On the Sensitivity of Convective Cold Pools to Mesh Resolution
Abstract It is well recognized that triggering of convective cells through cold pools (CPs) is key to the organization of convection. Yet, numerous studies have found that both the characterization and parameterization of CP effects in numerical models is cumbersome—in part due to the lack of numeri...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Geophysical Union (AGU)
2023-08-01
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| Series: | Journal of Advances in Modeling Earth Systems |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2022MS003382 |
| _version_ | 1797332018994872320 |
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| author | Romain Fiévet Bettina Meyer Jan O. Haerter |
| author_facet | Romain Fiévet Bettina Meyer Jan O. Haerter |
| author_sort | Romain Fiévet |
| collection | DOAJ |
| description | Abstract It is well recognized that triggering of convective cells through cold pools (CPs) is key to the organization of convection. Yet, numerous studies have found that both the characterization and parameterization of CP effects in numerical models is cumbersome—in part due to the lack of numerical convergence with respect to the horizontal mesh resolution, Δx, obtained in typical cloud‐resolving simulators. Within a comprehensive numerical convergence study we systematically increase the horizontal resolution in a set of idealized large‐eddy simulations. Our analysis captures key CP processes, namely free propagation, frontal collision and merging of gust fronts. We characterize the numerical convergence of tropospheric moistening rates, gust front vortical strength and propagation speed, and the amplitude of the lobe‐and‐cleft instability. The understanding gained from this analysis may help develop robust subgrid models for CP dynamics. |
| first_indexed | 2024-03-08T07:43:36Z |
| format | Article |
| id | doaj.art-0be3fb94665443679dd9f0c8747917de |
| institution | Directory Open Access Journal |
| issn | 1942-2466 |
| language | English |
| last_indexed | 2024-03-08T07:43:36Z |
| publishDate | 2023-08-01 |
| publisher | American Geophysical Union (AGU) |
| record_format | Article |
| series | Journal of Advances in Modeling Earth Systems |
| spelling | doaj.art-0be3fb94665443679dd9f0c8747917de2024-02-02T16:41:18ZengAmerican Geophysical Union (AGU)Journal of Advances in Modeling Earth Systems1942-24662023-08-01158n/an/a10.1029/2022MS003382On the Sensitivity of Convective Cold Pools to Mesh ResolutionRomain Fiévet0Bettina Meyer1Jan O. Haerter2Niels Bohr Institute University of Copenhagen Copenhagen DenmarkNiels Bohr Institute University of Copenhagen Copenhagen DenmarkNiels Bohr Institute University of Copenhagen Copenhagen DenmarkAbstract It is well recognized that triggering of convective cells through cold pools (CPs) is key to the organization of convection. Yet, numerous studies have found that both the characterization and parameterization of CP effects in numerical models is cumbersome—in part due to the lack of numerical convergence with respect to the horizontal mesh resolution, Δx, obtained in typical cloud‐resolving simulators. Within a comprehensive numerical convergence study we systematically increase the horizontal resolution in a set of idealized large‐eddy simulations. Our analysis captures key CP processes, namely free propagation, frontal collision and merging of gust fronts. We characterize the numerical convergence of tropospheric moistening rates, gust front vortical strength and propagation speed, and the amplitude of the lobe‐and‐cleft instability. The understanding gained from this analysis may help develop robust subgrid models for CP dynamics.https://doi.org/10.1029/2022MS003382cold poolsnumerical simulationmesh resolutioncloud convection |
| spellingShingle | Romain Fiévet Bettina Meyer Jan O. Haerter On the Sensitivity of Convective Cold Pools to Mesh Resolution Journal of Advances in Modeling Earth Systems cold pools numerical simulation mesh resolution cloud convection |
| title | On the Sensitivity of Convective Cold Pools to Mesh Resolution |
| title_full | On the Sensitivity of Convective Cold Pools to Mesh Resolution |
| title_fullStr | On the Sensitivity of Convective Cold Pools to Mesh Resolution |
| title_full_unstemmed | On the Sensitivity of Convective Cold Pools to Mesh Resolution |
| title_short | On the Sensitivity of Convective Cold Pools to Mesh Resolution |
| title_sort | on the sensitivity of convective cold pools to mesh resolution |
| topic | cold pools numerical simulation mesh resolution cloud convection |
| url | https://doi.org/10.1029/2022MS003382 |
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