line8000 Posted June 28, 2014 Share Posted June 28, 2014 i got too many information in the internet and got confuse and my calculations make no sense. I have height,pressure(in hPa), temperature, RH, and dew point temp. i would love some guide to calculate Virtual Potential Temperature (theta-v) step by step.eg:i haveheight(m) : 1516 hPa :850 T© : 19.4 RH(%) :25% DPT© : 3.5 thanks. [email protected] Link to comment Share on other sites More sharing options...
isohume Posted June 28, 2014 Share Posted June 28, 2014 http://www.srh.noaa.gov/epz/?n=wxcalc_virtualtemperature Click the link at the bottom to see the correct formula if you want to calculate it by hand. Link to comment Share on other sites More sharing options...
milkman Posted June 28, 2014 Share Posted June 28, 2014 i got too many information in the internet and got confuse and my calculations make no sense. I have height,pressure(in hPa), temperature, RH, and dew point temp. i would love some guide to calculate Virtual Potential Temperature (theta-v) step by step. eg: i have height(m) : 1516 hPa :850 T© : 19.4 RH(%) :25% DPT© : 3.5 thanks. [email protected] Equations needed: Tv = (1+0.61w)T , ThetaV = Tv(1000p)^Rd/Cp Here we are assuming specific humidity q is approx by mix ratio w. You need to find mixing ratio to solve problem. w = RH*ws ws is saturated mix ratio ws = Rd / Rv * esw is saturation vapor pressure Use Clausius-Clapeyron equation to find this esw = 6.11 * exp[Lv*Rv*(1To - 1T)]. To = O*C = 273.15 K All other variables are known or generally constant Remember to use SI units when performing calculations Peace Link to comment Share on other sites More sharing options...
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