Meso-α: Easterly wave critical layer Isolated recirculation regions Inertia gravity waves
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Meso-α: Easterly wave critical layer Isolated recirculation regions Inertia gravity waves 200 – 2,000 km 1 Consideration of horizontal scales exposes the challenging nature of the problem Meso-γ: VHTs, Congestus, Precip. Driven downdrafts, Gust fronts 2 – 20 km Synoptic Easterly Waves Hydro instability of ITCZ Subtropical intrusions 2,000 – 8,000 km Meso-β: TC, MCS, gravity waves 20 – 200 km ln E ln k Downscal e Enstroph y Cascade Upscale Energy Cascade
description
Consideration of horizontal scales exposes the challenging nature of the problem. ln E. Downscale Enstrophy Cascade. Meso-β: TC, MCS, gravity waves 20 – 200 km. Upscale Energy Cascade. ln k. Synoptic Easterly Waves Hydro instability of ITCZ Subtropical intrusions 2,000 – 8,000 km. - PowerPoint PPT Presentation
Transcript of Meso-α: Easterly wave critical layer Isolated recirculation regions Inertia gravity waves
Meso-α:Easterly wave critical layer Isolated recirculation regionsInertia gravity waves 200 – 2,000 km
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Consideration of horizontal scales exposes thechallenging nature of the problem
Meso-γ:VHTs, Congestus, Precip. Driven downdrafts, Gust fronts2 – 20 km
SynopticEasterly WavesHydro instability of ITCZSubtropical intrusions2,000 – 8,000 km
Meso-β:TC, MCS, gravity waves 20 – 200 km
ln E
ln k
Downscale Enstrophy Cascade
Upscale Energy Cascade
Wave-Pouch Tracking Methodology
• Front page imagery– Methodology for determining initial position
• Phase speed determination– Zonal method (RH & v)– Oblique method
• Track creation– Methodology for determining level
• Meso- diagnostics– Zeta, OW, RH, Vertical Shear
• Satellite/analysis (over to LeeJoice)
Nondevelopers Developers
Wave-ITCZ Interaction
Diabatically
activated?
SAL / mid-level dry air:
Killed or Survived?
No pouch
Shallow pouch above PBL
Shallow pouch within PBL
Deep pouch
Shallow pouch
Deep pouch
Intensified on ITCZ
Excited new
waves
97L
PG01L X No No No NA
PG02L NoMaybe. SAL
to east
PG03L XMaybe.
In SAL
PG04L XMaybe.
In SAL
PG05L X
PG06L XMaybe.
In SAL
2009 GRIP / PREDICT Dry Run Summary
Nondevelopers Developers
Wave-ITCZ Interaction
Diabatically
activated?
SAL / mid-level dry air:
Killed or Survived?
No pouch
Shallow pouch above PBL
Shallow pouch within PBL
Deep pouch
Shallow pouch
Deep pouch
Intensified on ITCZ
Excited new
waves
PG07L
PG08L X
PG09L
PG10LClaudette
PG11L
Ana
PG12L
BillX X
PG13L
2009 GRIP / PREDICT Dry Run Summary
Nondevelopers Developers
Wave-ITCZ Interaction
Diabatically
activated?
SAL / mid-level dry air:
Killed or Survived?
No pouch
Shallow pouch above PBL
Shallow pouch within PBL
Deep pouch
Shallow pouch
Deep pouch
Intensified on ITCZ
Excited new
waves
PG14L
PG15L X
PG16L
PG17L
Danny
PG18L
PG19L
PG20L
ErikaX
2009 GRIP / PREDICT Dry Run Summary
Nondevelopers Developers
Wave-ITCZ Interaction
Diabatically
activated?
SAL / mid-level dry air:
Killed or Survived?
No pouch
Shallow pouch above PBL
Shallow pouch within PBL
Deep pouch
Shallow pouch
Deep pouch
Intensified on ITCZ
Excited new
waves
PG21L
PG22L
PG23L
PG24LX
Shear
PG25L
FredX
PG26L X Killed
PG27L
2009 GRIP / PREDICT Dry Run Summary
Nondevelopers Developers
Wave-ITCZ Interaction
Diabatically
activated?
SAL / mid-level dry air:
Killed or Survived?
No pouch
Shallow pouch above PBL
Shallow pouch within PBL
Deep pouch
Shallow pouch
Deep pouch
Intensified on ITCZ
Excited new
waves
PG28L
PG29L
TD08L
PG30L
PG31L
PG32L
Henri
PG33L
2009 GRIP / PREDICT Dry Run Summary
New Diagnostics Wish List
• ‘Diabatic Activation’ (i.e., persistent convective activity). Use visible/infrared/microwave satellite imagery
• Warm & dry air from middle level tropical atmosphere or African continent (SAL products, real time ? …)
• Trade wind inversion (real time)• CAPE (real time)• CIN (real time)
![TC ATUC 04 08.ppt [Kompatibilitätsmodus] · Internal Recirculation (IRC) Available on TCA/TCRAvailable on TCA/TCR Ιντερναλ φλοω ρεχιρχυλατιον σηιφτινγ](https://static.fdocument.org/doc/165x107/5ae59b8e7f8b9acc268c3d97/tc-atuc-04-08ppt-kompatibilittsmodus-recirculation-irc-available-on-tcatcravailable.jpg)
