Outflow Flight Module Outflow Module Team Jim Doyle

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Outflow Flight Module • Outflow Module Team Jim Doyle, Jon Moskaitis, Peter Black, Leslie

Outflow Flight Module • Outflow Module Team Jim Doyle, Jon Moskaitis, Peter Black, Leslie Lait, Russ Elsberry, Chris Velden • Overall Science Objectives I. Observe and document the tropical cyclone (TC) outflow layer structure (e. g. , depth, lateral and vertical shear, stability etc. ), evolution, and its interaction with inner core convection and the environment. II. Deploy dropsondes in sensitive regions (including the outflow jet) and assess the impact on TC prediction. • Under what conditions would you fly the module? ØStorms with outflow and that are accessible for the GH. ØGeneralized modules have been formulated for small and large storms, and for storms that are interacting with troughs. • Under what conditions would you not fly? What are the guidelines? ØWeak storms or storms in formation that have poorly defined outflow. ØTCs that require long ferries and on-station time is thus limited

Outflow Flight Module • How would you de-scope the plan if the system is

Outflow Flight Module • How would you de-scope the plan if the system is at long range or some other factor(s) limits on-station time? ØOne module could be performed (instead of repeated module) ØPartial lawnmower or linear segment could be performed • Dropsonde plan Ø Higher frequency sondes across regions of interest such as jet cores or the outflow edge. Ø Deploy dropsondes every 1 -2 degrees. Ø Deploy dropsondes near way points where possible Ø Deploy dropsondes in sensitive regions (including the outflow jet) as diagnosed from ensemble or adjoint targeting products. • Modules designed to be repeated twice during a flight 1. Lawnmower - Double lawnmower pattern (for 2 outflow jets) with core transect - Polar coordinate pattern 2. Square Spiral 3. Linear Repeat (Time Evolution- Hovmöller) for fast-moving TC

Outflow Flight Module Design Strategy I. 1. 2. 3. II. 1. 2. 3. 4.

Outflow Flight Module Design Strategy I. 1. 2. 3. II. 1. 2. 3. 4. III. 1. 2. 3. IV. 1. 2. 3. Three basic pattern types Lawnmower Square spiral Linear Repeat (Time Evolution- Hovmöller) Four Basic Orientations Fixed (square) Stretched (rectangular) Rotated (along-feature) Distorted (trapezoidal) Three Outflow Regions Poleward Outflow Jet (POJ) Storm-Centric Outflow (SCO) Equatorward Outflow Jet (EOJ) Three Coordinate Reference Systems Earth-Relative Storm-Relative Feature-Relative Three Flight Module Strategies (standard size) Fly POJ, SCO and EOJ modules twice Fly POJ and SCO once each Fly SCO and EOJ once each

Outflow Dropsonde Deployment Strategy • • • Flight Times Ø Center pattern on T

Outflow Dropsonde Deployment Strategy • • • Flight Times Ø Center pattern on T 0 = 1200 GMT § Block-Out (T. O. -30 min) T 1= 0000 GMT § Block-In (Landing+30 min) T 2= 2400 GMT Ø Center pattern on T 0 = 0000 GMT § Block-Out (T. O. -30 min) T 1= 1200 GMT, day 1 § Block-In (Landing+30 min) T 2= 1200 GMT, day 2 Sonde Spacing/ number of sondes/leg along and across track/ total sondes Ø Small: 0. 5 -1. 0 o lat (30 -60 nm, 55. 5 -111 km)/ e. g. Ø Standard 1. 5 -2. 0 o lat (90 -120 nm, 166. 5 -222 km)/ e. g. 6 x 5 Ø Large 2. 5 -3. 0 o lat (150 -180 nm, 275. 5 -333 km) Ø Ø Input Parameters Storm initial location (lat, lon); forecast speed and direction of motion Feature speed and direction of motion Initial Point, IP (radius, azimuth from initial storm location) Initial heading

Module 1: Lawnmower pattern: Maria (2011) example Flight legs 2º apart, and 30 drops

Module 1: Lawnmower pattern: Maria (2011) example Flight legs 2º apart, and 30 drops in 2ºx 2º grid in this example Repeat pattern and fly home or move on to another objective Black dot: Best-track position Blue line: Flight track Blue dots: Dropsondes

Module 1: Lawnmower pattern: Maria (2011) example A Flight legs 2º apart, and 30

Module 1: Lawnmower pattern: Maria (2011) example A Flight legs 2º apart, and 30 drops in 2ºx 2º grid in this example Repeat pattern and fly home or move on to another objective Options: • Rotate, Stretch/ Compress • Fixed, storm or feature relative • A- go home: 30 sondes • B- Repeat: 60 sondes • C- Fly another feature: 60 sondes Black dot: Best-track position Blue line: Flight track Blue dots: Dropsondes

Module 1: Lawnmower pattern: Maria (2011) example A Flight legs 2º apart, and 30

Module 1: Lawnmower pattern: Maria (2011) example A Flight legs 2º apart, and 30 drops in 2ºx 2º grid in this example B Repeat pattern and fly home or move on to another objective Options: • Rotate, Stretch/ Compress • Fixed, storm or feature relative • A- go home: 30 sondes • B- Repeat: 60 sondes (option: ferry to start pt. over outflow core) • C- Fly another feature: 60 sondes Black dot: Best-track position Blue line: Flight track Blue dots: Dropsondes

Module 1: Lawnmower pattern: Maria (2011) example A Flight legs 2º apart, and 30

Module 1: Lawnmower pattern: Maria (2011) example A Flight legs 2º apart, and 30 drops in 2ºx 2º grid in this example B Repeat pattern and fly home or move on to another objective C Options: • Rotate, Stretch/ Compress • Fixed, storm or feature relative • A- go home: 30 sondes • B- Repeat: 60 sondes • C- Fly another feature: 60 sondes Black dot: Best-track position Blue line: Flight track Blue dots: Dropsondes

Module 1: Lawnmower variant – Polar Coordinate Transform: Earl (2010) Radial legs are evenly

Module 1: Lawnmower variant – Polar Coordinate Transform: Earl (2010) Radial legs are evenly spaced in azimuth and 30 drops in this example Re-center pattern and fly again before returning home Ferry flight segment over land is for illustrative purposes only. Not feasible during experiment. Black dot: Best-track position Blue line: Flight track Blue dots: Dropsondes

Module 1: Lawnmower Variant Igor (2010) example 75 drops in this example Black dot:

Module 1: Lawnmower Variant Igor (2010) example 75 drops in this example Black dot: Best-track position Blue line: Flight track Blue dots: Dropsondes

Module 2: Square spiral pattern: Maria (2011) example Flight legs 2º apart, and 30

Module 2: Square spiral pattern: Maria (2011) example Flight legs 2º apart, and 30 drops in 2ºx 2º grid in this example Repeat pattern and fly home or move on to another objective

Module 2: Square spiral pattern: Maria (2011) example Flight legs 2º apart, and 30

Module 2: Square spiral pattern: Maria (2011) example Flight legs 2º apart, and 30 drops in 2ºx 2º grid in this example Repeat pattern and fly home or move on to another objective A s tive s e a pr rel m re es o d C tu s / on a de s h e tc r f on s 60 e r o : , St rm 30 s nde ure: s o n io tate , sto me: 0 s feat t Op Ro xed ho at: 6 her t Blue dots: Dropsondes e track Fi line: go Flight o p Black dot: Best-track position • Blue • A - Re y an

Module 2: Square spiral pattern: Maria (2011) example Flight legs 2º apart, and 30

Module 2: Square spiral pattern: Maria (2011) example Flight legs 2º apart, and 30 drops in 2ºx 2º grid in this example Repeat pattern and fly home or move on to another objective A B s tive s e a pr rel m re es o d C tu s / on a de s h e tc r f on s 60 e r o : , St rm 30 s nde ure: s o n io tate , sto me: 0 s feat t Op Ro xed ho at: 6 her t Blue dots: Dropsondes e track Fi line: go Flight o p Black dot: Best-track position • Blue • A - Re y an

Module 2: Square spiral pattern: Maria (2011) example Flight legs 2º apart, and 30

Module 2: Square spiral pattern: Maria (2011) example Flight legs 2º apart, and 30 drops in 2ºx 2º grid in this example C Repeat pattern and fly home or move on to another objective B A s tive s e a pr rel m re es o d C tu s / on a de s h e tc r f on s 60 e r o : , St rm 30 s nde ure: s o n io tate , sto me: 0 s feat t Op Ro xed ho at: 6 her t Blue dots: Dropsondes e track Fi line: go Flight o p Black dot: Best-track position • Blue • A - Re y an

Module 3: Linear Repeat: Danielle (2010) example Ferry to 35ºN and travel back and

Module 3: Linear Repeat: Danielle (2010) example Ferry to 35ºN and travel back and forth as many times as desired, while storm translates rapidly northeast Combine with extratropical transition objective Time Evolution- Hovmöller Black dot: Best-track position Blue line: Flight track Blue dots: Dropsondes

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