Low pression's life

From: Paolo (XXXpaulloc78_at_virgilio.itXXX)
Date: 11/15/04 

Date: Mon, 15 Nov 2004 19:29:02 GMT

Hi all,

I'm trying to understand how the life of a low pression works.

Often I read on the web that the low pression's life is strongly conditioned
from the "recharge" of cold air.
E.g. the low pression that in the last two-three days affects South Italy is
a great kind of best condition to keep alive this low pression system.

I read that Mediterrain Sea is warm and because cold air (artic) is coming
on, this is the fuel to keep alive and to enforce the low pression system,
with a minimum of hPa very low.

I've always known that cold air is a sign of high pression, because this
kind of air is heavier, and warm air is a sign of low pression. With this
double equality (I think at this point wrong) the situation that we should
have is: in the begining there is low pression in South Italy because water
is warm and air so on, then cold artic air come on and pression should be
raise and low pression system should disappear.

Why, instead, all people say that the incoming cold air will enforce low
pression system?

Thank in advance
Paolo

Relevant Pages

  • Re: Low pressions life
    ... > I'm trying to understand how the life of a low pression works. ... > a great kind of best condition to keep alive this low pression system. ... > I read that Mediterrain Sea is warm and because cold air is coming ...
    (sci.geo.meteorology)
  • Re: Low pressions life
    ... > I'm trying to understand how the life of a low pression works. ... > a great kind of best condition to keep alive this low pression system. ... > I read that Mediterrain Sea is warm and because cold air is coming ...
    (sci.geo.meteorology)