A physical subgrid‐scale information exchange (PSIE) system for parametrization schemes in numerical weather prediction models
A physical subgrid‐scale information exchange (PSIE) system for parametrization schemes in numerical weather prediction models
复制标题
用于数值天气预报模型中参数化方案的物理亚网格级信息交换(PSIE)系统
DOI:
10.1002/qj.3464
复制
发表时间:
--
影响因子:
8.9
通讯作者:
A. Bott
中科院分区:
文献类型:
--
作者:
V. Kuell;A. Bott
The choice and interaction of the parametrization schemes in a numerical weather prediction (NWP) model are crucial for the forecast quality. Because, classically, the parametrization schemes can only communicate to each other via the tendencies of the averaged grid‐scale prognostic variables, a considerable amount of subgrid‐scale informationavailablewithin the schemes is lost.To overcome this problem, subgrid‐scale information should bedirectlyexchanged between the parametrization schemes. In the present paper already existing subgrid‐scale communication paths, which have been successfully used in operational forecasts in the past, are extended to a physical subgrid‐scale information exchange (PSIE) system including all atmospheric parametrization schemes. For our studies we have chosen the parametrization schemes of microphysics, convection, turbulence, fractional cloud cover and radiation. The COSMO model of Deutscher Wetterdienst (DWD) with a grid size of Δx= 7 km serves as the hosting model for the implementation of the PSIE system. However, the couplings are formulated in a way that also allows the PSIE system to be applied to other NWP models. Simulations of real case‐studies of different weather situations are performed and compared to DWD observational precipitation data from RADOLAN (radar measurements calibrated by station data).Visual inspection of precipitation maps reveals that precipitation patterns look more realistic with the full PSIE system, especially during air‐mass convection situations. This is confirmed by fractional skill score (FSS) analyses, which also give an insight into the temporal development of the PSIE effects. The relative impact of the PSIE paths and their interaction is also studied in conjunction with a factor separation analysis.
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DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
V. Kuell;A. Bott
通讯作者:
A. Bott
影响因子:
3.1
作者:
M. Pinsky;A. Khain;H. Krugliak
通讯作者:
H. Krugliak
影响因子:
8.9
作者:
H. Bauer;T. Weusthoff;M. Dorninger;V. Wulfmeyer;T. Schwitalla;T. Gorgas;M. Arpagaus;K. Warrach‐Sagi
通讯作者:
K. Warrach‐Sagi
影响因子:
5.5
作者:
A. Bott
通讯作者:
A. Bott
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
M. Dubal;N. Wood;A. Staniforth
通讯作者:
A. Staniforth