A ZERO-DIMENSIONAL CLIMATE-VEGETATION MODEL CONTAINING GLOBAL CARBON AND HYDROLOGICAL CYCLE

A model of a hypothetical zero-dimensional planet containing a global carbon cycle, which describes the fundamental interaction between clim ate and biosphere, is used as a basis to formulate a new model incorpo rating a hydrological cycle. Using the conservation law for carbon and water in the system the number of differential equations is thereby r educed by two from five to three. The number and positions of the stab le equilibria in the three-dimensional phase space is determined using numerical methods. This numbers is related to the value of the maximu m productivity P-max, the total amount of carbon A and water B in the system as bifurcation parameters of the system. (C) 1998 Elsevier Scie nce B.V. All rights reserved.