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Winter-time wind verification of HIRLAM in Sodankylä Priit Tisler, UH/FMI

Winter-time wind verification of HIRLAM in Sodankylä Priit Tisler, UH/FMI. Working meeting on Stable Boundary Layer Parameterizations 2 November 2005 HIRLAM - NetFAM. Objectives. Wind speed, direction and veering in ABL Impact of horizontal resolution of HIRLAM

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Winter-time wind verification of HIRLAM in Sodankylä Priit Tisler, UH/FMI

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  1. Winter-time wind verification of HIRLAM in SodankyläPriit Tisler, UH/FMI Working meeting on Stable Boundary Layer Parameterizations2 November 2005 HIRLAM - NetFAM

  2. Objectives • Wind speed, direction and veering in ABL • Impact of horizontal resolution of HIRLAM • Impact of model code improvements • Surface stress turning etc. (Newsletter No.47) • Traditional verification, HIRLAM vs. measurements (Sodankylä)

  3. Model data

  4. Details of used meteorological data • Period of interest 4 months, (nov.04 – feb.05) • Except experimental RCRA 2 months, (dec.04, jan.05) • HIRLAM 6 h forecasts, int. 6h • Sodankylä soundings, int.12h • Sodankylä AWS data, int. 6h

  5. Wind speed at lev40

  6. Wind speed at lev40

  7. Wind speed at 10 m

  8. Wind speed at 10 m

  9. Wind direction at lev40

  10. Wind direction at lev40

  11. Wind direction at lev30 (~850 hPa)

  12. Wind veering, ulev40 > 5m/s

  13. Wind veering, ulev40 > 5m/s

  14. Wind direction, lev40 vs. AWS

  15. Wind direction, lev40 vs. AWS

  16. Wind veering

  17. Wind veering

  18. Wind veering, uAWS > 5m/s

  19. Summaryforecast for winter period 05/06 • Grid spacing – small effect

  20. Summaryforecast for winter period 05/06 • Grid spacing – small effect • New RCR (RCRA), Finland (inland) • increased 10m (also lowest level) wind speed • reduced bias (positive) of 10m wind direction • increased wind turning in ABL

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