To the origin of a wintertime screen-level temperature bias at high altitude in a kilometric NWP model
To the origin of a wintertime screen-level temperature bias at high altitude in a kilometric NWP model
Simple item page
Full item details
- dc.contributor.author
- Gouttevin, Isabelle
- Vionnet, Vincent
- Seity, Yann
- Boone, Aaron
- Lafaysse, Matthieu
- Deliot, Yannick
- Merzisen, Hugo
- dc.date.accepted
- 2022-09-23
- dc.date.accessioned
- 2024-02-12T19:49:30Z
- dc.date.available
- 2024-02-12T19:49:30Z
- dc.date.issued
- 2023-01-01
- dc.date.submitted
- 2021-10-15
- dc.description.abstract - en
- High-resolution numerical weather prediction (NWP) systems present a strong potential to provide meteorological information in alpine terrain for diverse applications. However, they still suffer from biases highly detrimental for practical purposes. In this study, we investigate the origin of a significant wintertime screen-level temperature bias in forecasts of the AROME-France NWP system in high-altitude, snow-covered alpine terrain. For this purpose, a thorough set of meteorological and snow observations from two high-altitude instrumental sites is used. Targeted numerical simulations are carried out to disentangle the contributions to this bias coming from atmospheric fields, from the snow scheme, and from the coupling between the snowpack and the atmosphere. At both sites, the wind speed and incoming longwave radiation appear significantly negatively biased in AROME in the winter season. Using targeted offline simulations, we show that the simulation errors in these screen-level fields contribute to an average of 67% of the screen-level temperature bias of AROME, while the contribution of errors in the incoming shortwave radiation is negligible. Additionally, the screen-level temperature of AROME is not majorly impacted by changes in the complexity and especially the vertical layering of the snow model. However, it appears particularly sensitive to the parameterization of turbulent fluxes in stable conditions. Evidence suggest that these findings could at least partially be generalized to the whole AROME-France alpine domain. Hence, reducing the high-altitude, winter screen-level temperature bias in AROME may in great part proceed from improving the simulation of atmospheric fields and eliminating some bias compensations in the model.
- dc.description.fosrcfull - en
- Copyright [2023] American Meteorological Society (AMS). For permission to reuse any portion of this Work, please contact <a href = "mailto: permissions@ametsoc.org">permissions@ametsoc.org</a>. Any use of material in this Work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC § 108) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. All AMS journals and monograph publications are registered with the Copyright Clearance Center (<a href="https://www.copyright.com">https://www.copyright.com</a>). Additional details are provided in the AMS Copyright Policy statement, available on the AMS website (<a href="https://www.ametsoc.org/PUBSCopyrightPolicy">https://www.ametsoc.org/PUBSCopyrightPolicy</a>)
- dc.description.fosrcfull-fosrctranslation - fr
- Droit d'auteur [2023] American Meteorological Society (AMS). Pour obtenir l'autorisation de réutiliser toute partie de cette œuvre, veuillez contacter <a href = "mailto: permissions@ametsoc.org">permissions@ametsoc.org</a>. Toute utilisation d'un élément de cette œuvre considérée comme une "utilisation équitable" par l'article 107 de la loi américaine sur le droit d'auteur (U.S. Copyright Act, 17 U.S. Code § 107) ou satisfaisant aux conditions énoncées à l'article 108 de la loi américaine sur le droit d'auteur (U.S. Copyright Act, 17 U.S. Code § 108) ne requiert pas l'autorisation de l'AMS. La republication, la reproduction systématique, l'affichage sous forme électronique, par exemple sur un site web ou dans une base de données interrogeable, ou toute autre utilisation de ce matériel, à l'exception de ce qui est exempté par la déclaration ci-dessus, nécessite une autorisation écrite ou une licence de la part de l'AMS. Toutes les revues et monographies de l'AMS sont enregistrées auprès du Copyright Clearance Center (<a href="https://www.copyright.com">https://www.copyright.com</a>). Des détails supplémentaires sont prévu dans la déclaration de politique de droit d'auteur de l'AMS, disponible sur le site web de l'AMS (<a href="https://www.ametsoc.org/PUBSCopyrightPolicy">https://www.ametsoc.org/PUBSCopyrightPolicy</a>)
- dc.identifier.doi
- https://doi.org/10.1175/JHM-D-21-0200.1
- dc.identifier.issn
- 1525-755X
- 1525-7541
- dc.identifier.uri
- https://open-science.canada.ca/handle/123456789/1931
- dc.language.iso
- en
- dc.publisher
- American Meteorological Society
- dc.rights.openaccesslevel - en
- Green
- dc.rights.openaccesslevel - fr
- Vert
- dc.subject - en
- Nature and environment
- Science and technology
- Climate
- dc.subject - fr
- Nature et environnement
- Sciences et technologie
- Climat
- dc.subject.en - en
- Nature and environment
- Science and technology
- Climate
- dc.subject.fr - fr
- Nature et environnement
- Sciences et technologie
- Climat
- dc.title - en
- To the origin of a wintertime screen-level temperature bias at high altitude in a kilometric NWP model
- dc.type - en
- Article
- dc.type - fr
- Article
- local.article.journalissue
- 1
- local.article.journaltitle
- Journal of Hydrometeorology
- local.article.journalvolume
- 24
- local.pagination
- 53–71
- local.peerreview - en
- Yes
- local.peerreview - fr
- Oui
- local.requestdoi
- No
Download(s)
Original bundle
1 - 1 of 1
Name: OriginWintertimeScreenLevelTemperatureBiasHighAltitudeKilometricNWPmodel.pdf
Size: 4.81 MB
Format: PDF
Collection(s)