adiabatic_ascent {aiRthermo} | R Documentation |

## Properties of an air parcel after adiabatic ascent

### Description

A particle located at Pstart pressure (Pa), Tstart temperature (K) and wstart mixing ratio (kg/kg) ascends (pseudo)adiabatically to Pend (Pa). The evolution is computed by numerically integrating the dT/dP ordinary differential equation (ODE) using a 4th order Runge-Kutta scheme, assuming hydrostatic equilibrium and that the particle is saturated after the Lifted Condensation Level (LCL).

### Usage

```
adiabatic_ascent(Pstart, Tstart, wstart, Pend, deltaP = 1)
```

### Arguments

`Pstart` |
Initial value for pressure (Pa). |

`Tstart` |
Initial value for temperature (K). |

`wstart` |
Initial value for mixing ratio (kg/kg). |

`Pend` |
End value for pressure (Pa). |

`deltaP` |
deltaP (Pa) represents the numerical increment used for integrating the Ordinary Differential Equation (ODE) representing the vertical evolution. |

### Value

The function returns a list that includes Tend (final value of temperature) and mixRatioEnd (mixing ratio of the air parcel at the end of the evolution).

`Tend` |
Temperature at the end (K). |

`mixRatioEnd` |
Mixing ratio at the end (kg/kg). |

### Examples

```
P0<-101325
T0<-273.15
w0<-0.0025
adiabEvov<-adiabatic_ascent(P0,T0,w0,50000,5)
```

*aiRthermo*version 1.2.1 Index]