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Soil Nutrient Cycles as a Nonlinear Dynamical System : Volume 11, Issue 5/6 (24/11/2004)

By Manzoni, S.

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Book Id: WPLBN0004019636
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Soil Nutrient Cycles as a Nonlinear Dynamical System : Volume 11, Issue 5/6 (24/11/2004)  
Author: Manzoni, S.
Volume: Vol. 11, Issue 5/6
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2004
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Rodriguez-Iturbe, I., Manzoni, S., Laio, F., D'odorico, P., & Porporato, A. (2004). Soil Nutrient Cycles as a Nonlinear Dynamical System : Volume 11, Issue 5/6 (24/11/2004). Retrieved from http://hawaiilibrary.net/


Description
Description: Department of Civil and Environmental Engineering, Duke University, 127 Hudson Hall, Durham, NC 27708, USA. 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.

Summary
Soil nutrient cycles as a nonlinear dynamical system

 

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