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Accomplishments on GOES sounding improvements (Jun Li et al., CIMSS)

Accomplishments on GOES sounding improvements (Jun Li et al., CIMSS). Clear sky SFOV sounding algorithm is improved, total precipitable water (TPW) is improved by 0.4 mm (rmse) over the legacy product; new algorithm and codes are ready for operational implementation;

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Accomplishments on GOES sounding improvements (Jun Li et al., CIMSS)

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  1. Accomplishments on GOES sounding improvements(Jun Li et al., CIMSS) • Clear sky SFOV sounding algorithm is improved, total precipitable water (TPW) is improved by 0.4 mm (rmse) over the legacy product; new algorithm and codes are ready for operational implementation; • GOES Sounder total column ozone (TCO) research product is being processed in near real time for research community. GOES TCO has the precision of approximately 4% when compared with Ozone Monitoring Instrument (OMI); • The improved GOES Sounder lifted index (LI) product has shown very important nowcasting information for severe storms, while the forecast did not reflect this needed information; • Collaborated with EUMETSAT scientists, EUMETSAT nowcasting SAF now decides to use CIMSS improved GOES sounding algorithm to replace their operational algorithm (Neural Network) for SEVIRI process; • The developed new algorithm and software have been delivered to Rodrigo Souza of Instituto de Pesquisas Espaciais (INPE, Brazil) for GOES-10 Sounder process, as part of the GEOSS-America’s capacity building, the software works well according to their report.

  2. Validation with ARM site measurements Legacy New (Guess is reg) New (Guess is fcst) Improved sounding retrievals give reasonable accuracy when compare with three years’ microwave radiometer TPW measurements. Forecast bias =-0.4553 RMSe=2.7959 Legacy retrieval New retrieval

  3. Air mass tracking 22 UTC, 13 April 2006 Clustering using 15 Sounder radiances Dry air Conditionally Unstable Super Cell GOES Sounder retrieved RH Potentially convective unstable

  4. Air mass tracking 22 UTC, 13 April 2006 Clustering using 15 Sounder radiances Dry air Conditionally Unstable Super Cell GOES Sounder retrieved RH

  5. Air mass tracking 03 UTC Dry air Super Cell GOES Sounder retrieved RH

  6. Forecast LI GOES Sounder LI 19 UTC on 24 April 2007 GOES-12 Sounder data application on Texas severe storm (24 April 2007) case

  7. Forecast LI GOES Sounder LI 20 UTC on 24 April 2007

  8. Forecast LI GOES Sounder LI 21 UTC on 24 April 2007

  9. Forecast LI GOES Sounder LI Tornadothat killed 10 and injured 120 persons in the Eagle Pass, Texas area 22 UTC on 24 April 2007

  10. Forecast does not provided needed LI information for nowcasting in this case. GOES Sounder provides useful LI information but only in clear skies. Need LI in both clear and cloudy skies !

  11. OMI and GOES 12 (12 Feb 2006) GOES ozone and OMI agree very well (Li et al. 2007, GRL) Hourly TCO product is available for applications

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