Re: Great Warm-Core Inversion with Anti-Cyclone Overhead
Posted by
JAC on 6/26/2009, 12:15 pm
In both graphs, the left axis is where AMSU analysis places the Center-of-Circulation (COC). The horizontal axis is the distance from the COC. Altitude is plotted on the vertical axis.
I am waiting on CIMSS to show an actual long & t of where AMSU places the COC. I'll post that when it comes up.
The first graph comes from microwave soundings and plots temperature difference relative to the surrounding atmosphere as a function of altitude and distance from the COC.
A TC has a well defined temperature core-structure. Dr Gray did a lot of pioneering work on this and I'll try and cite some papers later.
Anywho, a core that has temps below ambient at low altitudes and temps above ambient at mid altitudes is by definition an inversion and shows the health of a TC. That inversion is what a TC needs to develop and strenghten. If the inversion is lacking and the mid-level warm-core temps are low, it has a hard time.
The other sign of health of a TC is if it can vent to the UL atmosphere (tropopause).
That is shown in the second graph. Here wind speed and direction are plotted relative to the COC and as a function of distance and altitude. Solid lines indicate cyclonic flow around the COC and dashed lines indicate anti-cyclonic flow around the COC. You want to see an anti-cyclone in the high altitudes for the TC to vent well. The numbers on each line indicate the realtive wind speed to the COC.
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In this thread:
Models on a possible GOM System next week -
JAC,
6/26/2009, 8:02 am- Anti-cyclone reformed to the SE, Circulation at top of Boundary Layer - JAC, 6/27/2009, 1:52 am
- GFDL & HWRF - JAC, 6/26/2009, 8:04 pm
- UL Winds pushing convection SE of LLC - JAC, 6/26/2009, 6:02 pm
- Re: Models on a possible GOM System next week - Hurricane Ranger, 6/26/2009, 5:03 pm
- Re: Models on a possible GOM System next week - rbc, 6/26/2009, 4:34 pm
- LLC Analysis just in - looks good - closed off - JAC, 6/26/2009, 3:15 pm
- Re: Models on a possible GOM System next week - BobbiStorm, 6/26/2009, 2:53 pm
- Kicked up a notch - ORANGE BOX - JAC, 6/26/2009, 1:56 pm
- Early Guidance is cutting it close - JAC, 6/26/2009, 12:37 pm
- Loop-current warmer than usual for this time of year - JAC, 6/26/2009, 10:44 am
- ULL to the NW at 20N 89W - JAC, 6/26/2009, 10:00 am
- 93L - JAC, 6/26/2009, 8:38 am
- Winds shifting around - JAC, 6/26/2009, 1:06 pm
- Well stacked - JAC, 6/26/2009, 12:58 pm
- Great Warm-Core Inversion with Anti-Cyclone Overhead - JAC, 6/26/2009, 11:07 am
- SCATs - JAC, 6/26/2009, 9:02 am
- Yucatan Buoy Watch - JAC, 6/26/2009, 8:48 am
- Cu-tops at 55K-ft - JAC, 6/26/2009, 8:44 am
- Forecast Air Conditions - JAC, 6/26/2009, 8:32 am
- Don't even think about a landfall target yet - JAC, 6/26/2009, 8:10 am
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