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Impact of a Diagnostic Pressure Equation Constraint on Tornadic Supercell Thunderstorm Forecasts Initialized Using 3DVAR Radar Data Assimilation
Joint Authors
Xue, Ming
Ge, Guoqing
Gao, Jidong
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-11-17
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
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.
American Psychological Association (APA)
Ge, Guoqing& Gao, Jidong& Xue, Ming. 2013. Impact of a Diagnostic Pressure Equation Constraint on Tornadic Supercell Thunderstorm Forecasts Initialized Using 3DVAR Radar Data Assimilation. Advances in Meteorology،Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-510511
Modern Language Association (MLA)
Ge, Guoqing…[et al.]. Impact of a Diagnostic Pressure Equation Constraint on Tornadic Supercell Thunderstorm Forecasts Initialized Using 3DVAR Radar Data Assimilation. Advances in Meteorology No. 2013 (2013), pp.1-12.
https://search.emarefa.net/detail/BIM-510511
American Medical Association (AMA)
Ge, Guoqing& Gao, Jidong& Xue, Ming. Impact of a Diagnostic Pressure Equation Constraint on Tornadic Supercell Thunderstorm Forecasts Initialized Using 3DVAR Radar Data Assimilation. Advances in Meteorology. 2013. Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-510511
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-510511