dew.point {bigleaf} | R Documentation |

## Dew Point

### Description

calculates the dew point, the temperature to which air must be cooled to become saturated (i.e. e = Esat(Td))

### Usage

```
dew.point(
Tair,
VPD,
accuracy = 0.001,
Esat.formula = c("Sonntag_1990", "Alduchov_1996", "Allen_1998"),
constants = bigleaf.constants()
)
```

### Arguments

`Tair` |
Air temperature (degC) |

`VPD` |
Vapor pressure deficit (kPa) |

`accuracy` |
Accuracy of the result (deg C) |

`Esat.formula` |
Optional: formula to be used for the calculation of esat and the slope of esat.
One of |

`constants` |
Pa2kPa - conversion pascal (Pa) to kilopascal (kPa) |

### Details

Dew point temperature (Td) is defined by:

`e = Esat(Td)`

where e is vapor pressure of the air and Esat is the vapor pressure deficit.
This equation is solved for Td using `optimize`

.

### Value

`Td -` |
dew point temperature (degC) |

### References

Monteith J.L., Unsworth M.H., 2008: Principles of Environmental Physics. 3rd edition. Academic Press, London.

### Examples

```
dew.point(c(25,30),1.5)
```

[Package

*bigleaf*version 0.8.2 Index]