud's altitude and transmissivity are shown. LCF, especially in presence of ice clouds, grows almost linearly with cloud transmissivity, and largest values are found in presence of high and opaque cirri. We have also considered the effect of incomplete spectral coverage in broadband long-wave radiometry when estimating LCF. The error has been computed as a function of edge cutoff (two different filters are used) and cloud's transmissivity and top altitude. Uncorrected measurements from sensors with incomplete spectral coverage generally underestimate the real LCF, especially for the highest cirrus clouds in the tropics. A correction is possible since the percentage error is practically constant with cloud's transmissivity. Article in Journal/Newspaper Subarctic IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Journal of Geophysical Research: Atmospheres 108 D14 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
Cloud forcing Infrared Radiation Radiometry |
spellingShingle |
Cloud forcing Infrared Radiation Radiometry Rizzi R. Maestri T. Some considerations on the infrared cloud forcing |
topic_facet |
Cloud forcing Infrared Radiation Radiometry |
description |
Long-wave spectral cloud forcing is computed for realistic clouds of various optical thickness embedded in the tropical and subarctic winter standard atmospheres. The strict connections between the integrated long-wave cloud forcing (LCF) and cloud's altitude and transmissivity are shown. LCF, especially in presence of ice clouds, grows almost linearly with cloud transmissivity, and largest values are found in presence of high and opaque cirri. We have also considered the effect of incomplete spectral coverage in broadband long-wave radiometry when estimating LCF. The error has been computed as a function of edge cutoff (two different filters are used) and cloud's transmissivity and top altitude. Uncorrected measurements from sensors with incomplete spectral coverage generally underestimate the real LCF, especially for the highest cirrus clouds in the tropics. A correction is possible since the percentage error is practically constant with cloud's transmissivity. |
author2 |
Rizzi R. Maestri T. |
format |
Article in Journal/Newspaper |
author |
Rizzi R. Maestri T. |
author_facet |
Rizzi R. Maestri T. |
author_sort |
Rizzi R. |
title |
Some considerations on the infrared cloud forcing |
title_short |
Some considerations on the infrared cloud forcing |
title_full |
Some considerations on the infrared cloud forcing |
title_fullStr |
Some considerations on the infrared cloud forcing |
title_full_unstemmed |
Some considerations on the infrared cloud forcing |
title_sort |
some considerations on the infrared cloud forcing |
publishDate |
2003 |
url |
https://hdl.handle.net/11585/956459 https://doi.org/10.1029/2003jd003428 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2003JD003428 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000184603300005 volume:108 issue:14 firstpage:4403 lastpage:4408 numberofpages:6 journal:JOURNAL OF GEOPHYSICAL RESEARCH https://hdl.handle.net/11585/956459 doi:10.1029/2003jd003428 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0742270495 https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2003JD003428 |
op_doi |
https://doi.org/10.1029/2003jd003428 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
108 |
container_issue |
D14 |
_version_ |
1796298427155349504 |