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Wyświetlanie 1-2 z 2
Tytuł:
Influence of computational grid resolution on the quality of forecasts of dangerous convection phenomena: a case study of August 11, 2017
Autorzy:
Mazur, Andrzej
Duniec, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2166587.pdf
Data publikacji:
2022
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:
meteorological model
supercell
high-resolution approach
convection-permitting scale
Opis:
On August 11, 2017, a violent convection phenomenon took place in northwestern Poland, i.e., a storm combined with intense rainfall and hurricane winds. This paper presents an attempt to analyze this case by using the results of a numerical weather model, at grid spacings of 7 km, 2.8 km, and 0.7 km. Various convective indicators were analyzed to assess the nature of the event. The key question the authors try to answer is: „To what extent, if any, did a tenfold increase in resolution improve the quality of the numerical forecasts?” This question, however, has not been conclusively resolved. The most likely cause of this event was a supercell rapidly moving from south to northeast. This supercell's path has been mapped (qualitatively at least) by the Supercell Detection Index at all resolutions used. As the resolution increased, the forecasted maximum gusts also increased from 25 m/s in the domain with a resolution of 7 km to 35 m/s at a resolution of 2.8 km and up to about 50 m/s at the highest resolution of 0.7 km. A key conclusion is that the results of the model at a resolution of 2.8 km are much closer to reality than at 7 km. This effect did not pertain to differences between the 2.8 km and 0.7 km models. The latter increase in resolution did not significantly improve the quality of the forecast.
Źródło:
Meteorology Hydrology and Water Management. Research and Operational Applications; 2022, 10, 2; 1--18
2299-3835
2353-5652
Pojawia się w:
Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Parameterization of Some physical processes in Soils on Numerical meteorological Forecasts of Surface Fields
Autorzy:
Mazur, Andrzej
Duniec, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2134727.pdf
Data publikacji:
2017-02-10
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Soil-plant-water system
Hydrodynamics of porous media
parameterization schemes
multilayer soil model
Numerical weather prediction
Opis:
physical processes in soil-plant-water system are very complicated. Complex physical processes in soil, in particular interaction between soilplant-water system have signicfiant inuflence on processes in planetary Boundary layer. Changes of soil state can signicfiantly modify processes in the pBl and meteorological efilds . Since numerical models are to determine the forecast of high quality, the physical processes occurring in soil should be properly described and then appropriately introduced into a model. every process in soil occurs on a smaller scale than original model's domain, so it should be described via adequate parameterization. Overall, soil parameterizations implemented in current numerical weather prediction (NWp) model(s) were prepared almost 40 years ago, when NWp models worked with very poor resolution mesh. Since nowadays NWp works over domains of high resolution, these “old” schemes parameterization must be adequately revised. In this paper preliminary results of changes of parameterization of soil processes will be presented.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2016, 20, 4; 48-58
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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