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Goff–Gratch Equation for Ice

The Goff–Gratch equation is an experimental correlation proposed to estimate the saturation water vapor pressure at a given temperature.

The Goff-Gratch equation describes a nonlinear relationship between temperature and saturation vapor pressure over ice.

Formula

Log[Quantity[0.16347081228646623, "Kilopascals"^(-1)]*QuantityVariable[Subscript["P", "w"], "Pressure"]]/Log[10] == -1.5489286414872234*Log[Quantity[273.16, "Kelvins"]/QuantityVariable["T", "Temperature"]] - 9.09718*(-1 + Quantity[273.16, "Kelvins"]/QuantityVariable["T", "Temperature"]) + 0.876793*(1 + Quantity[-0.0036608581051398447, "Kelvins"^(-1)]*QuantityVariable["T", "Temperature"])

symbol description physical quantity
Pw saturation vapor pressure "Pressure"
T moist air temperature "Temperature"

Forms

Examples

Get the resource:

In[1]:=
ResourceObject["Goff\[Dash]Gratch Equation for Ice"]
Out[1]=

Get the formula:

In[2]:=
FormulaData[ResourceObject["Goff\[Dash]Gratch Equation for Ice"]]
Out[2]=

Use some values:

In[3]:=
FormulaData[ ResourceObject[ "Goff\[Dash]Gratch Equation for Ice"], {QuantityVariable[ "T","Temperature"] -> Quantity[-5, "DegreesCelsius"]}]
Out[3]=

Source Metadata

  • Creator:
  • Date: 1946

Publisher Information