NCI precipitation effects

Precipitation effects adjust tree growth based on plot precipitation.


Weibull precipitation effect

Parameters

Weibull Precip Effect "A" The A parameter for the precipitation effect. Units of precipitation are millimeters per year.
Weibull Precip Effect "B" The B parameter for the precipitation effect. Units of precipitation are millimeters per year.
Weibull Precip Effect "C" The C parameter for the precipitation effect. Units of precipitation are millimeters per year.
Precipitation Type to Use Which precipitation variable should be used.

How it works

Precipitation Effect is calculated as:

PE = Weibull climate growth precipitation effect equation

where:

The desired precipitation variable is set in the Precipitation Type to Use variable.


Double logistic precipitation effect

Parameters

Double Logistic Precip Effect "al"The al parameter for the precipitation effect.
Double Logistic Precip Effect "bl"The bl parameter for the precipitation effect.
Double Logistic Precip Effect "cl"The cl parameter for the precipitation effect.
Double Logistic Precip Effect "ah"The ah parameter for the precipitation effect.
Double Logistic Precip Effect "bh"The bh parameter for the precipitation effect.
Double Logistic Precip Effect "ch"The ch parameter for the precipitation effect.
Precipitation Type to Use Which precipitation variable should be used.

How it works

Precipitation Effect is calculated as:

Double logistic climate growth temperature effect equation

where: