1 / 15

Convective Structure in Relation to Shear

Convective Structure in Relation to Shear. Robert A. Houze , Jennifer C. DeHart , & Deanna A. Hence University of Washington. NASA GRIP & HS3 Hurricane Meetings, Wallops Island, VA, 7-10 May 2012. Hence and Houze (2011,2012a,b) have analyzed TRMM PR data. Snapshots of radar reflectivity

kato
Download Presentation

Convective Structure in Relation to Shear

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Convective Structure in Relation to Shear Robert A. Houze, Jennifer C. DeHart,& Deanna A. Hence University of Washington NASA GRIP & HS3 Hurricane Meetings, Wallops Island, VA, 7-10 May 2012

  2. Hence and Houze (2011,2012a,b) have analyzed TRMM PR data • Snapshots of radar reflectivity • 10+ years of data • Contoured by Frequency Altitude Diagrams (CFADs) • Found evidence of systematic evolution of convective development around the storm • Relative the the 200-850 hPa shear vector

  3. TRMM

  4. Hence and Houze 2011

  5. DL DR 8 Shear 6 2 Height (km) UL UR 8 6 2 30 40 30 40 Courtesy of D. Hence Reflectivity (dBZ)

  6. Hurricane Katrina – 8/28/2005

  7. Shear

  8. NOAA P3 Flights in Hurricane Earl

  9. Hurricane Earl AFTER RI 8/30/2010 N43, 2100-2330Z

  10. DL DR Shear Earl after RI UL UR

  11. Hurricane Earl DURING RI 8/30/2010 NPAA 42, 1100-1400 UTC

  12. DL DR Shear Earl during RI UL UR

  13. Conclusions • Had to use NOAA P3 radar data to get enough statistics • TRMM shows convective generation in downshear right and lifecycle behavior in the subsequent quadrants • Katrina looks generally consistent with the TRMM statistics. • When Earl was rapidly intensifying the pattern shifted by one quadrant—is this significant?

  14. EndThis research was supported by NSF grant # ATM-0743180 and NASA grant #NNX09AM73G

More Related