Semi-empirical modeling of abiotic and biotic factors

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APPENDIX III – List of acronyms and abbreviations
Table AIII – Acronyms and abbreviations
Acronyms
Description
AIC
Akaike Information Criterion
cAIC
Consistent Akaike Information Criterion
CRO
Croplands
DBF
Deciduous Broadleaf Forest
E0
Activation Energy [K]
EBF
Evergreen Broadleaf Forest
EF
Modeling Efficiency from Jannssen and Heuberger (1995)
ENF
Evergreen Needleleaf Forest
f(GPP)
Function describing the dependency of ecosystem respiration on productivity
GPP
Gross Primary Production
GPPlag,i
GRA
GPP measured i days before the observation day of ecosystem respiration
hRmax
GPP value at half saturation
IGBP
International Geosphere Biosphere Programme
K
k2
Half saturation constant of the hyperbolic relationship between RECO and
precipitation
Parameter governing the linear and exponential response of RECO to GPP
LAIMAX
Maximum Leaf Area Index (Understorey + Overstorey)
LAIMAX,o
Maximum Leaf Area Index (Overstorey)
MAE
Mean Absolute Error from Jannssen and Heuberger (1995)
MDS
Marginal Distribution Sampling
MF
Mixed Forest
Ndepo
Total Nitrogen Depositions
NEE
Net Ecosystem Exchange
NEEmid
NEE mid-day
NEEnight
NEE night-time
P
30-day Precipitation running average
PFT
Plant Functional Type
rTPModel-GPPFLUX
R2
Correlation between ‘TP Model’ residuals and GPP reported in FLUXNET
database
Correlation between ‘TP Model’ residuals and GPP computed as described
by Lasslop et al. 2010b
Respiration at reference temperature for ‘TP Model’ with GPP dependency
added
Parameter of exponential dependency between GPP and RECO
RECO
Ecosystem Respiration
Rmax
Plateau of the RECO response to GPP
RMSE
Root Mean Square Error from Jannssen and Heuberger (1995)
Rref
Respiration at reference temperature for ‘TP Model’
SAV
Savanna
SHB
Shrublands
SoilC
Total soil stock (0-50 cm)
rTPModel-GPPLASS
R0
Grasslands
1
SWC
Soil Water Content
T0
Constant temperature from Lloyd and Taylor (1994) at 46.02°C
TA
Air temperature
TP Model
TRef
Temperature and Precipitation model, from Raich et al. (2000) and modified
by Reichstein et al. (2003)
TP biotic model, containing both the dependency on GPP and ecosystem
LAI (Final model formulation)
Reference temperature (15 °C)
ymod
Modeled data as a function of parameter vector
yobs
Observed data
Α
Response of RECO to null precipitation
Θ
Parameter vector
Σ
Weight of cost function
ΩLS
Cost function
TPb Model
2