J. Kindermann et al., INTERANNUAL VARIATION OF CARBON EXCHANGE FLUXES IN TERRESTRIAL ECOSYSTEMS, Global biogeochemical cycles, 10(4), 1996, pp. 737-755
A global prognostic physiologically based model of the carbon budget i
n terrestrial ecosystems, the Frankfurt Biosphere Model (FBM), is appl
ied to simulate the interannual variation of carbon exchange fluxes be
tween the atmosphere and the terrestrial biosphere. The data on climat
ic forcing are based on Cramer and Leemans climate maps; the interannu
al variation is introduced according to records of temperature anomali
es and precipitation anomalies for the period 1980 to 1993. The calcul
ated net exchange flux between the atmosphere and the terrestrial bios
phere is compared to the biospheric signal deduced from C-13 measureme
nts. Some intermediate results are presented as well: the contribution
s of the most important global ecosystems to the biospheric signal, th
e contributions of different latitudinal belts to the biospheric signa
l, and the responses of net primary production (NPP) and heterotrophic
respiration (R(h)) From the simulation results it can be inferred tha
t the complex temperature and precipitation responses of NPP and R(h)
in different latitudes and different ecosystem types add up to a globa
l CO2 signal contributing substantially to the atmospheric CO2 anomaly
on the interannual timescale. The temperature response of NPP was fou
nd to be the most important factor determining this signal.