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| Titel |
Evaluation of PBL Parameterization schemes based on Large-eddy Simulation |
| VerfasserIn |
Yuhua Yang, Changhai Liu, Jimy Dudhia, Mitch Moncrieff, Wei Wang, Baode Chen |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250074182
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| Zusammenfassung |
| The performance of two PBL schemes ( YSU and MYJ ) is evaluated by the large-eddy simulation (LES) within the same three-dimensional ARW dynamic framework. The model is initialized with a horizontally homogeneous sounding data set upon which a specified diurnal heat flux forcing and radiative cooling rateare imposed. The unique aspects in the approach are the employment of large-eddy simulations as a benchmark and highly idealized experimental design. Our approach is much easier to isolate the errors associated with a particular physical parameterization tested than that by using real-data simulation. Analysis s of potential temperature and water vapor mixing ratio suggests that YSU over-predicts the mixing showing a higher PBL top with warmer, drier PBL structure than those from the LES, and MYJ under-predicts the mixing having a lower PBL top with colder, moister PBL structure. |
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