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Preliminary results with the LaMP X band radar J. Van Baelen¹, Y. Pointin¹, F. Tridon¹, and M. Hagen² 1°/ Laboratoire de Météorologie Physique, Observatoire de Physique du Globe de Clermont-Ferrand, 2°/ Institut für Physik der Atmosphäre, DLR – Oberpfaffenhofen.
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Ι / LaMP contribution to COPS
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LaMP contributions to COPS Super site Vosges (mountain): Scanning X band precipitation radar
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X band radar characteristics Site: Bischenberg 48°28’45” N / 7°28’29” E Operations: 15 Jun. – 29 Aug. Resolutions: Range 60 m. Azimuth 2° Time 30 sec. Data base: All POI PNGs are available on ftpobs.univ-bpclermont.fr/exterieur/JVB Reprocessing under way Z & Rs available later
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LaMP contributions to COPS Super site Vosges (mountain): Scanning X band precipitation radar Super site Vosges (valley): Micro Rain Radar K band profiler Raingage and J-W disdrometer
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MRR characteristics Site: Niedernai 48°26’53” N 7°31’33” E Operations: 14 Jun. – 30 Aug. Resolutions: Vertical 100m. Max range 3000m. Time 20 sec. Data base: All MRR measurements are on Data Base (format similar to all other COPS MRRs) Raingage data in preparation (example format ?)
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LaMP contributions to COPS Super site Vosges (mountain): Scanning X band precipitation radar Super site Vosges (valley): Micro Rain Radar K band profiler Rain gage and J-W disdrometer GPS network / IWV and tomography Cloud microphysics model
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ΙΙ / Observations
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Real Time Data / Animation of last 2 h on line Entzheim Mutsig Grendelbruche Mt Sainte Odile Champ du Feu Trees V
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The X-Rad Horror show !
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Impact on measurements
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ΙΙΙ / Preliminary results
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New X-band radar visualization
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Impact on measurements
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Monthly Cumulated Rains
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IOP14 V-site rain event
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Reflectivity comparisons and Rain Rate Estimates
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IOP 15 Contrasted behavior when comparing 12 and 13 of August Cell generation: 12: Crests 13: Foothills Evolution: 12: Stationnary at first then slow drift before disappearing on plains 13: Reinforcement together with motion to the East
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POLDIRAD: Cell Tracking IOP 15 12 Aug. 2007 11-17 UTC 13 Aug. 2007 8-15 UTC cell tracks first occurrence X Rad
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August 12 (12:00 – 15:00 UTC)
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August 13 (12:30 – 13:30 UTC)
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ΙV / What’s next ?
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Future work & Objectives Combined studies with MRR in order to retrieve adapted Z-R relationships and improve rain rate estimations Comparisons with other radars (POLDIRAD + DOW) and instruments Link radar observations with humidity field structure and evolution (GPS tomography and airborne measurements) Detailed study of precipitation events within their meteorological context Comparison with LaMP microphysical simulations
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That’s all for now ! Questions ?
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Primary IOPs of interest Criterions Precipitations seen by X band radar Measurements with POLDIRAD & DOW Airborne measurements Selection IOP 7 IOP 14 IOP 15 IOP 12 IOP 10 Others: IOP 5 – 6, days 21/6 - 16/8, ATR flights
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Tomography (coarse) primer ! 12 Aug. 11:00
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