http://www.osdpd.noaa.gov/data/sst/a....3.25.2010.gif

Shows a quite cold pool in the Gulf of Mexico - but with a warm centre -
is this to do with undersea contours or something else I wonder. It
shows up very well on IR images from the GOES E satellite.

Cheers

James
--
James Brown

James Brown wrote:

http://www.osdpd.noaa.gov/data/sst/a....3.25.2010.gif

Shows a quite cold pool in the Gulf of Mexico - but with a warm centre - is
this to do with undersea contours or something else I wonder. It shows up
very well on IR images from the GOES E satellite.

Cheers

James

This is the so-called "Loop Current". It's a common feature in the Gulf of
Mexico. There's a huge number of references available if you Google "Gulf of
Mexico Loop Current".

--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.

In message , Norman
writes
James Brown wrote:

http://www.osdpd.noaa.gov/data/sst/a....3.25.2010.gif

Shows a quite cold pool in the Gulf of Mexico - but with a warm centre - is
this to do with undersea contours or something else I wonder. It shows up
very well on IR images from the GOES E satellite.

Cheers

James

This is the so-called "Loop Current". It's a common feature in the Gulf of
Mexico. There's a huge number of references available if you Google "Gulf of
Mexico Loop Current".



Thank you so much for that Norman - quite a wealth of material there,

Cheers

James
--
James Brown

On 27 Mar, 22:03, James Brown
wrote:
In message , Norman
writes

http://www.osdpd.noaa.gov/data/sst/a....3.25.2010.gif

Shows a quite cold pool in the Gulf of Mexico - but with a warm centre - is
this to do with undersea contours or something else I wonder. It shows up
very well on IR images from the GOES E satellite.

This is the so-called "Loop Current". It's a common feature in the Gulf of
Mexico. There's a huge number of references available if you Google "Gulf of
Mexico Loop Current".

Thank you so much for that Norman - quite a wealth of material there,

Let me know what you find out. I got turned off when I saw the word
anomaly.

This is from one page:

"…if the water is still warm at lower depths, then water being pulled
to the surface remains warm, and the hurricane can increase in
intensity if other atmospheric conditions are also conducive to
strengthening.

Meteorologists look for areas of deep warm water of at least 26
degrees Celsius (79°F). A continuous supply of warm water is one of
several critical factors in enabling hurricanes to intensify beyond
the initial level of a major hurricane (Category 3)"

[So how does the water get heated to that depth in a current doing 4
or 5 knots?

The temperatures in the link vary from -3 to 1 degree Centigrade. Not
a lot for a current that fuels northern Europe. Is that what they
meant by anomaly or was it just the usual lack of imagination?

North America has been subject to severe floods for a while now. And
with the thaw the Mississippi must have been an active part of all
this.]

"If the storm moves fast it may not intensify to a grand scale.
However, since Hurricane Ivan in 2004, the 5 hurricanes to make it to
Cat 5 strength, 3 of them went straight through the Loop Current (this
isn't counting the Cat 3 and 4 storms.)"

So it all depends on, well.... that depends...?

I thought I'd seen this loop effect somewhere before. It's (probably)
the effect of an open enclosed system when the input from one
reservoir is slightly greater than from the other(s).

No doubt the loop has a slightly different lien when the chief input
source is the stuff coming up from Mexico.
http://en.wikipedia.org/wiki/Fluidics

That would (obviously) occur in summer.

In a closed system, this principal becomes a vacuum pump rather than a
whistle. Further reduction in its intricacy and it reverts to a spigot
or (as in this case) a river mouth.

This shows the Atlantic SST anomaly.

http://www.nhc.noaa.gov/tafb/atl_anom.gif

A 2C difference is a lot Hurricane wise. Other factors of course
affect Hurricne formation. I live in Florida.....

On 29 Mar, 11:39, MahFL wrote:

This shows the Atlantic SST anomaly.

http://www.nhc.noaa.gov/tafb/atl_anom.gif*

It's a very graphic graphic. All the more interesting in that outside
of the Arctic I'd thought anything less than cyan impossible.

It does demonstrate a nice cyclonic effect on the thermo-haline column
though. We've just been through a period of dual quakes, dual occluded
fronts and sdual/s twin focussed SSP centres. You can call them
elongations if you like.

There is nothing like a twin gyre to make me feel smug and comfortable
with it. (*I've bagged it and will post a link later, IIR.)

A 2C difference is a lot, Hurricane wise. Other factors of course
affect Hurricane formation. I live in Florida.....

A 2 degree Centigrade difference involves a fairly small pressure
change; which in a hurricane occurs every fewful feet. I live
elsewhere. It doesn't vary the fact.

Or does it?