دورية أكاديمية
Impact of a Diagnostic Pressure Equation Constraint on Tornadic Supercell Thunderstorm Forecasts Initialized Using 3DVAR Radar Data Assimilation
| العنوان: | Impact of a Diagnostic Pressure Equation Constraint on Tornadic Supercell Thunderstorm Forecasts Initialized Using 3DVAR Radar Data Assimilation |
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| المؤلفون: | Guoqing Ge, Jidong Gao, Ming Xue |
| المصدر: | Advances in Meteorology, Vol 2013 (2013) |
| بيانات النشر: | Wiley, 2013. |
| سنة النشر: | 2013 |
| المجموعة: | LCC:Meteorology. Climatology |
| مصطلحات موضوعية: | Meteorology. Climatology, QC851-999 |
| الوصف: | A diagnostic pressure equation constraint has been incorporated into a storm-scale three-dimensional variational (3DVAR) data assimilation system. This diagnostic pressure equation constraint (DPEC) is aimed to improve dynamic consistency among different model variables so as to produce better data assimilation results and improve the subsequent forecasts. Ge et al. (2012) described the development of DPEC and testing of it with idealized experiments. DPEC was also applied to a real supercell case, but only radial velocity was assimilated. In this paper, DPEC is further applied to two real tornadic supercell thunderstorm cases, where both radial velocity and radar reflectivity data are assimilated. The impact of DPEC on radar data assimilation is examined mainly based on the storm forecasts. It is found that the experiments using DPEC generally predict higher low-level vertical vorticity than the experiments not using DPEC near the time of observed tornadoes. Therefore, it is concluded that the use of DPEC improves the forecast of mesocyclone rotation within supercell thunderstorms. The experiments using different weighting coefficients generate similar results. This suggests that DPEC is not very sensitive to the weighting coefficients. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1687-9309 1687-9317 |
| Relation: | https://doaj.org/toc/1687-9309; https://doaj.org/toc/1687-9317 |
| DOI: | 10.1155/2013/947874 |
| URL الوصول: | https://doaj.org/article/bc4820cf8be3457498476d0c1be9320a |
| رقم الأكسشن: | edsdoj.bc4820cf8be3457498476d0c1be9320a |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 16879309 16879317 |
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| DOI: | 10.1155/2013/947874 |