# ET.Linacre

##### Linacre Formulation

Implementing the Linacre formulation for estimating actual evapotranspiration.

- Keywords
- evapotranspiration, Linacre, actual evapotranspiration

##### Usage

```
# S3 method for Linacre
ET(data, constants, ts="daily", …)
```

##### Arguments

- data
A list of data which contains the following items (climate variables) required by Linacre formulation:

*Tmax*,*Tmin*,*Tdew*- constants
A list named

`constants`

consists of constants required for the calculation of Linacre formulation which must contain the following items:*Elev*- ground elevation above mean sea level in m,*lat*- latitude in degrees.- ts
Must be either

`daily`

,`monthly`

or`annual`

, which indicates the disired time step that the output ET estimates should be on. Default is`daily`

.- …
Dummy for generic function, no need to define.

##### Details

This formulation provides a single calculation method with no alternatives available.

##### Value

The function prints a calculation summary to the screen containing the following elements:
- ET model name and ET quantity estimated
- Time step of the output ET estimates (i.e. the value of argument `ts`

)
- Units of the output ET estimates
- Time duration of the ET estimation
- Number of ET estimates obtained in the entire time-series
- Basic statistics of the estimated ET time-series including *mean*, *max* and *min* values.

The function also generates a list containing the following components, which is saved into a `csv`

file named as *ET_Linacre.csv* in the working directory:

Daily aggregated estimations of Linacre actual evapotranspiration.

Monthly aggregated estimations of Linacre actual evapotranspiration.

Annually aggregated estimations of Linacre actual evapotranspiration.

Monthly averaged estimations of daily Linacre actual evapotranspiration.

Annually averaged estimations of daily Linacre actual evapotranspiration.

Name of the formulation used which equals to `Linacre`

.

Type of the estimation obtained which is `Actual Evapotranspiration`

.

##### References

Linacre, E. T. 1977. *A simple formula for estimating evaporation rates in various climates, using temperature data alone*. Agricultural meteorology, 18, 409-424.

##### See Also

##### Examples

```
# NOT RUN {
# Use processed existing data set and constants from kent Town, Adelaide
data("processeddata")
data("constants")
# Call ET.Linacre under the generic function ET
results <- ET.Linacre(data, constants, ts="daily")
# }
```

*Documentation reproduced from package Evapotranspiration, version 1.10, License: GPL (>= 2)*