Tropical Cyclone Structure - 2008. I: Tropical Cyclone Formation. II: Tropical Cyclone Intensification. III: Tropical Cyclone Structure Change. Acknowledgments: Office of Naval Research, Marine Meteorology National Science Foundation, Large-Scale Dynamics
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Tropical Cyclone Structure - 2008
I: Tropical Cyclone Formation
II: Tropical Cyclone
III: Tropical Cyclone
Acknowledgments: Office of Naval Research, Marine Meteorology
National Science Foundation, Large-Scale Dynamics
USAF, 13th AF
Key science questions to be addressed in a program aimed at increased understanding and predictability of tropical cyclone characteristics during formation, intensification, and recurvature over the western North Pacific
Pre-TY Tokage monsoon depression
TY Tokage 0000 UTC 14 October 2004
Warning graphics from the Joint Typhoon Warning Center for TY Tokage. The shaded region defines the danger area to be avoided. This area is based on the uncertainty associated with track and outer wind structure over the ensuing five days.
The danger area nearly covers the entire East China Sea for a period of at least 5 days.
The change in track forecast from straight to recurvature, which may be due to the influence of the outer wind structure
TY Tokage: 0000 UTC 14 October 2004
TY Tokage: 1200 UTC 15 October 2004
What are the relative roles of the primary mesoscale mechanisms (bottom-up and top-down) in determining the location, timing, and rate of tropical cyclone formation in the monsoon trough environment of the tropical western North Pacific?
Pre-Fitow (10W 2007) disturbance Pre-Man-Yi (04W 2007) disturbance
Objective: Increased predictability associated with the location, timing, and rate of tropical cyclone formation over the western North Pacific
What are the relative roles of environmentally-induced and vortex-generated mechanisms versus cyclogenesis-determined initial conditions in determining the outer wind structural evolution of western North Pacific tropical cyclones?
Large Tropical Cyclones
Large and Small
Small Tropical Cyclones
Objective: Increased understanding and predictability of factors that impact the evolution of the outer-wind structure of an intensifying tropical cyclone over the western North Pacific.
NOAA 43 1430-1520Z 10,000’
TMI 85H 9-22-05 1443Z
Graphic supplied by J. Hawkins
VALIDATION OF SATELLITE ALGORITHMS
WESTERN NORTH PACIFIC TROPICAL CYCLONE STRUCTURE AND STRUCTURE CHANGE INCLUDING INTENSITY CHANGE
AF C-130 STEPPED FREQUENCY MICROWAVE RADIOMETER (SFMR) AND DROPWINDSONDES AT ALL STAGES FROM FORMATION TO EXTRATROPICAL TRANSITION IN COOPERATION WITH T-PARC
DOPPLER WIND LIDAR ON NRL P-3VERTICAL PROFILES OF WIND VECTORS TO THE SURFACE (CROSS-CALIBRATION WITH C-130 SFMR) IN CLOUD-FREE SCENES – FIRST TIME IN TROPICAL CYCLONE
COHERENT WIND STRUCTURES IN BOUNDARY LAYER OVER OCEAN IN TROPICAL CYCLONES (Emmitt and Foster)
Pre- TY 10W (Fitow) Disturbance
Combined missions during tropical cyclone formation
Use of Eldora to measure characteristics associated with deep convection
Use of WC-130 to measure the environmental characteristics
Tropical Storm WC-130J Survey:
PA~300-700 mb, IAS~280-240 kt
(280 kt transit)
Leg radii~110 nm
9.5 hr duration
1.5 hr creep/day
7 sondes per leg +3 = 24 total
(eyewall multi-sonde ~5 per leg
= +15; 39 total)
7 AXBTs per leg +2 diagonals x4 = 29 total
1944 UTC 10 July 2007
TMI 85 GhZ H