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HRD Science Meeting Aug. 13, 2009

HRD Science Meeting Aug. 13, 2009. Chris Sisko (NWS/NHC). HRD Science Meeting (Aug 13, 2009) – mini brief Chris Sisko (NWS/NHC). Discussion Topic: Can we leverage the new weather system tool “AWIPS-2” in a research environment? So what is this AWIPS-2 thing?

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HRD Science Meeting Aug. 13, 2009

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  1. HRD Science MeetingAug. 13, 2009 Chris Sisko (NWS/NHC)

  2. HRD Science Meeting (Aug 13, 2009) – mini briefChris Sisko (NWS/NHC) Discussion Topic: Can we leverage the new weather system tool “AWIPS-2” in a research environment? So what is this AWIPS-2 thing? Essentially a re-factor of NWS’s AWIPS system – prime contractor is Raytheon. Uses Service Orientated Architecture (SOA) paradigm – predicated on web services and is supposedly change friendly. Utilizes over 20 open source projects which are easily inter-changeable if necessary. Data is handled as a “plug-in” - dataflow can be either pushed or pulled. The display interface looks the same as AWIPS, but the internals are completely different (Java and Python).

  3. AWIPS-2 (running real-time at NHC) Release: T.O. 10

  4. NAWIPS-2 Perspective (running real-time at NHC) Release: T.O. 10 Base / NAWIPS-2 RC 2

  5. Last update: 10-Aug-2009 (CAS)

  6. HRD Science Meeting (Aug 13, 2009) – mini brief Questions: Is it a viable option for map discussion purposes? Can it be used to transition either new science or new applications into operational environments? Are there any other benefits that HRD can gain from using AWIPS-2? Objective: Develop a planning document that outlines a pathway for researchers to potentially use AWIPS-2 – costs, expected benefits, challenges, etc.

  7. HRD Science MeetingAug. 13, 2009 Zachary Gruskin

  8. TRMM PR RZ Mean Comparisons -- Zachary Gruskin ATL 1-2 (73) ATL 3-5 (43) WPAC 1-2 (142) WPAC 3-5 (95)

  9. TS and Cat 1, ATL, EPAC, and WPAC composite RI (26) SS (64) RW (25)

  10. Things I’ll Be Working on • RMR Statistics • Peak reflectivity statistics (convective burst) • Reflectivity coverage by radius • CFADs for various regions of the cyclone

  11. HRD Science MeetingAug. 13, 2009 Evan Kalina

  12. The Effect of SST Gradients on the Sea-Air Contrast in Tropical Cyclones Dr. Joseph Cione Reynolds and Smith 1 °C SST Climatology for August (1950-1979) West of Baja California, ~6 °C decrease in SST over 10° of latitude Mean SST – TA10 in TC Core is 2.7 °C

  13. The Effect of SST Gradients on the Sea-Air Contrast in Tropical Cyclones Dr. Joseph Cione Reynolds and Smith 1 °C SST Climatology for August (1950-1979) No meridional SST gradient west of 40° W in the Tropical Atlantic Mean SST – TA10 in TC Core is 2.3 °C

  14. dTCore = SSTCore – TA10Core 1989-2008 In the EPAC, sharp SST gradients drive a quick reduction in SAC with latitude. dTCore decreases ~0.25 °C per degree of latitude.

  15. dQCore = QSSTCore – QA10Core 1989-2008 In the EPAC, sharp SST gradients drive a quick reduction in SAC with latitude. dQCore decreases ~0.33 g/kg per degree of latitude.

  16. dTCore = SSTCore – TA10Core 1989-2008 Due to lack of SST gradients, TCs at low latitudes in the ATL exhibit lower SAC, which decreases much more slowly with northward extent than in the EPAC. Decrease = ~0.1 °C/lat (ATL), ~0.25 °C/lat (EPAC)

  17. dQCore = QSSTCore – QA10Core 1989-2008 Due to lack of SST gradients, TCs at low latitudes in the ATL exhibit lower SAC, which decreases much more slowly with northward extent than in the EPAC. Decrease = ~0.1 g/kg/lat (ATL), ~0.33 g/kg/lat (EPAC)

  18. The SST gradients allow tropical cyclones to maintain themselves over sub-26 degree Celsius water in the E. Pacific via advection of air cooler than the SST into the TC center. The plot shows tropical storms and hurricanes west of 110W that undergo a non-negative 24-hour intensity change. 23 out of 252 cases (~9%) maintain or strengthen over sub-26 °C water.

  19. The SST gradients allow tropical cyclones to maintain themselves over sub-26 degree Celsius water in the E. Pacific via advection of air cooler than the SST into the TC center. The plot shows tropical storms and hurricanes west of 110W that undergo a non-negative 24-hour intensity change. 1 out of 252 cases (<<1%) maintain or strengthen when SAC < 0 °C.

  20. HRD Science MeetingAug. 13, 2009 Jun Zhang

  21. Turbulent Kinetic Energy Budget I II III IV V TKE: I : Shear production II: Buoyancy III: Turbulent transport IV: Pressure transport V: Rate of dissipation Zhang, Drennan, Black, and French, 2009: Turbulence structure of the hurricane boundary layer between the outer rainbands. Journal of atmospheric science, 66, 2455-2467.

  22. TKE Budget Lenschow et al. (1980) Nicholls (1985)

  23. Boundary layer characteristic height scales

  24. HRD Science MeetingAug. 13, 2009 Nicholas Carrasco

  25. Trac/Wiki and IRC(xchat) for HRD https://storm.aoml.noaa.gov/projects

  26. Trac Pages

  27. Wiki

  28. Tickets

  29. ch@tHRD IRC (xchat)

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