calc_sumefftemp

Calculate sum of effective temperatures (SET)

internal

Methods to calculate and present 'PHENTHAUproc', an early warning and decision support system for hazard assessment and control of oak processionary moth (OPM) using local and spatial temperature data. It was created by Halbig et al. 2024 (<doi:10.1016/j.foreco.2023.121525>) at FVA (<https://www.fva-bw.de/en/homepage/>) Forest Research Institute Baden-Wuerttemberg, Germany and at BOKU - University of Natural Ressources and Life Sciences, Vienna, Austria.

Lorenz Bachfischer

PHENTHAUproc

Phenology Modelling of Thaumetopoea Processionea

Department of Forest Protection, FVA 

calc_sumefftemp function

<dl><dt>x</dt>
<dd>SpatRaster list (tmean, tmax, tmin) - numeric - with time attribute</dd>
<dt>cf_temp</dt>
<dd><ul>
<li>character - "tmean" for cold days and "tmin" for frost days</li>
</ul></dd>
<dt>cf_start</dt>
<dd><ul>
<li>Date - start of cold/frost timeseries</li>
</ul></dd>
<dt>cf_end</dt>
<dd><ul>
<li>Date - end of cold/frost timeseries</li>
</ul></dd>
<dt>cf_limit</dt>
<dd><ul>
<li>numeric - threshold under which a day is defined as
cold/frost day</li>
</ul></dd>
<dt>set</dt>
<dd><ul>
<li>function - x is cold/frost days, a and b are parameter i.e.
function (x, a, b) a + b*x</li>
</ul></dd>
<dt>a</dt>
<dd><ul>
<li>numeric - parameter for set function</li>
</ul></dd>
<dt>b</dt>
<dd><ul>
<li>numeric - parameter for set function</li>
</ul></dd></dl>

Arguments

Calculate sum of effective temperatures (SET) — calc_sumefftemp

<dl>

<dt>x</dt>
<dd>SpatRaster list (tmean, tmax, tmin) - numeric - with time attribute</dd>


<dt>cf_temp</dt>
<dd><ul>
<li>character - "tmean" for cold days and "tmin" for frost days</li>
</ul></dd>


<dt>cf_start</dt>
<dd><ul>
<li>Date - start of cold/frost timeseries</li>
</ul></dd>


<dt>cf_end</dt>
<dd><ul>
<li>Date - end of cold/frost timeseries</li>
</ul></dd>


<dt>cf_limit</dt>
<dd><ul>
<li>numeric - threshold under which a day is defined as
cold/frost day</li>
</ul></dd>


<dt>set</dt>
<dd><ul>
<li>function - x is cold/frost days, a and b are parameter i.e.
function (x, a, b) a + b*x</li>
</ul></dd>


<dt>a</dt>
<dd><ul>
<li>numeric - parameter for set function</li>
</ul></dd>


<dt>b</dt>
<dd><ul>
<li>numeric - parameter for set function</li>
</ul></dd>

</dl>

calc_sumefftemp: Calculate sum of effective temperatures (SET)

Description

Usage

Value

Arguments

See Also