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VERSUS: Requirements for TEMPs and windprofilers Francis Schubiger & Christophe Hug MeteoSwiss

VERSUS: Requirements for TEMPs and windprofilers Francis Schubiger & Christophe Hug MeteoSwiss. VERSUS meeting Langen (D), 4 March 2010. Requirements for TEMPs verification (1). Verification: for all 12h (wind alone also for all 6h) starting at +0h at surface and on the following p-levels:

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VERSUS: Requirements for TEMPs and windprofilers Francis Schubiger & Christophe Hug MeteoSwiss

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  1. VERSUS:Requirements forTEMPs and windprofilersFrancis Schubiger & Christophe HugMeteoSwiss VERSUS meeting Langen (D), 4 March 2010

  2. Requirements for TEMPs verification (1) • Verification: • for all 12h (wind alone also for all 6h) starting at +0h • at surface and on the following p-levels: • from 1000 to 850 hPa: for each 25 hPa • from 850 to 100 hPa for each 50 hPa • 70, 50 and 30 hPa • wind direction only for wind speed > 3m/s • MeteoSwiss can provide fortran-code for vertical interpolation onto p-levels and onto z-levels (subroutines inside fieldextra)

  3. COSMO-2 COSMO-7 TEMPS verification Payerne: Summer 2009 wind speed: forecasts + 24h bias Standard deviation

  4. Requirements for TEMPs verification (2) • Strategy at MeteoSwiss: • Verification with OBS and MOD in „l2b-format“ • OBS: BUFR -> l2b • MOD: GRIB -> l2e • Suggested strategy for VERSUS: • OBS: read BUFR directly in VERSUS and vertical interpolation for all verification p-levels • MOD: read GRIB (all model levels of U,V,QV,QC,T,P needed) with fieldextra and produce an output („l2b-format or eventually pseudo-BUFR) with profiles at all TEMP-gridpoints for all verification p-levels

  5. L2e-format

  6. l2e-format • H010912040000 53 model gp v-profile • M 52 66369-170000000 43000004 20000 20000 -1460000 -3120000 • *53000020485 4680 6939909120400000000063 • 70 9514 485 49 11 217 449 002 -.9999E+04 -.9999E+04 -.9900E+02 • 00 9503 494 50 13 217 444 003 0.5234E-02 0.0000E+00 0.9153E+02 • 00 9476 518 50 13 221 594 004 0.5241E-02 0.0000E+00 0.9140E+02 • 00 9438 550 50 13 227 689 005 0.5253E-02 0.0000E+00 0.9116E+02 • 00 9389 592 49 16 237 812 006 0.5176E-02 0.0000E+00 0.8964E+02 • 00 9329 645 49 24 244 977 007 0.4897E-02 0.0000E+00 0.8455E+02 • 00 9258 708 47 34 248 1086 008 0.4526E-02 0.0000E+00 0.7858E+02 • 00 9175 781 42 39 251 1103 009 0.4238E-02 0.0000E+00 0.7543E+02 • 00 9077 868 35 39 254 1101 010 0.4077E-02 0.0000E+00 0.7571E+02 • .. • .. • 00 62318987 -607 255 305 784 058 0.3190E-05 0.0000E+00 0.1981E+01 • 00 54119854 -629 243 315 647 059 0.3085E-05 0.0000E+00 0.2243E+01 • 00 46420806 -643 239 301 581 060 0.2968E-05 0.0000E+00 0.2239E+01 • 00 39121850 -649 244 292 695 061 0.2914E-05 0.0000E+00 0.1999E+01 • 00 32422992 -645 258 308 433 062 0.2912E-05 0.0000E+00 0.1561E+01 • 25-9-9-9-9-9 063 • H010912040600 53 model gp v-profile

  7. Requirements for windprofiler verification (1) • windprofilers (WP) run in two modes,in Switzerland: • high mode: data from ~200m to ~8000 m above ground, for all 144m • low mode: data from ~100m to ~2500 m above ground, for all 72m • verification for all 30‘ (full hours and half hours) with theWP-data (temporal means of 30‘) at full hours +15‘ and +45‘(WP at full hour +15‘ contains the data of the last 30‘) • Verification on the following z-levels: • high mode: on WP-levels or model-levels • low mode: on WP-levels or model-levels

  8. Windprofiler locations in SwiterlandProject CN-MET Mühleberg (ZES) May-June ‘09 Kleindöttingen (KDT) Aug.-Okt. ‘08 CN-MET upper air networkassimilated in COSMO-2

  9. Requirements for windprofiler verification (2) • Strategy at MeteoSwiss: • Verification with MATLAB (experimental mode) • OBS: BUFR -> conversion to z-levels (within MATLAB) • MOD: GRIB -> l2b profiles for all model-levels -> interpolation to z-levels (within MATLAB) • Suggested strategy for VERSUS: • OBS: read BUFR directly in VERSUS andconversion/vertical interpolation for all verification z-levels,subtract 15‘ to the sounding time for comparison with MOD • MOD: read GRIB (all model levels of U,V,W needed) with fieldextra and produce an output („l2b-format or eventually pseudo-BUFR) with profiles at all WP-gridpoints for all verification z-levels

  10. KDT – High-mode wind direction High-mode Wind direction ff ≥ 3 m/s

  11. ZES – High-mode wind speed

  12. KDT – Low-mode wind speed

  13. Comparison radio sonde Payerne: Bias Profiler Kleindöttingen Radiosonde Payerne Profiler Payerne BiasWind directionff ≥ 3 m/s 0-5°

  14. Comparison radio sonde Payerne: Standard deviation Profiler Kleindöttingen Radiosonde Payerne Profiler Payerne BiasWind directionff ≥ 3 m/s 20-30° 10-15° 20-30°

  15. PAY – High mode wind direction High-mode Wind speed ff ≥ 3 m/s

  16. PAY – High-mode wind speed

  17. PAY – Validation with Radiosounding Wind direction ff ≥ 3 m/s

  18. PAY – Validation with radiosounding

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