Name: Joshua Gebauer Title: Evaluating the Impact of Rapid-Scan Radar Data on Dual-Doppler Vertical Velocity Retrievals Location: NWC 5600 Date: 05/03/2019 Time: 3:00 PM Series: Convective Meteorology (Mesoscale Dynamics) Abstract: Vertical velocity is the most difficult wind component to retrieve from dual-Doppler analysis, as radial velocities typically poorly capture the vertical
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May 3, 2019 - 3:00 pm
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May 3, 2019 - 4:00 pm
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120 David L Boren Blvd, Norman, OK 73072 View mapCategories
Convective Meteorology (Mesoscale Dynamics)Name: Joshua Gebauer
Title: Evaluating the Impact of Rapid-Scan Radar Data on Dual-Doppler Vertical Velocity Retrievals
Location: NWC 5600
Date: 05/03/2019
Time: 3:00 PM
Series: Convective Meteorology (Mesoscale Dynamics)
Abstract: Vertical velocity is the most difficult wind component to retrieve from dual-Doppler analysis, as radial velocities typically poorly capture the vertical component of the wind. Prior observational system simulation experiments (OSSE) have found that a variational dual-Doppler technique that imposes both a mass conservation and vertical vorticity constraint produces superior vertical velocity estimates when the radar volume scan time is small (~30 secs). Advancements in radar technology have made 30 second volume scans a reality, and the results from the OSSEs should be confirmed using actual rapid scan radar data.
RaXPol and the Atmospheric Imaging Radar (AIR) were used to collect rapid-scan dual-Doppler observations of a thunder storm on 4 September 2018. The maximum volume update time for this dataset was 30 seconds, and therefore this dual-Doppler dataset has one of the fastest volume update times ever collected. Additionally, the Shared Mobile Atmospheric Research and Teaching Radar-3 (SR-3) collected vertically pointing observations under the storm to provide a verification point for the vertical velocity retrieved from the dual-Doppler analysis. The challenges associated with using the rapid-scan dataset, techniques to address those challenges, and initial verification results will be presented.
