Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and...
-
date post
19-Dec-2015 -
Category
Documents
-
view
220 -
download
3
Transcript of Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and...
![Page 1: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/1.jpg)
Vorticity Structures AccompanyingVorticity Structures AccompanyingEyewall Replacement in Hurricane Rita (2005)Eyewall Replacement in Hurricane Rita (2005)
R.A. Houze, Jr., and B.F. SmullR.A. Houze, Jr., and B.F. SmullDepartment of Atmospheric SciencesDepartment of Atmospheric Sciences
University of WashingtonUniversity of Washington
AMS 28th Conf. on Hurricanes & Tropical MeteorologyAMS 28th Conf. on Hurricanes & Tropical MeteorologyOrlando, Florida - 29 April 2007Orlando, Florida - 29 April 2007
Photo within Rita (CAT 4-->5) on 21 Sept 2005 courtesy M. Black, Photo within Rita (CAT 4-->5) on 21 Sept 2005 courtesy M. Black, NOAA/AOML/HRDNOAA/AOML/HRD
![Page 2: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/2.jpg)
Multi-day Intensity Trends for Hurricane Rita
Period of ELDORA Observations DocumentingConcentric Eyewall Structure on 22 September 2005
Best-track Central Pressure & Max Sustained Surface Winds
![Page 3: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/3.jpg)
22 September 2005 - GOES Visible + P-3 TracksEyewall Replacement Phase
![Page 4: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/4.jpg)
M a toen do ac r ySarymirP
Concentric Eyewall Reflectivity Structure2.0 km MSL
1801-1820 UTC NRL P-3/ELDORA Circumnavigation (Units: dBZ)
![Page 5: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/5.jpg)
Double Wind Maximum - Horizontal Wind Speed2.5 km MSL
1801-1820 UTC NRL P-3/ELDORA Circumnavigation (Units: m/s)
M a toen do ac r ySarymirP
![Page 6: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/6.jpg)
Double Wind Maximum - Horizontal Wind Speed0.5 km MSL
1801-1820 UTC NRL P-3/ELDORA Circumnavigation(Units: m/s)
M a toen do ac r ySarymirP
![Page 7: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/7.jpg)
Patterns of Vertical VorticityAccompanying Eyewall Replacement
Patterns of Vertical VorticityAccompanying Eyewall Replacement
![Page 8: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/8.jpg)
~Axisymmetrized Primary Eyewall vs. High Wavenumber Secondary Eyewall Structures
NW Quadrant80 x 80 km2
SE Quadrant80 x 80 km2
Location of NW & SE Quadrant Analysis Domains( Units: 10-4 s-1)
![Page 9: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/9.jpg)
W E
NW Quadrant
NW Quadrant Vorticity - 1.25 km MSL Contrasting scale/orientation of primary vs. secondary eyewall
Vorticity features
Evidence of vorticity dipoles in Evidence of vorticity dipoles in region of secondary eyewall region of secondary eyewall
formation formation
Evidence of vorticity dipoles in Evidence of vorticity dipoles in region of secondary eyewall region of secondary eyewall
formation formation
( Units: 10-4 s-1)Marks and Houze 1983
![Page 10: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/10.jpg)
WE
Eye Moat
NW QuadrantRadial Section
Radial Section - Reflectivity: Vertically coherent concentric eyewall/moat structure -
Contrasting depth/tilt of primary & secondary eyewall features
(Units: dBZ)
![Page 11: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/11.jpg)
WE
Radial Section - Horizontal Wind Speed Contrasting depth/slope of isotach patterns -
Comparatively shallow, sloped secondary eyewall wind maxima
Eye Moat
NW QuadrantRadial Section
(Units: m/s)
![Page 12: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/12.jpg)
WE
Radial Section - Vertical Vorticity Corresponding contrasts in primary vs. secondary eyewall Tremendous vertical coherence of secondary eyewall dipoles
Eye Moat
NW QuadrantRadial Section
( Units: 10-4 s-1)
![Page 13: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/13.jpg)
WE
Radial Section - Vertical Vorticity& Doppler-Derived Air Motion Vectors
Tendency for & w to be correlated
Eye Moat
NW QuadrantRadial Section
( Units: 10-4 s-1)
![Page 14: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/14.jpg)
Reproducibility of Observed StructuresIn Other Quadrants
Reproducibility of Observed StructuresIn Other Quadrants
![Page 15: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/15.jpg)
Vertical Vorticity - 2.0 km MSLRadial section crosses intense primary eyewall mesovortex &
high wavenumber secondary eyewall features beyond
WSW
ENE
(Units: 10-4 s-1)
![Page 16: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/16.jpg)
Radial Section - Vertical Vorticity
ENEWSW
Eye
SE Quadrant Radial Section
( Units: 10-4 s-1)
![Page 17: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/17.jpg)
Tangential Section Vorticity @ 2.0 km - Evidence of high wavenumber structures
SW
NE
( Units: 10-4 s-1)
![Page 18: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/18.jpg)
Corresponding Tilted VorticityStructures Structures within Secondary Eyewall
NESW
x x x x x
(Units: 10-4 s-1)SE Quadrant Tangential Section
FlowShear
![Page 19: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/19.jpg)
Wind Speed in Secondary Eyewall Near-sfc wind maxima at ~5 km spacing
Structures within elevated (2-5 km) layer tilt downshear
x x x x x
(Units: m/s)SE Quadrant Tangential Section
Shear
NESW
![Page 20: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/20.jpg)
Conclusions
•Unprecedented high-resolution view of concentric eyewall structure & dynamics
•Primary eyewall “triangular” with upright local vorticity maxima
•Secondary eyewall
High wavenumber (~25) wind perturbationsWind max strong but shallow & slopedHigh wavenumber vorticity extrema
Tilt radially outward and tangentially downshearTend to correlate with wPossibly associated with near-surface wind maxima
![Page 21: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/21.jpg)
Thanks for your attention…Thanks for your attention…
![Page 22: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/22.jpg)
21 Sept 2005 - GOES Visible + P-3 Tracks
![Page 23: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/23.jpg)
21 Sept 2005 - LF/WSR-88D CompositeIntense Cat-5 Phase
![Page 24: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/24.jpg)
22 September 2005 - GOES Visible + P-3 TracksEyewall Replacement Phase
![Page 25: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/25.jpg)
23 Sept 2005 - WSR-88D Composite + TracksStrongly-sheared Landfall Phase
![Page 26: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/26.jpg)
Mesovortex along Primary Eyewall of Rita Associated Reflectivity @ 0.5 km MSL
(Units: dBZ)
![Page 27: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/27.jpg)
Mesovortex along Primary Eyewall of Rita Wind Speed @ 0.5 km MSL
(Units: m/s)
![Page 28: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/28.jpg)
Mesovortex Along Primary Eyewall of Rita Vertical Vorticity @ 0.5 km MSL
(Units: 10-4 s-1)
![Page 29: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/29.jpg)
3-D Exploration of Mesovortex Structure Map @ 0.5 km MSL & Radial Cross Section)
dBZdBZVorticity (Vorticity ())
( Units: 10-4 s-1)
![Page 30: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/30.jpg)
Possible Convective Origins Suggested byAccompanying Precipitation Structures
x x x x x
(Units: dBZ)SE Quadrant Tangential Section
![Page 31: Vorticity Structures Accompanying Eyewall Replacement in Hurricane Rita (2005) R.A. Houze, Jr., and B.F. Smull Department of Atmospheric Sciences University.](https://reader035.fdocuments.net/reader035/viewer/2022062516/56649d3a5503460f94a1499c/html5/thumbnails/31.jpg)
Radial Section - Reflectivity
ENEWSW
Eye Moat
SE Quadrant Radial Section
(Units: dBZ)