Total column water calculation from radiosonde data

AI Thread Summary
To calculate total column water from radiosonde station data, one must utilize relative humidity, pressure, and temperature measurements at various altitudes. The process involves converting relative humidity to vapor pressure as a function of altitude and then calculating precipitable water vapor (PWV) within specified altitude intervals. Integration of these values over the desired altitude range will yield the total column water. For those seeking free software options, there are tools available that can assist in this calculation, though specific recommendations were not provided in the discussion. The goal is often to compare the PWV derived from radiosonde data with that obtained from GPS receivers for validation purposes.
saeed_abbasy79
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hello,
i want to calculate total column water from a radiosonde station data. data are relative humidity, pressure and temperature in various altitude. my course is not physics or meteorology. please help me. is there a free software?
 
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As your sonde gains altitude, you're going to be sampling a variety of air masses moving in a variety of directions, i.e., generating a meaningless number. Do you have some more specific purpose you can give us?
 
I estimate precipitable water vapor with a GPS receiver and i want to Compare with radiosonde PWV.
I think that i must calculate Precipitable water vapor in the interval of two altitude and then integrate them (in radiosonde data)
 
Convert relative humidity to vapor pressure as a function of altitude, and you should get what you're after once you sum/integrate over whatever altitude interval is of interest.
 
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