french contribution to t-nawdex
DESCRIPTION
French contribution to T-NAWDEX. G. Rivière, P. Arbogast CNRM-GAME, CNRS & Météo-France. Karlsruhe, 03/20/2013. French teams / labs involved in T-NAWDEX topics. CNRM-GAME (Joint lab between Météo-France and CNRS) - PowerPoint PPT PresentationTRANSCRIPT
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French contribution to T-NAWDEX
G. Rivière, P. Arbogast
CNRM-GAME, CNRS & Météo-France
Karlsruhe, 03/20/2013
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French teams / labs involved in T-NAWDEX topics
CNRM-GAME (Joint lab between Météo-France and CNRS)
• Dynamical synoptic meteorology (P. Arbogast, G. Rivière, A. Joly, M. Drouard, B. Coronel)
• Adaptive observations / assimilation (N. Fourrié, A. Doerenbecher)
• Ensemble prediction (C. Labadie, P. Cebron, B. Joly)
Laboratoire d’aérologie
• Mesoscale group (E. Richard, J-P. Chaboureau, D. Lambert, S. Fresnay)
Laboratoire de Météorologie Dynamique
• Mesoscale and synoptic meteorology (C. Claud, G. Lapeyre)
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Recent activitiesCNRS-INSU project: EPIGONE (Excitation, propagation and impact of the North Atlantic waveguide over Europe, 2010-2012).
Idealized case study
Winter storm case studies using operational forecast model
Storm Xynthia
3 PhDs:
• Trajectory and deepening of extratropical storms (L. Oruba)
• Extratropical transition of tropical cyclones (F. Pantillon)
• Rossby wave breaking and Atlantic weather regime transitions (C. Michel)
Analysis of hurricane Helene (use of very-high resol NH model over the whole Atlantic)
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Current activities and near futureDYNASTIE (DYNamics of the Atlantic Storm-Track and its Impact over Europe) ; submitted to ANR; 3 years (2014-2016); requested funds: 340 k€.
Main objectives:
• To analyze the dynamics and predictability of the North Atlantic waveguide from various numerical approaches
• To prepare scientific questions to address during T-NAWDEX
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Potential airborne measurements: Falcon 20 (mid- to upper troposphere)
Flying performances:• Usual cruising speed : 150 m/s (min 82m/s max 254 m/s)
• Max. endurance: 5 h
• Max range: 4100 km
• Ceiling: 42 000 ft (12000 m)
Possible measurements:• Radar RASTA reflectivity
(IWC, droplet size)
• Lidar « retrodiffusion » (semi-transparent cloud, BL)
• Drop sonde launching (profiles of T, p, hum, u, v, w)
Time (h)
Hei
ght (
km)
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Potential airborne measurements: ATR 42 (low to mid-troposphere
Flying performances:
• Usual cruising speed : 100m/s (min 70m/s max 134 m/s)• Max. endurance: 6 h• Max range at 4000m: 3000km• Ceiling: 25000 ft (7500 m)
Examples of measurements:
• In-situ microphysics (cloud liquid water content, droplet size)
• Turbulence (heat fluxes, momentum flux)
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French contribution to measurements: Boundary-layer Balloons
Aeroclipper: Need of convergent winds to attract the balloon into the system of interest (first success for a tropical cyclone, Vasco, 2007). Sampling at 50m.
Usefulness for sampling starting regions of warm conveyor belts in the boundary layer ?
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Météo-France forecast products: deterministic forecasts of the global model
Deterministic forecast from a global model (ARPEGE)
Web site dedicated to the
DIAMET field campaign
Probable resolution in 2016: 7 km over Western Europe
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Météo-France forecast products: ensemble forecast
Ensemble forecast from the global ARPEGE model (35 members; cyclone trajectories)
Probable resolution in 2016: ~10 km over Western Europe
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Météo-France forecast products: satellite data inversion
Relative humidity satellite retrieval
Relative humidity analysis
longitude
lati
tude
pres
sure
pres
sure
longitude
Microwave humidity sounder from IASI
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Other potential forecast productsSensitivity to PV anomalies on real time.
Example of winter storm Klaus: tropopause height
Operational forecast Modified forecast
Wind speed at 10m
Observations
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Concluding remarks / questions
• Boundary-layer balloons potentially useful for ETs Choice of the period (Fall, winter ?).
• Aircrafts with a lesser range more adapted for downstream impact over Europe (sting jets ?)
• funding issues: Balloons (CNES), aircrafts (ANR?, FP7-8) ?