![]() Sea water doesn't freeze at 0°, in fact most parts of the sea newer freeze, regardless of temperature.Īh that's why they use the terminology 'over water' and 'over ice'? Maybe we should put in both sets of numbers then and allow the developer to choose whether it's over water or over ice, and default to 'over water'. to estimate the probability of fog) this would give clearly wrong values. Especially for calculating the dew point over sea water (i.e. Water doesn't freeze just because the air is <0°, and also the ground is not necessarily frozen then. No, I don't think that would be a good idea. Should it be calling CalculateSaturatedVaporPressureOverIce when temperature.DegreesCelsius <= 0? This may or may not be related to (2) above, but I'm not sure. Our function CalculateActualVaporPressure is calling CalculateSaturatedVaporPressureOverWater. Should it be calling CalculateSaturatedVaporPressureOverIce when temperature.DegreesCelsius <= 0? This may or may not be related to (2) above, but I'm not sure.Ĥ. ![]() If the temperature is <= 0, and we decide to go with the alternate numbers from Arden Buck for the saturated vapor pressure calculation, should we also use these a,b,c,d values for the rest of the dew point calculation?Įither I'm blind or I'm not understanding the math, but I can't understand why Ps,m(T) is being calculated when it's then not used in the two lines below it leading to the dew point temperature. ![]() First question: should we change the saturated vapor pressure calculations to use the Arden Buck full equation? That is using two sets of numbers for a,b,c and d? Our functions CalculateSaturatedVaporPressureOverWater and CalculateSaturatedVaporPressureOverIce are using calculations from 1982 but Buck (1996) suggests different numbers. The 3rd set of formulas on (the part that starts "For greater accuracy") and I understand how they got Psm(T), which is the Arden Buck ( ) equation but specifically for temperatures > 0C. Well I gave it a good try, but I'm still clueless following and
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |