Looking at the worldwide surface analysis chart, it looks like land
areas have far more pressure variations than oceans. However, I am not
sure if this is a real effect or simply an artifact of the fact that
there aren't many observation stations on the oceans. Any thoughts?

Here is an example:
http://www.opc.ncep.noaa.gov/UA.shtml

"Andrew Sarangan" > wrote in message
...
> Looking at the worldwide surface analysis chart, it looks like land
> areas have far more pressure variations than oceans. However, I am not
> sure if this is a real effect or simply an artifact of the fact that
> there aren't many observation stations on the oceans. Any thoughts?
>
> Here is an example:
> http://www.opc.ncep.noaa.gov/UA.shtml

Lifting action?

Bottom line is heating of the surface, Andrew. "Insolation" is the buzzword.
Over land, the amount of heat absorbed/reflected determines the amount and
rate of rising air parcels...over water, the absorption rate is pretty
constant. I'm not saying that there are no differences over water, only that
the differences are small...the jet stream plays a part in moving pressure
systems around on the face of the earth with little attention paid to the
composition of the surface.

Bob Gardner

"Andrew Sarangan" > wrote in message
...
> Looking at the worldwide surface analysis chart, it looks like land
> areas have far more pressure variations than oceans. However, I am not
> sure if this is a real effect or simply an artifact of the fact that
> there aren't many observation stations on the oceans. Any thoughts?
>
> Here is an example:
> http://www.opc.ncep.noaa.gov/UA.shtml
>

Andrew Sarangan > wrote in news:50f64be0-71fb-47d0-
:

> Looking at the worldwide surface analysis chart, it looks like land
> areas have far more pressure variations than oceans. However, I am not
> sure if this is a real effect or simply an artifact of the fact that
> there aren't many observation stations on the oceans. Any thoughts?
>

Both land masses and oceans spawn pressure systems. The north atlantic
is a good case in point, where the convergence of cold and warm air
masses spun into a giant mess by coriolis produces wicked lows that can
range as far down as 27.5 ( I've seen it this low in western europe)
Land masses are better at cooking up highs and I've seen it off the
opposite end of the scale in the eastern US at well over 31 inches. You
can also get this anywhere within spitting distance of Russia from one
of the famous "siberian highs"

BTW, when it gets that low or high at a teminal, ATC will only give you
estimates of the pressure, particularly with highs. Their equipment
doesn't go that far.


Bertie

On Mar 29, 8:39*pm, Bertie the Bunyip > wrote:
> Andrew Sarangan > wrote in news:50f64be0-71fb-47d0-
> :
>
> > Looking at the worldwide surface analysis chart, it looks like land
> > areas have far more pressure variations than oceans. However, I am not
> > sure if this is a real effect or simply an artifact of the fact that
> > there aren't many observation stations on the oceans. Any thoughts?
>
> Both land masses and oceans spawn pressure systems. The north atlantic
> is a good case in point, where the convergence of cold and warm air
> masses spun into a giant mess by coriolis produces wicked lows that can
> range as far down as 27.5 ( I've seen it this low *in western europe)
> Land masses are better at cooking up highs and I've seen it off the
> opposite end of the scale in the eastern US at well over 31 inches. You
> can also get this anywhere within spitting distance of Russia from one
> of the famous "siberian highs"
>
> BTW, when it gets that low or high at a teminal, ATC will only give you
> estimates of the pressure, particularly with highs. Their equipment
> doesn't go that far.
>
> Bertie

Nope, wrong again.

buttman > wrote in news:6a881017-8580-4f7c-b9e9-
:

> On Mar 29, 8:39*pm, Bertie the Bunyip > wrote:
>> Andrew Sarangan > wrote in news:50f64be0-71fb-
47d0-
>> :
>>
>> > Looking at the worldwide surface analysis chart, it looks like land
>> > areas have far more pressure variations than oceans. However, I am
not
>> > sure if this is a real effect or simply an artifact of the fact
that
>> > there aren't many observation stations on the oceans. Any thoughts?
>>
>> Both land masses and oceans spawn pressure systems. The north
atlantic
>> is a good case in point, where the convergence of cold and warm air
>> masses spun into a giant mess by coriolis produces wicked lows that
can
>> range as far down as 27.5 ( I've seen it this low *in western europe)
>> Land masses are better at cooking up highs and I've seen it off the
>> opposite end of the scale in the eastern US at well over 31 inches.
You
>> can also get this anywhere within spitting distance of Russia from
one
>> of the famous "siberian highs"
>>
>> BTW, when it gets that low or high at a teminal, ATC will only give
you
>> estimates of the pressure, particularly with highs. Their equipment
>> doesn't go that far.
>>
>> Bertie
>
> Nope, wrong again.
>

You wish wannabe boi.


Bertie