 |
| Titel |
Soil nutrient cycles as a nonlinear dynamical system |
| VerfasserIn |
S. Manzoni, A. Porporato, P. D'Odorico, F. Laio, I. Rodriguez-Iturbe |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1023-5809
|
| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 11, no. 5/6 ; Nr. 11, no. 5/6 (2004-11-24), S.589-598 |
| Datensatznummer |
250008989
|
| Publikation (Nr.) |
 copernicus.org/npg-11-589-2004.pdf |
|
|
|
|
|
| Zusammenfassung |
| An analytical model for the soil carbon and nitrogen cycles is
studied from the dynamical system point of view. Its main
nonlinearities and feedbacks are analyzed by considering the
steady state solution under deterministic
hydro-climatic conditions. It is shown that, changing hydro-climatic
conditions, the system undergoes dynamical bifurcations, shifting
from a stable focus to a stable node and back to a stable focus
when going from dry, to well-watered, and then to saturated
conditions, respectively. An alternative degenerate solution is
also found in cases when the system can not sustain decomposition
under steady external conditions. Different basins of attraction
for "normal" and "degenerate" solutions are investigated as a
function of the system initial conditions. Although preliminary
and limited to the specific form of the model, the present
analysis points out the importance of nonlinear dynamics in the
soil nutrient cycles and their possible complex response to
hydro-climatic forcing. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|