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Analyses of hurricane outflow layer structure u sing dropsonde observations deployed from a NASA Global Hawk AUV during HS3. Peter G. Black 1 , Jon Moskaitis 2 , James Doyle 2 , Chris Velden 3 and Scott Braun 4
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using dropsonde observations
deployed from a NASA Global Hawk AUV
Peter G. Black1,
Jon Moskaitis2, James Doyle2, Chris Velden3 and Scott Braun4
(With special thanks to Michael Black, NOAA/AOML/HRD for sonde processing)
1Naval Research Laboratory and SAIC, Inc., Monterey, CA
2Naval Research Laboratory, Monterey, CA
3U. Wisconsin/ Cooperative Institute for Meteorological Satellite Studies, Madison, WI
4NASA Goddard Space Flight Center, Greenbelt, MD
2) WC-130Js to observe the inflow layer structure and intensity
Secondary Circulation: IN, UP & OUT
Background schematic courtesy of NASA
Strategy:i) Global Hawks to observe the outflow layer and environment
ii) WC-130J to observe inflow layer and inner-core intensity
HYPOTHESIS: There is a characteristic evolution of the outflow as the storm interacts with the environment that corresponds to changes in intensity and structure.
Phase I- TC development
Phase II- RI
Phase III- Mature & decay
Divergent outflow jets resulting from environmental interaction
force inner-core convection?
Nadine (14-15 Sept, 2012):
Outflow forced by Supercell Convection?
of Leslie and Nadine
NASA HS3 Global Hawk Flight Tracks
Nadine: 11 Sep – 04 Oct 2012
No. reporting = 283
7 Sep 2012
Black, Red, Blue and Pink lines:
Global Hawk observed
wind speed and
along jet maximum
Green line: COAMPS-TC model
wind speed profile
Red line: Satellite wind speed
Dashed: Cirrus top / jet max
Dotted: Cirrus cloud base
Yellow shading: Cloud Physics
Lidar (CPL) domain
Total Wind Speed
Isotachs every 2.5 m/s
Cloud Physics LIDAR (CPL): Outflow layer cloud image
CIMSS shear: 0-20 kt
SHIPS/CIRA shear: 0-50 kt
SHIPS/CIRA SST: 20-30 C
RSS MW-OI SST: 20-30 C
GH AV-6 Flight
Outflow jet in Nadine, 14-15 Sept, sampled by multiple dropsondes (triangles- left)
Supercell forced by
as a result of
wind at sonde location.
10/27/06z: Sandy intensity = 60 kt
10/29/12z: Sandy intensity = 80 kt
Recommendations and Future Plans
Outflow Jet Fan pattern