On the accuracy of RTTOV-SCATT for radiative transfer at all-sky microwave and submillimeter frequencies
- Autores
- Barlakas, Vasileios; Galligani, Victoria Sol; Geer, Alan J.; Eriksson, Patrick
- Año de publicación
- 2022
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- With the new generation of microwave instruments and, especially, the Ice Cloud Imager covering submillimeter frequencies, it is necessary to evaluate the performance of the operational Radiative Transfer model for TOVS (RTTOV). Thus, an intercomparison study has been conducted between RTTOV and the reference model ARTS (Atmospheric Radiative Transfer Simulator), with an emphasis on cloudy and precipitating conditions, covering frequencies between ≈53.6 and ≈664.0 GHz. Overall a rather good agreement is found between the δ-Eddington solution embedded in the scattering solver of RTTOV, RTTOV-SCATT, and the discrete ordinate solution embedded in ARTS. Under clear-sky conditions, given a consistent spectroscopy, the agreement is within 0.4 K over all frequencies considered. When idealized, homogeneous cloudy conditions are employed, the agreement is mostly ±2 K; this range is exceeded only at high scattering conditions. However, the following weaknesses are identified: the δ-Eddington solution fails to produce deep enough brightness temperature depressions at increasingly high scattering conditions and is not sufficient to capture the phase function structures at size parameters above 2–3; conditions typically found at around 664.0 GHz. When realistic hydrometeor profiles are employed, δ-Eddington leads to a root mean squared error of 1 K, with individual errors between 0 and 4 K. Infrequently, and in localized areas, larger discrepancies are identified, exceeding 10 K. However, these inaccuracies stemming from the simplified physics of RTTOV-SCATT were found at least an order of magnitude smaller than the cloud and precipitation representation errors assigned in data assimilation. Thus, we support the use of RTTOV-SCATT at submillimeter frequencies for operational purposes.
Fil: Barlakas, Vasileios. Chalmers University of Technology; Suecia
Fil: Galligani, Victoria Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina
Fil: Geer, Alan J.. European Centre For Medium-range Weather Forecasts; Reino Unido
Fil: Eriksson, Patrick. Chalmers University of Technology; Suecia - Materia
-
BENCHMARK RESULTS
ICE CLOUD IMAGER
INTERCOMPARISON
MICROWAVE/SUBMILLIMETER
RADIATIVE TRANSFER - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/212490
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repository_id_str |
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network_name_str |
CONICET Digital (CONICET) |
spelling |
On the accuracy of RTTOV-SCATT for radiative transfer at all-sky microwave and submillimeter frequenciesBarlakas, VasileiosGalligani, Victoria SolGeer, Alan J.Eriksson, PatrickBENCHMARK RESULTSICE CLOUD IMAGERINTERCOMPARISONMICROWAVE/SUBMILLIMETERRADIATIVE TRANSFERhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1With the new generation of microwave instruments and, especially, the Ice Cloud Imager covering submillimeter frequencies, it is necessary to evaluate the performance of the operational Radiative Transfer model for TOVS (RTTOV). Thus, an intercomparison study has been conducted between RTTOV and the reference model ARTS (Atmospheric Radiative Transfer Simulator), with an emphasis on cloudy and precipitating conditions, covering frequencies between ≈53.6 and ≈664.0 GHz. Overall a rather good agreement is found between the δ-Eddington solution embedded in the scattering solver of RTTOV, RTTOV-SCATT, and the discrete ordinate solution embedded in ARTS. Under clear-sky conditions, given a consistent spectroscopy, the agreement is within 0.4 K over all frequencies considered. When idealized, homogeneous cloudy conditions are employed, the agreement is mostly ±2 K; this range is exceeded only at high scattering conditions. However, the following weaknesses are identified: the δ-Eddington solution fails to produce deep enough brightness temperature depressions at increasingly high scattering conditions and is not sufficient to capture the phase function structures at size parameters above 2–3; conditions typically found at around 664.0 GHz. When realistic hydrometeor profiles are employed, δ-Eddington leads to a root mean squared error of 1 K, with individual errors between 0 and 4 K. Infrequently, and in localized areas, larger discrepancies are identified, exceeding 10 K. However, these inaccuracies stemming from the simplified physics of RTTOV-SCATT were found at least an order of magnitude smaller than the cloud and precipitation representation errors assigned in data assimilation. Thus, we support the use of RTTOV-SCATT at submillimeter frequencies for operational purposes.Fil: Barlakas, Vasileios. Chalmers University of Technology; SueciaFil: Galligani, Victoria Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; ArgentinaFil: Geer, Alan J.. European Centre For Medium-range Weather Forecasts; Reino UnidoFil: Eriksson, Patrick. Chalmers University of Technology; SueciaPergamon-Elsevier Science Ltd2022-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/212490Barlakas, Vasileios; Galligani, Victoria Sol; Geer, Alan J.; Eriksson, Patrick; On the accuracy of RTTOV-SCATT for radiative transfer at all-sky microwave and submillimeter frequencies; Pergamon-Elsevier Science Ltd; Journal of Quantitative Spectroscopy and Radiative Transfer; 283; 6-2022; 1-180022-4073CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0022407322000747info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jqsrt.2022.108137info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:18:59Zoai:ri.conicet.gov.ar:11336/212490instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:18:59.453CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
On the accuracy of RTTOV-SCATT for radiative transfer at all-sky microwave and submillimeter frequencies |
title |
On the accuracy of RTTOV-SCATT for radiative transfer at all-sky microwave and submillimeter frequencies |
spellingShingle |
On the accuracy of RTTOV-SCATT for radiative transfer at all-sky microwave and submillimeter frequencies Barlakas, Vasileios BENCHMARK RESULTS ICE CLOUD IMAGER INTERCOMPARISON MICROWAVE/SUBMILLIMETER RADIATIVE TRANSFER |
title_short |
On the accuracy of RTTOV-SCATT for radiative transfer at all-sky microwave and submillimeter frequencies |
title_full |
On the accuracy of RTTOV-SCATT for radiative transfer at all-sky microwave and submillimeter frequencies |
title_fullStr |
On the accuracy of RTTOV-SCATT for radiative transfer at all-sky microwave and submillimeter frequencies |
title_full_unstemmed |
On the accuracy of RTTOV-SCATT for radiative transfer at all-sky microwave and submillimeter frequencies |
title_sort |
On the accuracy of RTTOV-SCATT for radiative transfer at all-sky microwave and submillimeter frequencies |
dc.creator.none.fl_str_mv |
Barlakas, Vasileios Galligani, Victoria Sol Geer, Alan J. Eriksson, Patrick |
author |
Barlakas, Vasileios |
author_facet |
Barlakas, Vasileios Galligani, Victoria Sol Geer, Alan J. Eriksson, Patrick |
author_role |
author |
author2 |
Galligani, Victoria Sol Geer, Alan J. Eriksson, Patrick |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
BENCHMARK RESULTS ICE CLOUD IMAGER INTERCOMPARISON MICROWAVE/SUBMILLIMETER RADIATIVE TRANSFER |
topic |
BENCHMARK RESULTS ICE CLOUD IMAGER INTERCOMPARISON MICROWAVE/SUBMILLIMETER RADIATIVE TRANSFER |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
With the new generation of microwave instruments and, especially, the Ice Cloud Imager covering submillimeter frequencies, it is necessary to evaluate the performance of the operational Radiative Transfer model for TOVS (RTTOV). Thus, an intercomparison study has been conducted between RTTOV and the reference model ARTS (Atmospheric Radiative Transfer Simulator), with an emphasis on cloudy and precipitating conditions, covering frequencies between ≈53.6 and ≈664.0 GHz. Overall a rather good agreement is found between the δ-Eddington solution embedded in the scattering solver of RTTOV, RTTOV-SCATT, and the discrete ordinate solution embedded in ARTS. Under clear-sky conditions, given a consistent spectroscopy, the agreement is within 0.4 K over all frequencies considered. When idealized, homogeneous cloudy conditions are employed, the agreement is mostly ±2 K; this range is exceeded only at high scattering conditions. However, the following weaknesses are identified: the δ-Eddington solution fails to produce deep enough brightness temperature depressions at increasingly high scattering conditions and is not sufficient to capture the phase function structures at size parameters above 2–3; conditions typically found at around 664.0 GHz. When realistic hydrometeor profiles are employed, δ-Eddington leads to a root mean squared error of 1 K, with individual errors between 0 and 4 K. Infrequently, and in localized areas, larger discrepancies are identified, exceeding 10 K. However, these inaccuracies stemming from the simplified physics of RTTOV-SCATT were found at least an order of magnitude smaller than the cloud and precipitation representation errors assigned in data assimilation. Thus, we support the use of RTTOV-SCATT at submillimeter frequencies for operational purposes. Fil: Barlakas, Vasileios. Chalmers University of Technology; Suecia Fil: Galligani, Victoria Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones del Mar y la Atmósfera. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones del Mar y la Atmósfera; Argentina. Instituto Franco-Argentino sobre Estudios del Clima y sus Impactos; Argentina Fil: Geer, Alan J.. European Centre For Medium-range Weather Forecasts; Reino Unido Fil: Eriksson, Patrick. Chalmers University of Technology; Suecia |
description |
With the new generation of microwave instruments and, especially, the Ice Cloud Imager covering submillimeter frequencies, it is necessary to evaluate the performance of the operational Radiative Transfer model for TOVS (RTTOV). Thus, an intercomparison study has been conducted between RTTOV and the reference model ARTS (Atmospheric Radiative Transfer Simulator), with an emphasis on cloudy and precipitating conditions, covering frequencies between ≈53.6 and ≈664.0 GHz. Overall a rather good agreement is found between the δ-Eddington solution embedded in the scattering solver of RTTOV, RTTOV-SCATT, and the discrete ordinate solution embedded in ARTS. Under clear-sky conditions, given a consistent spectroscopy, the agreement is within 0.4 K over all frequencies considered. When idealized, homogeneous cloudy conditions are employed, the agreement is mostly ±2 K; this range is exceeded only at high scattering conditions. However, the following weaknesses are identified: the δ-Eddington solution fails to produce deep enough brightness temperature depressions at increasingly high scattering conditions and is not sufficient to capture the phase function structures at size parameters above 2–3; conditions typically found at around 664.0 GHz. When realistic hydrometeor profiles are employed, δ-Eddington leads to a root mean squared error of 1 K, with individual errors between 0 and 4 K. Infrequently, and in localized areas, larger discrepancies are identified, exceeding 10 K. However, these inaccuracies stemming from the simplified physics of RTTOV-SCATT were found at least an order of magnitude smaller than the cloud and precipitation representation errors assigned in data assimilation. Thus, we support the use of RTTOV-SCATT at submillimeter frequencies for operational purposes. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-06 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/212490 Barlakas, Vasileios; Galligani, Victoria Sol; Geer, Alan J.; Eriksson, Patrick; On the accuracy of RTTOV-SCATT for radiative transfer at all-sky microwave and submillimeter frequencies; Pergamon-Elsevier Science Ltd; Journal of Quantitative Spectroscopy and Radiative Transfer; 283; 6-2022; 1-18 0022-4073 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/212490 |
identifier_str_mv |
Barlakas, Vasileios; Galligani, Victoria Sol; Geer, Alan J.; Eriksson, Patrick; On the accuracy of RTTOV-SCATT for radiative transfer at all-sky microwave and submillimeter frequencies; Pergamon-Elsevier Science Ltd; Journal of Quantitative Spectroscopy and Radiative Transfer; 283; 6-2022; 1-18 0022-4073 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0022407322000747 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jqsrt.2022.108137 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Pergamon-Elsevier Science Ltd |
publisher.none.fl_str_mv |
Pergamon-Elsevier Science Ltd |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844614156890669056 |
score |
13.070432 |