Impact of the Microphysics in HARMONIE-AROME on Fog
This study concerns the impact of microphysics on the HARMONIE-AROME NWP model. In particular, the representation of cloud droplets in the single-moment bulk microphysics scheme is examined in relation to fog forecasting. We focus on the shape parameters of the cloud droplet size distribution and re...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Atmosphere |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4433/13/12/2127 |
| _version_ | 1797461488330342400 |
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| author | Sebastián Contreras Osorio Daniel Martín Pérez Karl-Ivar Ivarsson Kristian Pagh Nielsen Wim C. de Rooy Emily Gleeson Ewa McAufield |
| author_facet | Sebastián Contreras Osorio Daniel Martín Pérez Karl-Ivar Ivarsson Kristian Pagh Nielsen Wim C. de Rooy Emily Gleeson Ewa McAufield |
| author_sort | Sebastián Contreras Osorio |
| collection | DOAJ |
| description | This study concerns the impact of microphysics on the HARMONIE-AROME NWP model. In particular, the representation of cloud droplets in the single-moment bulk microphysics scheme is examined in relation to fog forecasting. We focus on the shape parameters of the cloud droplet size distribution and recent changes to the representation of the cloud droplet number concentration (CDNC). Two configurations of CDNC are considered: a profile that varies with height and a constant one. These aspects are examined together since few studies have considered their combined impact during fog situations. We present a set of six experiments performed for two non-idealised three-dimensional case studies over the Iberian Peninsula and the North Sea. One case displays both low clouds and fog, and the other shows a persistent fog field above sea. The experiments highlight the importance of the considered parameters that affect droplet sedimentation, which plays a key role in modelled fog. We show that none of the considered configurations can simultaneously represent all aspects of both cases. Hence, continued efforts are needed to introduce relationships between the governing parameters and the relevant atmospheric conditions. |
| first_indexed | 2024-03-09T17:20:07Z |
| format | Article |
| id | doaj.art-643e263443884f36b4ea8f2556a800ed |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-09T17:20:07Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-643e263443884f36b4ea8f2556a800ed2023-11-24T13:13:24ZengMDPI AGAtmosphere2073-44332022-12-011312212710.3390/atmos13122127Impact of the Microphysics in HARMONIE-AROME on FogSebastián Contreras Osorio0Daniel Martín Pérez1Karl-Ivar Ivarsson2Kristian Pagh Nielsen3Wim C. de Rooy4Emily Gleeson5Ewa McAufield6Research & Development Weather and Climate Models, Royal Netherlands Meteorological Institute (KNMI), P.O. Box 201, 3730 AE De Bilt, The NetherlandsAgencia Estatal de Meteorología (AEMET), 28071 Madrid, SpainSwedish Meteorological and Hydrological Institute (SMHI), SE-601 76 Norrköping, SwedenDanish Meteorological Institute (DMI), DK-2100 Copenhagen, DenmarkResearch & Development Weather and Climate Models, Royal Netherlands Meteorological Institute (KNMI), P.O. Box 201, 3730 AE De Bilt, The NetherlandsIrish Meteorological Service (Met Éireann), 67 Glasnevin Hill, Glasnevin, D09 Y921 Dublin, IrelandIrish Meteorological Service (Met Éireann), 67 Glasnevin Hill, Glasnevin, D09 Y921 Dublin, IrelandThis study concerns the impact of microphysics on the HARMONIE-AROME NWP model. In particular, the representation of cloud droplets in the single-moment bulk microphysics scheme is examined in relation to fog forecasting. We focus on the shape parameters of the cloud droplet size distribution and recent changes to the representation of the cloud droplet number concentration (CDNC). Two configurations of CDNC are considered: a profile that varies with height and a constant one. These aspects are examined together since few studies have considered their combined impact during fog situations. We present a set of six experiments performed for two non-idealised three-dimensional case studies over the Iberian Peninsula and the North Sea. One case displays both low clouds and fog, and the other shows a persistent fog field above sea. The experiments highlight the importance of the considered parameters that affect droplet sedimentation, which plays a key role in modelled fog. We show that none of the considered configurations can simultaneously represent all aspects of both cases. Hence, continued efforts are needed to introduce relationships between the governing parameters and the relevant atmospheric conditions.https://www.mdpi.com/2073-4433/13/12/2127fogcloud microphysicsHARMONIE-AROMEnumerical weather prediction (NWP)cloud droplet number concentrationcloud droplet size distribution |
| spellingShingle | Sebastián Contreras Osorio Daniel Martín Pérez Karl-Ivar Ivarsson Kristian Pagh Nielsen Wim C. de Rooy Emily Gleeson Ewa McAufield Impact of the Microphysics in HARMONIE-AROME on Fog Atmosphere fog cloud microphysics HARMONIE-AROME numerical weather prediction (NWP) cloud droplet number concentration cloud droplet size distribution |
| title | Impact of the Microphysics in HARMONIE-AROME on Fog |
| title_full | Impact of the Microphysics in HARMONIE-AROME on Fog |
| title_fullStr | Impact of the Microphysics in HARMONIE-AROME on Fog |
| title_full_unstemmed | Impact of the Microphysics in HARMONIE-AROME on Fog |
| title_short | Impact of the Microphysics in HARMONIE-AROME on Fog |
| title_sort | impact of the microphysics in harmonie arome on fog |
| topic | fog cloud microphysics HARMONIE-AROME numerical weather prediction (NWP) cloud droplet number concentration cloud droplet size distribution |
| url | https://www.mdpi.com/2073-4433/13/12/2127 |
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