|  | about 4C news 4C guide theory applications publications contact |  | user interface | user manual
### Yearly Output Yearly output variables are the state variables valid during the year, i.e. the value at the beginning of the year, and fluxes during that year. This means that the result of allocation, mortality and regeneration calculated at the end of the current year can be seen as state variables of the next year. The output files are named as follows <sitename>_<var>.<typ><anz_sim> with: <sitename> location name <var> content description <typ> typ of output file <anz_sim> number of simulation Example: site1_soil.out2 yearly output of soil values from the second run of the simulation at location site1 Output files and their contents: Yearly output of scalars and fields
<var> | content | variable | unit
c_bal | Yearly C-Balance, C-stocks and –fluxes; both in kg C/ha and mol/m² |  |
Chum | C content of humus (hum) per layer |  |
Copm | C content of organic primary matter (OPM) per layer | C_opm | g C/ m²
clim | Output of yearly climate-items per site and simulation |  |
indi | Indices of fire and biodiversity |  |
litter | Yearly litter fractions and percentage of respective biomass |  |
Nhum | N content of humus (hum) per layer |  |
Nopm | N content of organic primary matter (OPM) per layer |  |
manrec | Data about management masures |  |
mansort | Output of sortiments for years with management |  |
root | Vertical root distribution; relative share of root mass per layer for the whole stand | root_fr |
sdrought | Number of days with water content near wilting point (drought days) per layer |  |
soil | Data from soil model |  |
spec | Species number and name |  |
standsort | Sortiment of whole stand (without harvested trees) |  |
veg * | Values for the whole stand (per ha) |  |
veg_be | Values for the whole stand (per ha) for beech |  |
veg_bi | Values for the whole stand (per ha) for birch |  |
veg_pi | Values for the whole stand (per ha) for pine |  |
veg_oa | Values for the whole stand (per ha) for oak |  |
veg_sp | Values for the whole stand (per ha) for spruce |  |
veg_sveg | Values for the whole stand (per ha) for ground vegetation |  |
Yearly output for classes
<var> | content | unit
classd | stem number per diameter classes, 5-cm-steps | N/ha
classd_h | mean height per diameter class | cm
classdm | diameter classes for harvested trees | N/ha
classdm_h | mean height per diameter class of harvested trees | cm
classh | number of trees per height class | N/ha
classage | age of trees per diameter class | a
classmvol | volume of tress per diameter class of harvested trees | m³/ha
classt | number of dead trees per diameter class | N/ha
c_bal: Output of values of carbon balance Variables are calculated before output. All variables are values per year. Often used conversion factors.
name | variable | description | unit
Year | time | year of simulation | --
GPP | y_GPP | gross primary production | kg C/ha
NPP | y_NPP | net primary production | kg C/ha
NEP | y_NEP | net ecosystem production | kg C/ha
Veg_Resp | y_autresp | total respiration of all cohorts and species | kg C/ha
Soil_Resp | y_resps | soil respiration | kg C/ha
Tot_Resp | y_resptot | total respiration | kg C/ha
C_soil | y_C_tot | total soil carbon stock | kg C/ha
C_dead_st | y_C_d_st | carbon in stems of dead trees | kg C/ha
C_sumvsab | y_sumvsab | carbon in total sum of volume of removed stems by management | kg C/ha
C_biomass | y_sumbio | total biomass of all cohorts and all species | kg C/ha
C_tot_ES | y_C_tot_es | total carbon of ecosystem | kg C/ha
GPP | ym_GPP | gross primary production | mol/m²
NPP | ym_NPP | net primary production | mol/m²
NEP | ym_NEP | net ecosystem production | mol/m²
Veg_Resp | ym_autresp | total respiration of all cohorts and species | mol/m²
Soil_Resp | ym_resps | soil respiration | mol/m²
Tot_Resp | ym_resptot | total respiration | mol/m²
C_soil | ym_C_tot | total soil carbon stock | mol/m²
C_dead_st | ym_C_d_st | carbon in stems of dead trees | mol/m²
C_sumvsab | ym_sumvsab | carbon in total sum of volume of removed stems by management | mol/m²
C_biomass | ym_sumbio | total biomass of all cohorts and all species | mol/m²
C_tot_ES | ym_C_tot_es | total carbon of ecosystem | mol/m²
clim: Output of climatic values
name | variable | description | unit
Year | time | year of simulation | --
Temp | med_air | mean air temperature of the year | °C
Prec | sum_prec | amount of precepitation of the year | mm
Radiation | med_rad | mean radiation of the year | J/cm²
Wind | med_wind | mean wind speed of the year | m/s
CO2 | co2 * 1000000 | atmospheric CO2 content | ppm
GDD | gdday | annual growing degree day | °C
summerdays | days_summer | number of summer days (Tmax > 25°C) | --
hotdays | days_hot | number of hot days (Tmax > 30°C) | --
icedays | days_ice | number of ice days (Tmax < 0°C) | --
drydays | days_dry | number of days without precipitation | --
hraindays | days_hrain | number of days with heavy rain (> 10 mm) | --
snowdays | days_snow | number of days with snow (from 4C simulation) | --
Ind_arid | ind_arid_an | annual aridity index UNEP | --
CWB | cwb_an | annual climate water balance | --
Ind_Lang | ind_lang_an | annual climate index acc. Linsser/Lang | --
Ind_Cout | ind_cout_an | annual climate index Coutange | --
Ind_Wissm | ind_wiss_an | annual climate index v. Wissmann | --
Ind_Mart | ind_mart_an | annual climate index Martonne | --
Ind_Mart_VP | ind_mart_vp | annual climate index martonne for vegetation period (May - September) | --
Ind_Emb | ind_emb | annual climate index Emberger | --
Ind_Weck | ind_weck | annual climate index Weck | --
Ind_Reich | ind_reich | annual climate index Reichel | --
Ind_Gor | con_gor | annual continentality index Gorczynski | --
I_Currey | con_cur | annual continentality index Currey | --
I_Conrad | con_con | annual continentality index Conrad | --
NTIndex | ntindex | Nun temeprature index | --
Ind_Budyko | ind_bud | annaul dryness index acc. Budyko | --
F_day | hdnlf | number of days of late frost during vegetation period | --
F_day_sp | hdnlf_sp | number of days of late frost after bud burst | --
l_frost | hdate_lf | date of last frost day after start of vegetation period | --
l_frosttot | hdate_lftot | date of last frost day | --
soil: Output of yearly soil-items per location and simulation
name | variable | description | unit
Year | time | year of simulation |
Temp | med_air | mean temperature of the year | °C
Prec | sum_prec | amount of precepitation of the year | mm
Interc | interc_cum | amount of interception of the year | mm
Percol | perc_cum | annual sum of leachate discharge of the last layer | mm
Wupt | wupt_cum | annual total-water-pick from soil as sum of wutot (=wutot_ev + wutot_r) | mm
Wuptroot | wupt_r_c | annual cumulative water assimilation by roots = current transpiration as sum of daily wutot_r | mm
Transtree | tra_tr_cum |  |
Transsveg | tra_sv_cum |  |
Wuptsoil | wupt_e_c | annual cumulative water-pick by soil-evaporation as sum of daily wutot_ev | mm
AET | aet_cum |  |
Wats_tot | wat_tot | total water content in the soil profile at the end of the year | mm
GP_can | gp_can | unstressed stomatal conductance of the canopy | mol/m²/d
N_min | N_min | annual cumulative net mineralisation | g/m²
N_tot | N_tot | total nitrogen matter in the soil profile at the end of the year without dead stems | g/m²
C_tot | C_tot | total carbon matter in the soil profile at the end of the year without dead stems | g/m²
N_antot | N_an_tot | total inorganic Nitrogen in the soil profile at the end of the year | g/m²
N_humtot | N_hum_tot | total nitrogen matter of humic in the soil profile at the end of the year | g/m²
C_humtot | C_hum_tot | total carbon matter of humic matter in the soil profile at the end of the year | g/m²
N_hum(1) | N_hum(1) | N-content of humus of the forest floor (first layer) at the end of the year | g/m²
C_hum(1) | C_hum(1) | C-content of humus of the forest floor (first layer) at the end of the year | g/m²
N_litter | N_lit | N-quantity of the whole litter input of the actual year | g/m²
C_litter | C_lit | C-quantity of the whole litter input of the actual year | g/m²
C_opm_fol | C_opm_fol | C-content of total foliage litter pool at the end of the year | g/m²
C_opm_frt | C_opm_frt | C-content of total fine root litter pool at the end of the year | g/m²
C_opm_crt | C_opm_crt | C-content of total coarse root litter pool at the end of the year | g/m²
C_opm_tbc | C_opm_tb | C-content of total twigs, branches root litter pool at the end of the year | g/m²
C_opm_stm | C_opm_stem | C-content of total stemwood litter pool at the end of the year | g/m²
Nupt | Nupt_c | annual total-N-assimilation | g/m²
Nleach | Nleach_c | annual N-wash-out of the last layer | g/m²
N_depo | Ndep_cum |  | g/m2
Soil_Resp | resps_c | annual C-quantity of soil respiration as sum of respsoil | gC/m²
veg Remark : All variables are results for the current simulation year, i.e. LAI and biomass give values that were calculated at the end of the year.
name | variable | description | unit
Year | time | year of simulation |
Spec | anz_spec |  |
Coh | anz_coh |  |
Tree | anz_tree_ha |  | ha -1
LAI | laimax |  | m²/m²
Biomass | sumbio | sum of above- and belowground biomass | kg DW/ha
NPPsum | sumnpp | annual net primary productivity | kg DW/ha/yr
Meddiam | med_diam | DG | cm
Domhei | hdom | height of 100 dominating trees | cm
Fol_Bio | totfol | foliage | kg DW/ha
Sap_Bio | totsap | sapwood | kg DW/ha
Frt_Bio | totfrt | fine roots | kg DW/ha
Hrt_Bio | tothrt | heartwood | kg DW/ha
Stem_inc | totsteminc | stem mass increment | kg DW/ha/yr
Stemvol | totstem_m3 | total stem volume | m³
rem_stems | sumvsab | stem mass of trees harvested at the end of the year | kg DW/ha
dead_stems | sumvsdead | stem mass of trees dying at the end of the year | kg DW/ha
Bedeckungsgrad | crown_area/kpatchsize |  |
drIndAl |  | drought stress allocation | -
Ndem |  |  | g N/m²
gp_can_mean |  |  | mol/m²
gp_can_min |  |  | mol/m²
gp_can_max |  |  | mol/m²
mean_diam | mean_diam | mean diameter | cm
mean_height | mean_height | mean height | m
basal area | basal_area | basal area | m²
about 4C | news | 4C guide | theory | applications | publications | contact