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AROME_WMED for HyMeX

AROME_WMED for HyMeX. M.Nuret, N. Fourrié, E. Bresson, C. Jany, P. Brousseau, A. Doerenbecher and colleagues Météo-France / CNRM-GAME. AROME_WMED. AROME_WMED = special version of the operational model AROME_France for the HyMeX field campaign . non hydrostatic, 2.5km resolution

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AROME_WMED for HyMeX

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  1. AROME_WMED for HyMeX M.Nuret, N. Fourrié, E. Bresson, C. Jany, P. Brousseau, A. Doerenbecher and colleagues Météo-France / CNRM-GAME

  2. AROME_WMED • AROME_WMED = special version • of the operational model AROME_France • for the HyMeX field campaign. • non hydrostatic, 2.5km resolution • assimilation cycle = 3h • boundary conditions = ARPEGE global model

  3. AROME_WMED (periods) + AROME_France oper. (+30hr) * if extra manpower available

  4. AROME_WMED (cycles)

  5. AROME_WMED_oper (Jb) • OPER : Jb_1 • REANA1 : Jb_1 • REANA2 : Jb_2 • Jb_1: computed on a convective case from autumn 2010, ensemble method, 6 perturbed members (36t2) • Jb_2: to be computed on a period from SOP1 (autumn 2012), ensemble method, to be defined …

  6. AROME_WMED_oper (Jb) Variance-covariance matrix of the guess error (= forecast range +3hr) = Jb • 1000hpa • ~10km • 500 hPa • ~15km From: Fourrié et al.,

  7. AROME_WMED (coupling) • OPER : ARPEGE  court   cy36t2 then cy37t1 • REANA1 : ARPEGE  production  cy36t2 then cy37t1 • REANA2 : ARPEGE  production  cy36t2 then cy37t1 • Impact of the coupling is under investigation ( court vs production)

  8. AROME_WMED_oper (relief) • Orography difference AWM_oper – AROME_FRANCE • average 27.56m (- 0.16°C for T2m) (relief AWM_oper = relief ½ envelop) • relief AWM_reana1 = relief AWM_oper

  9. AROME_WMED_oper (observations) • AWM_oper vs AROME_France: • basically, the same incoming observation flux • GPS more (+) data vs pré-HYMEX period, but less (–) data • in AWM_oper vs AROME_France (bias correction scheme issue) • BAMED balloons (V and T) • RS/4M supplementary HYMEX (since mid-October, BUFR/ASCII issue) • in TEMP format • RS KIT (Corse) all taken into account (TEMP format) • Wind Profiler: for SOP1 available from mid october (only Pierrelatte • taken into account, then 5 sites for SOP2 after monitoring) • Specific to AWM_oper (vs AROME_France): • Spanish surface data: more SYNOP • Polar orbiting radiances (AMSU): thinning improved (125km => 80km)

  10. AROME_WMED_oper (observations) • AWM_oper vs AROME_France: nombre d’observations (messages)

  11. AROME_WMED_oper: evaluation • AWM_oper : • real time suite on NEC (TORI, old computer, computation nodes • failures, constraints..) with real time monitoring • AROME_WMED +48h forecasts on 00UTC slot available • ~ 04.30UTC => forecast bulletin ~ 07.00UTC • many technical issues: • real time archiving issues • cycle change • too much radar observations (5/11/2012) • observation extraction •  95% of the forecats on time (SOP1), 93% (SOP2)

  12. AROME_WMED_oper: evaluation T2m Tb IR HU2m Wind(gust) SOP1

  13. AROME_WMED_oper: evaluation Rain SOP1 SOP2

  14. AROME_WMED_oper: evaluation 28/09-00UTC to 29/09-00UTC 29/09-00UTC to 30/09-00UTC IOP8 OBS +48hr +24hr

  15. AROME_WMED_oper: conclusion • AROME_WMED_oper performance is at least similar to • AROME_France, even better for some IOPs (8, 15b) concerning rain • weak cold 2m temperature bias (orography difference) • GPS bias correction issue • AROME_WMED oper and reana1 simulations available on the • HyMeX database

  16. AROME_WMED_reana1 • AWM_rena1 vs AWM_oper: • => observations • observations re-extracted (no cut-off constraint) • + spanish SYNOPs [5/9/2012 – 4/10/2012] • Hu from balloon BAMED • + wind profiler (only Pierrelatte was assimilated in oper. for SOP1): • Pierrelatte+Cld-Ferrand+Candillargues+Perpignan+Marignanne, • availability on GTS mid October. • RS/4M before 10 October 2012 in TEMP format • => configuration • unique cycle (37t1) • forecast maximum range :+54h • coupling: ARPEGE production • period: SOP1

  17. AROME_WMED_reana1 • BAMED balloon: ~ 400 observations (Hu) • Wind profiler: +64% • Radiosonde: +4% • Synop: +2% SOP1 QPF: impact>0 1st period, neutral 2nd period: is cycle change the dominant effect?

  18. AROME_WMED_reana1 AROME_WMED_REANA1 vs AROME_WMED_OPER (validation against surface data = SYNOP) Humidité(%) FF(m/s) Pmer(Hpa) Échéance(h) Échéance(h) Échéance(h) Nébulosité(%) DD(°) T2m(°) Échéance(h) Échéance(h) Échéance(h) => neutral impact

  19. AROME_WMED_reana1 AROME_WMED_REANA1 vs AROME_WMED_OPER (validation against surface data = buoy) • neutral impact From Rainaud R. et al.: « Air-sea exchanges over the Western Mediterranean Sea during the HyMeX SOP1 using the AROME-WMED model », submitted to QJRMS, May 2014.

  20. AROME_WMED_reana1 AROME_WMED_REANA1 vs AROME_WMED_OPER (validation against upper-air data = RS) Géopotential Température Eqm Ect |Biais| Pression(hPa) Échéance(h) => neutral impact Wind Speed Humidité

  21. AROME_WMED_reana1 AROME_WMED_REANA1 vs AROME_WMED_OPER (validation against integrated data = IWV GPS) Réseau validation GPS IWV IWV IWV(mm) Corrélation Échéance(h) Réseau (UTC) => positive impact Humidity

  22. AROME_WMED_reana1 AROME_WMED_REANA1 vs AROME_WMED_OPER (validation against upper air data = F20 dropsondes) Validation network dropsondes F20 Corrélation Modèle-observation(%) (35 dropsondes, ~4000 données) Réseau (UTC) => weak positive impact

  23. AROME_WMED_reana1: conclusion • overall quality of AROME_WMED_oper and • AROME_WMED_reana1 is similar • more data, but no significative improvement, except maybe a weak • signal in QPF during the 1st period (before 25/09/2012) – maybe as • a result of the conjunction of more data and cycle upgrade

  24. AROME_WMED_reana2 • new 38t1cycle on new machine BULL (oper. since 14/01/2014) • doppler winds from Mt Maurel, more SEVIRI radiances over land, • more IASI channels, σo tuned, orography, … • new orography (same as AROME_France oper. which is new in cy38) • new Jb • enhanced observations flux vs AROME_WMED_reana1: • high resolution radiosounding (France, Espagne, RS/4M, • KIT, L’Aquilla, Biscarosse) • dropsondes F20 • reprocessed GPS and biais correction scheme adapted • reprocessed wind profilers • ground-based lidar (Candillargues, Minorque) + airborne • research aircraft measurements (F20, ATR, Dornier) • spanish radar • surface stations (Candillargues, …) …

  25. LIDAR BASIL Quality control issues …

  26. AROME_WMED_reana2 • Work in progress: • AROME_WMED cy38 run with Jb_1 and AROME_WMED_reana1 • observational dataset for SOP1 (« control » run) • evaluation of the coupling strategy • preparation of the observations files, tests • Expected agenda: • Jb_2 : june 2014 • Tests : summer / autumn 2014 • Availability : mid-2015 (M45)

  27. AROME_WMED_reana2 • Questions, comments?

  28. CY38

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