The age-class module provides forest area in age-classes to other
modules. The interface im_forest_ageclass
is used in 35_natveg for the initialization of secondary
forest areas.
Description | Unit | |
---|---|---|
im_forest_ageclass (j, ac) |
Forest area in 5-year age-classes based on GFAD | \(10^6 ha\) |
This realization provides forest area in age-classes
im_forest_ageclass
based on the Global Forest Age Dataset
(GFAD V1.1) from Poulter et al. (2019).
Limitations Disturbances such as forest fires change the age structure of forests over time. GFAD V1.1 likely includes such disturbances in younger age-classes (
ac_young
). Since forest disturbances are not modeled extensively in MAgPIE, using these numbers directly in the model might generate biases.
Description | Unit | A | |
---|---|---|---|
f28_forestageclasses (j, ac_gfad) |
Forest area in 15 10-year age classes from GFAD | \(Mha\) | x |
description | |
---|---|
ac | Age classes |
ac_est(ac) | Dynamic subset of age classes for establishment |
ac_gfad | Forest age classes in GFAD data set |
ac_gfad_to_ac(ac_gfad, ac) | mapping between ac and ac_gfad |
ac_sub(ac) | Dynamic subset of age classes excluding establishment |
ac_young(ac) | Young age classes |
age | Population age groups |
j | number of LPJ cells |
t(t_all) | Simulated time periods |
Abhijeet Mishra, Florian Humpenöder