Federal Department of Home Affairs FDHAFederal Office of Meteorology and Climatology MeteoSwiss

VERSUS:Requirements for

TEMPs and windprofilers

Francis Schubiger & Christophe HugMeteoSwiss

VERSUS meeting

Langen (D), 4 March 2010

2 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

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 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

TEMPS verification Payerne: Summer 2009 wind speed: forecasts + 24h

COSMO-7

COSMO-2

bias Standarddeviation

4 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

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 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

L2e-format

6 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

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 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

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 the

WP-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 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

CN-MET upper air networkassimilated in COSMO-2

Kleindöttingen (KDT)Aug.-Okt. ‘08

Mühleberg (ZES)May-June ‘09

Windprofiler locations in SwiterlandProject CN-MET

9 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

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 and

conversion/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 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

KDT – High-mode wind direction

High-modeWind direction ff ≥ 3 m/s

High-modeWind direction ff ≥ 3 m/s

11 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

ZES – High-mode wind speed

12 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

KDT – Low-mode wind speed

13 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

BiasWind directionff ≥ 3 m/s

BiasWind directionff ≥ 3 m/s

Comparison radio sonde Payerne: Bias Radiosonde Payerne Profiler Payerne

Profiler Kleindöttingen

0-5°

14 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

Comparison radio sonde Payerne: Standard deviation

10-15° 20-30° 20-30°

Radiosonde Payerne Profiler PayerneProfiler Kleindöttingen

BiasWind directionff ≥ 3 m/s

BiasWind directionff ≥ 3 m/s

15 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

PAY – High mode wind direction

High-modeWind speed ff ≥ 3 m/s

High-modeWind speed ff ≥ 3 m/s

16 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

PAY – High-mode wind speed

17 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

PAY – Validation with RadiosoundingWind directionff ≥ 3 m/s

Wind directionff ≥ 3 m/s

18 VERSUS: Requirements for TEMPs and windprofilersVERSUS meeting, 04.03.2010, Langen (D)

PAY – Validation with radiosounding