model.joensson.apply {barrks}R Documentation

Use the Jönnson model

Description

This page describes the usage of the the Jönsson model with phenology(). The model specific inputs are listed and its basic functionality is explained. The Jönsson model was published by Jönsson et al. (2011) and parametrized for Ips typographus in southern Sweden.

Arguments

...

See phenology() for a detailled description of the function.

tmean, tmax

Daily mean/maximum temperatures in °C.

daylength

Length of the day in hours. Can be created with create_daylength_rst() or create_daylength_rst().

mode

Can be 'fast' (default) or 'slow'. Determines if the lower ('fast') or upper ('slow') limit for the development of genertion should be used.

Details

In barrks, phenology() is used to apply a model. The following code illustrates which inputs are required to apply the Jönsson model and which additional parameters are available.

phenology("joensson", ..., tmean, tmax, daylength, mode = 'fast')

# calculate submodels separately
phenology("joensson", ..., .submodels = 'onset', tmax)
phenology("joensson", ..., .submodels = 'diapause', tmax, daylength)
phenology("joensson", ..., .submodels = 'development',
          .onset, .diapause = NULL, .mortality = NULL,
          tmean, mode = 'fast')

Value

The function returns a phenology. Look here to find out how it can be analysed.

Functioning

In the following, the basic functioning of the Jönsson model is explained.

Look here to find out how the model parameters affect the actual calculations and which values are used by default.

References

Jönsson AM, Harding S, Krokene P, Lange H, Åke Lindelöw A, Økland B, Ravn HP, Schroeder LM (2011). “Modelling the potential impact of global warming on Ips typographus voltinism and reproductive diapause.” Climatic Change, 109, 695-718. doi:10.1007/s10584-011-0038-4.

See Also

model(), phenology(), model.joensson.customize

Other phenology applications: model.bso.apply, model.chapy.apply, model.lange.apply, model.phenips.apply, model.phenips_clim.apply, model.rity.apply


[Package barrks version 1.0.0 Index]