How can one estimate the water content of the atmosphere from surface
data such as temperature, dew point temperature, sea level pressure
and relative humidity? (The height of the station is also known.)

Thanks your help.

Regards MET

"MET" wrote
...
How can one estimate the water content of the atmosphere from surface
data such as temperature, dew point temperature, sea level pressure
and relative humidity? (The height of the station is also known.)

The most important factor is the electric field.
S*

"MET" wrote in message
...
How can one estimate the water content of the atmosphere from surface
data such as temperature, dew point temperature, sea level pressure
and relative humidity? (The height of the station is also known.)

Thanks your help.

Regards MET

You can't.

Bill Habr wrote:
"MET" wrote in message
...
How can one estimate the water content of the atmosphere from surface
data such as temperature, dew point temperature, sea level pressure
and relative humidity? (The height of the station is also known.)

Thanks your help.

Regards MET

You can't.



You can not calculate exactly, but you can of course estimate it.
E.g.:
http://ams.allenpress.com/perlserv/?...V%3E2.0.CO%3B2

"Bill Habr"
. net...

"MET" wrote in message
...
How can one estimate the water content of the atmosphere from surface
data such as temperature, dew point temperature, sea level pressure
and relative humidity? (The height of the station is also known.)

Thanks your help.

Regards MET

You can't.

Yes. But it is truth for above mentioned data. If one use the electric field
value one can estimate the water content of the atmosphere. See:
ftp://ftp.campbellsci.com/pub/outgoi...0_overview.pdf

The measurement of the electric field is almost the direct measurement of
water content above you.
S*

"Knut-Frode" wrote in message ...
Bill Habr wrote:
"MET" wrote in message
...
How can one estimate the water content of the atmosphere from surface
data such as temperature, dew point temperature, sea level pressure
and relative humidity? (The height of the station is also known.)

Thanks your help.

Regards MET

You can't.



You can not calculate exactly, but you can of course estimate it.
E.g.:

http://ams.allenpress.com/perlserv/?...V%3E2.0.CO%3B2


So estimate the "water content of the atmosphere" and post your answer

"Szczepan Bia³ek" wrote in message
...

"Bill Habr"
. net...

"MET" wrote in message
...
How can one estimate the water content of the atmosphere from surface
data such as temperature, dew point temperature, sea level pressure
and relative humidity? (The height of the station is also known.)

Thanks your help.

Regards MET

You can't.

Yes. But it is truth for above mentioned data. If one use the electric field
value one can estimate the water content of the atmosphere. See:
ftp://ftp.campbellsci.com/pub/outgoi...0_overview.pdf

The measurement of the electric field is almost the direct measurement of
water content above you.
S*



So estimate the "water content of the atmosphere" and post your answer.

Bill Habr wrote:
"Knut-Frode" wrote in message ...
Bill Habr wrote:
"MET" wrote in message
...
How can one estimate the water content of the atmosphere from surface
data such as temperature, dew point temperature, sea level pressure
and relative humidity? (The height of the station is also known.)

Thanks your help.

Regards MET
You can't.



You can not calculate exactly, but you can of course estimate it.
E.g.:

http://ams.allenpress.com/perlserv/?...V%3E2.0.CO%3B2


So estimate the "water content of the atmosphere" and post your answer


The paper gives as best fit:
W = exp(-0.981 + 0.0341*F)
Where W is the water content in cm/m2 and T is the temperature in
Farenheit (old paper...)
So, for example with T = 50F (283 Kelvin), W is 2.06 cm/m2, and with T =
32F (273 Kelvin), W = 1.12 cm/m2.

Knut-Frode wrote:
Bill Habr wrote:
"Knut-Frode" wrote in message
...
Bill Habr wrote:
"MET" wrote in message
...

How can one estimate the water content of the atmosphere from surface
data such as temperature, dew point temperature, sea level pressure
and relative humidity? (The height of the station is also known.)

Thanks your help.

Regards MET
You can't.



You can not calculate exactly, but you can of course estimate it.
E.g.:

http://ams.allenpress.com/perlserv/?...V%3E2.0.CO%3B2



So estimate the "water content of the atmosphere" and post your answer


The paper gives as best fit:
W = exp(-0.981 + 0.0341*F)
Where W is the water content in cm/m2 and T is the temperature in
Farenheit (old paper...)
So, for example with T = 50F (283 Kelvin), W is 2.06 cm/m2, and with T =
32F (273 Kelvin), W = 1.12 cm/m2.

Sorry, Dew point temperature, of course.

So estimate the "water content of the atmosphere" and post your answer.

Sorry, it's only now that I checked here again for an answer to my
initial question. (Since my question didn't get a reply for a while, I
actually lost hope to receive some help through this forum.)

@Szczepan: That's interesting. Unfortunately such measurements are not
(yet?) done or at least the results not yet published from the
different meteorological stations.

@Bill: Yes, I was asking for an *estimation*. Thank you for providing
the link to this paper. Will check now how well the results of this
fitted function compare with some extreme cases.