Correcting Fast-Mode Pressure Errors in Storm-Scale Ensemble Kalman Filter Analyses
A typical storm-scale ensemble Kalman filter (EnKF) analysis/forecast system is shown to introduce imbalances into the ensemble posteriors that generate acoustic waves in subsequent integrations. When the EnKF is used to research storm-scale dynamics, the resulting spurious pressure oscillations are...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2013-01-01
|
| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2013/624931 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832552601794641920 |
|---|---|
| author | Corey K. Potvin Louis J. Wicker |
| author_facet | Corey K. Potvin Louis J. Wicker |
| author_sort | Corey K. Potvin |
| collection | DOAJ |
| description | A typical storm-scale ensemble Kalman filter (EnKF) analysis/forecast system is shown to introduce imbalances into the ensemble posteriors that generate acoustic waves in subsequent integrations. When the EnKF is used to research storm-scale dynamics, the resulting spurious pressure oscillations are large enough to impact investigation of processes driven by nonhydrostatic pressure gradient forces. Fortunately, thermodynamic retrieval techniques traditionally applied to dual-Doppler wind analyses can be adapted to diagnose the balanced portion of an EnKF pressure analysis, thereby eliminating the fast-mode pressure oscillations. The efficacy of this approach is demonstrated using a high-resolution supercell thunderstorm simulation as well as EnKF analyses of a simulated and a real supercell. |
| format | Article |
| id | doaj-art-e40b8798643f456794945703f684e389 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-e40b8798643f456794945703f684e3892025-02-03T05:58:20ZengWileyAdvances in Meteorology1687-93091687-93172013-01-01201310.1155/2013/624931624931Correcting Fast-Mode Pressure Errors in Storm-Scale Ensemble Kalman Filter AnalysesCorey K. Potvin0Louis J. Wicker1Cooperative Institute for Mesoscale Meteorological Studies, University of Oklahoma, USANOAA/OAR/National Severe Storms Laboratory, National Weather Center, 120 David L. Boren Boulevard, Norman, OK 73072, USAA typical storm-scale ensemble Kalman filter (EnKF) analysis/forecast system is shown to introduce imbalances into the ensemble posteriors that generate acoustic waves in subsequent integrations. When the EnKF is used to research storm-scale dynamics, the resulting spurious pressure oscillations are large enough to impact investigation of processes driven by nonhydrostatic pressure gradient forces. Fortunately, thermodynamic retrieval techniques traditionally applied to dual-Doppler wind analyses can be adapted to diagnose the balanced portion of an EnKF pressure analysis, thereby eliminating the fast-mode pressure oscillations. The efficacy of this approach is demonstrated using a high-resolution supercell thunderstorm simulation as well as EnKF analyses of a simulated and a real supercell.http://dx.doi.org/10.1155/2013/624931 |
| spellingShingle | Corey K. Potvin Louis J. Wicker Correcting Fast-Mode Pressure Errors in Storm-Scale Ensemble Kalman Filter Analyses Advances in Meteorology |
| title | Correcting Fast-Mode Pressure Errors in Storm-Scale Ensemble Kalman Filter Analyses |
| title_full | Correcting Fast-Mode Pressure Errors in Storm-Scale Ensemble Kalman Filter Analyses |
| title_fullStr | Correcting Fast-Mode Pressure Errors in Storm-Scale Ensemble Kalman Filter Analyses |
| title_full_unstemmed | Correcting Fast-Mode Pressure Errors in Storm-Scale Ensemble Kalman Filter Analyses |
| title_short | Correcting Fast-Mode Pressure Errors in Storm-Scale Ensemble Kalman Filter Analyses |
| title_sort | correcting fast mode pressure errors in storm scale ensemble kalman filter analyses |
| url | http://dx.doi.org/10.1155/2013/624931 |
| work_keys_str_mv | AT coreykpotvin correctingfastmodepressureerrorsinstormscaleensemblekalmanfilteranalyses AT louisjwicker correctingfastmodepressureerrorsinstormscaleensemblekalmanfilteranalyses |