Annual ICBM re_clim rate-modifying factor: a Ratkowsky-type temperature
response and a piecewise volumetric-moisture response, multiplied and
rescaled to the Swedish Ultuna reference site, averaged over the supplied
series.
Usage
soc_rate_modifier_icbm(temp_c, theta, t_field, t_wilt, porosity)
Source
Katterer, T., Reichstein, M., Andren, O. & Lomander, A. (1998).
Temperature dependence of organic matter decomposition.
doi:10.1007/s003740050430
. Normalization and piecewise moisture form as
implemented in the canonical reclim package.
Arguments
- temp_c
Numeric soil (or air-proxy) temperature series (degrees
Celsius).
- theta
Numeric volumetric soil water content series (fraction).
- t_field
Field-capacity volumetric water content (fraction).
- t_wilt
Wilting-point volumetric water content (fraction).
- porosity
Soil porosity (fraction).
Value
The annual mean of the monthly re_clim values (a single numeric).
Examples
soc_rate_modifier_icbm(
temp_c = c(5, 15, 25),
theta = c(0.20, 0.25, 0.30),
t_field = 0.30,
t_wilt = 0.10,
porosity = 0.45
)
#> [1] 3.162084
