A Pan-African Convection-Permitting Regional Climate Simulation with the Met Office Unified Model: CP4-Africa
| العنوان: | A Pan-African Convection-Permitting Regional Climate Simulation with the Met Office Unified Model: CP4-Africa |
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| المؤلفون: | Cyril J. Morcrette, Alison Stirling, Christopher M. Taylor, Sonja S. Folwell, Ian A. Boutle, Catherine A. Senior, Stuart Webster, James Manners, C. J. Short, Jonathan M. Wilkinson, Simon Tucker, Adrian Lock, Paul Earnshaw, Elizabeth J. Kendon, Rachel Stratton, Andrew J. Malcolm, Simon Vosper |
| المصدر: | Journal of Climate. 31:3485-3508 |
| بيانات النشر: | American Meteorological Society, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Convection, Atmospheric Science, 010504 meteorology & atmospheric sciences, Equator, Unified Model, Forcing (mathematics), Atmospheric model, 010502 geochemistry & geophysics, Grid, 01 natural sciences, Domain (software engineering), Meteorology and Climatology, Climatology, Environmental science, Climate model, 0105 earth and related environmental sciences |
| الوصف: | A convection-permitting multiyear regional climate simulation using the Met Office Unified Model has been run for the first time on an Africa-wide domain. The model has been run as part of the Future Climate for Africa (FCFA) Improving Model Processes for African Climate (IMPALA) project, and its configuration, domain, and forcing data are described here in detail. The model [Pan-African Convection-Permitting Regional Climate Simulation with the Met Office UM (CP4-Africa)] uses a 4.5-km horizontal grid spacing at the equator and is run without a convection parameterization, nested within a global atmospheric model driven by observations at the sea surface, which does include a convection scheme. An additional regional simulation, with identical resolution and physical parameterizations to the global model, but with the domain, land surface, and aerosol climatologies of CP4-Africa, has been run to aid in the understanding of the differences between the CP4-Africa and global model, in particular to isolate the impact of the convection parameterization and resolution. The effect of enforcing moisture conservation in CP4-Africa is described and its impact on reducing extreme precipitation values is assessed. Preliminary results from the first five years of the CP4-Africa simulation show substantial improvements in JJA average rainfall compared to the parameterized convection models, with most notably a reduction in the persistent dry bias in West Africa, giving an indication of the benefits to be gained from running a convection-permitting simulation over the whole African continent. |
| وصف الملف: | text |
| تدمد: | 1520-0442 0894-8755 |
| DOI: | 10.1175/jcli-d-17-0503.1 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9243ce76017e5865e6fa3b8fd9d79d73 https://doi.org/10.1175/jcli-d-17-0503.1 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....9243ce76017e5865e6fa3b8fd9d79d73 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15200442 08948755 |
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| DOI: | 10.1175/jcli-d-17-0503.1 |