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Joint OSSE experiment - Conventional data

A joint OSSE experiment using conventional data to compare wind and temperature at various pressure levels. Initial results show promising impact on wind and temperature, with further analysis to be conducted. Suitable for running through the whole year with conventional observations generated for May 2005-2006.

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Joint OSSE experiment - Conventional data

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  1. Joint OSSE experiment- Conventional data Yuanfu Xie, Jack Woollen Michiko Masutani, Yucheng Song Daryl Kleist

  2. Conventional data OSSE test • Jack generated the conventional obs using the new EC nature run; • This OSSE is tested for the time period of May 1-8, 2005; • T62L64 is used in the experiment; • NCEP SST and ICE analysis are used, interestingly, snow does not seems necessary.

  3. Initial results • Some temperature ingest problem was found and Daryl fixed the routine for temperature (sensible/virtual temperature); • Wind and temperature are examined; • Comparison of NR, NO (no observation), and CO (conventional observation) runs.

  4. Data ingest by prepqc • sst: 0; • spd: 17,835; • q: 64,458; • t: 48,104; • uv: 477,874; • pw: 0; • ps: 53,574

  5. Time sequence of RMS and mean at 500mb (wind)red: NR-NO; green: NR-CO

  6. Time sequence of RMS and mean at 200, 500, and 850mb (temp)

  7. Wind (U) comparison (700mb)at 12Z May 8, 2005 OSSE without obs ECWMF nature run

  8. Wind (U) comparison (700mb)at 12Z May 8, 2005 ECWMF nature run OSSE with convention obs

  9. Wind (U) differences (700mb)at 12Z May 8, 2005 NR-NO NR-CO

  10. OSSE wind (U) impact: CO-NO (700mb)at 12Z May 8, 2005

  11. Temperature comparison (700mb)at 12Z May 8, 2005 OSSE without obs ECWMF nature run

  12. Temperature comparison (700mb)at 12Z May 8, 2005 ECWMF nature run OSSE with convention obs

  13. Temperature differences (700mb)at 12Z May 8, 2005 NR-NO NR-CO

  14. OSSE Temp impact: CO-NO (700mb)at 12Z May 8, 2005

  15. RMS average over time (wind)

  16. RMS average over time (temp)

  17. Remarks • Wind has the most observations; • OSSE impact (conventional obs) on wind and temperature seems good; • Other field will be also examined; • With conventional observations generated for May 2005-2006, this OSSE can be run through the whole year.

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