TY  - JOUR
A1  - Siré, Ernst Olof
A1  - Kohlmaier, Gundolf Hans
A1  - Kratz, Gerhard
A1  - Fischbach, Ursula
A1  - Bröhl, Horst
T1  - Comparative dynamics of atmosphere-ocean-models within the description of the perturbed global carbon cycle
T2  - Zeitschrift für Naturforschung, A
N2  - For a certain class of ocean models describing the exchange of inorganic carbon between the atmosphere and the surface layer of the ocean as well as between the surface layer and the deep sea the dynamical airborne fraction is evaluated analytically under the assumption that the growth rate of the atmospheric source term (fossil fuel plus net biogenic carbon input into the atmosphere) is slowly variable with time. Each of these models exhibits a certain uptake capacity of the deep ocean which is quantified. Considerations are made as to whether the terrestrial biota are to be regarded as a source or a sink for additional atmospheric CO2 depending on the modelling of the deep ocean. It is shown that a global one-dimensional box-diffusion ocean model with a depth dependent eddy diffusivity K(z) - K(0) exp[-z/z*], with an adjustable parameter set {K(0), z*}, provides a fairly well fit to the prebomb 14C ocean distribution and to an appreciable net biogenic carbon transfer into the atmosphere. The range of future atmospheric CO2 partial pressures is estimated for a given fossil input.
Y1  - 2014
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/73706
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-737069
SN  - 1865-7109
VL  - 36
IS  - 3
SP  - 233
EP  - 250
PB  - Verlag der Zeitschrift für Naturforschung
CY  - Tübingen
ER  -