Academic Journal
Modelling of the Thermodynamical Diurnal Cycle in the Lower Atmosphere : A Joint Evaluation of Four Contrasted Regimes in the Tropics Over Land
| العنوان: | Modelling of the Thermodynamical Diurnal Cycle in the Lower Atmosphere : A Joint Evaluation of Four Contrasted Regimes in the Tropics Over Land |
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| المؤلفون: | Couvreux, F., Guichard, F., Gounou, A., Bouniol, D., Peyrillé, P., Köhler, M. |
| المساهمون: | Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS), Deutscher Wetterdienst Offenbach (DWD) |
| المصدر: | ISSN: 0006-8314. |
| بيانات النشر: | HAL CCSD Springer Verlag |
| سنة النشر: | 2013 |
| المجموعة: | Météo-France: HAL |
| مصطلحات موضوعية: | African Monsoon, Multidisciplinary Analysis campaign, Diurnal cycle, Single-column model, Surface-atmosphere-cloud interactions, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology |
| الوصف: | International audience ; The diurnal cycle is an important mode of variability in the Tropics that is not correctly predicted by numerical weather prediction models. The African Monsoon Multidisciplinary Analyses program provided for the first time a large dataset to document the diurnal cycle over West Africa. In order to assess the processes and mechanisms that are crucial for the representation of the diurnal cycle, four different regimes that characterize the varying conditions encountered over land along a surface-temperature gradient are selected. A single-column modelling framework is used in order to relate the features of the simulated diurnal cycle to physical processes in these four distinct cases. Particular attention is given to providing realistic initial and boundary conditions at the surface and in the atmosphere, enabling the use of independent data for the evaluation of the simulations. The study focuses on the simulation of the surface energy budget and low-level characteristics and analyzes the balance between cloud/surface/boundary-layer processes at the sub-diurnal time scale. The biases and drawbacks of the simulations are found to change along the temperature gradient but they always involve the representation of clouds. They also explain parts of the bias obtained with the same model when used in a less constrained configuration. Surface-atmosphere-cloud interactions arising at the sub-diurnal time scale are invoked to explain the distinct features of the low-level diurnal cycle observed over West Africa. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | meteo-00983855; https://meteofrance.hal.science/meteo-00983855 |
| DOI: | 10.1007/s10546-013-9862-6 |
| الاتاحة: | https://meteofrance.hal.science/meteo-00983855 https://doi.org/10.1007/s10546-013-9862-6 |
| رقم الانضمام: | edsbas.A445EF25 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1007/s10546-013-9862-6 |
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