skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Transit times and mean ages for nonautonomous and autonomous compartmental systems

Journal Article · · Journal of Mathematical Biology

We develop a theory for residence times and mean ages for nonautonomous compartmental systems. Using the McKendrick–von Forster equation, we show that the mean ages of mass in a compartmental system satisfy a linear nonautonomous ordinary differential equation that is exponentially stable. We then define a nonautonomous version of residence time as the mean age of mass leaving the compartmental system at a particular time and show that our nonautonomous theory is consistent with the autonomous case. We apply these results to study a nine-dimensional nonautonomous compartmental system modeling the carbon cycle, which is a simplified version of the Carnegie–Ames–Stanford approach (CASA) model.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1333444
Report Number(s):
PNNL-SA-114617
Journal Information:
Journal of Mathematical Biology, Vol. 73, Issue 6-7; ISSN 0303-6812
Publisher:
Springer
Country of Publication:
United States
Language:
English

References (26)

Linear Analysis of soil Decomposition: Insights from the Century Model journal May 1998
Substrate limitations for heterotrophs: Implications for models that estimate the seasonal cycle of atmospheric CO 2 journal December 1996
Age of soil Organic Matter and soil Respiration: Radiocarbon Constraints on Belowground c Dynamics journal April 2000
On the Temperature Dependence of Soil Respiration journal June 1994
Analysis of soil carbon transit times and age distributions using network theories journal January 2009
The relationship between peak warming and cumulative CO2 emissions, and its use to quantify vulnerabilities in the carbon-climate-human system journal January 2011
Qualitative Theory of Compartmental Systems journal March 1993
Earth’s carbon cycle: A mathematical perspective journal September 2014
A semi-analytical solution to accelerate spin-up of a coupled carbon and nitrogen land model to steady state journal January 2012
Terrestrial ecosystem production: A process model based on global satellite and surface data journal December 1993
Positive feedback between global warming and atmospheric CO 2 concentration inferred from past climate change : GLOBAL WARMING FEEDBACK journal May 2006
A note on the concepts of age distribution and transit time in natural reservoirs journal February 1973
Compartment Models and Reservoir Theory journal November 1971
Six Lectures on Dynamical Systems book May 1996
Predictability of the terrestrial carbon cycle journal December 2014
Criteria for exponential dichotomy for triangular systems journal August 2015
The changing carbon cycle at Mauna Loa Observatory journal March 2007
Dichotomy spectra of triangular equations journal June 2015
System Structure and Connectivity book January 1983
A note on the concepts of age distribution and transit time in natural reservoirs journal January 1973
Stability book January 1978
Mean Residence Times in Linear Compartmental Systems. Symbolic Formulae for their Direct Evaluation journal March 2003
Roughness effects on fine-scale anisotropy and anomalous scaling in atmospheric flows journal March 2009
Potential CO2-Enhanced Carbon Storage by the Terrestrial Biosphere journal January 1992
Integral Manifolds for Carathéodory Type Differential Equations in Banach Spaces book May 1996
The relationship between peak warming and cumulative CO2emissions, and its use to quantify vulnerabilities in the carbon–climate–human system journal April 2011

Cited By (16)

Static ecological system analysis: A holistic analysis of compartmental systems journal April 2019
Static ecological system measures: A holistic analysis of compartmental systems journal April 2019
Transit-time and age distributions for nonlinear time-dependent compartmental systems journal January 2018
Modelling transport and mean age of dense core vesicles in large axonal arbours journal August 2019
The muddle of ages, turnover, transit, and residence times in the carbon cycle journal November 2016
Matrix approach to land carbon cycle modeling: A case study with the Community Land Model journal November 2017
Carbon cycle confidence and uncertainty: Exploring variation among soil biogeochemical models journal November 2017
Ages and transit times as important diagnostics of model performance for predicting carbon dynamics in terrestrial vegetation models journal January 2018
Evaluating the simulated mean soil carbon transit times by Earth system models using observations journal January 2019
Static Ecological System Analysis posted_content January 2018
Static Ecological System Measures posted_content January 2018
Modeling transport and mean age of dense core vesicles in large axonal arbors text January 2019
Ages and transit times as important diagnostics of model performance for predicting carbon dynamics in terrestrial vegetation models posted_content August 2017
Dynamic Ecological System Measures posted_content January 2018
On topological entropy and topological pressure of non-autonomous iterated function systems preprint January 2018
The Climate Benefit of Carbon Sequestration journal June 2020

Similar Records

Transit times and mean ages for nonautonomous and autonomous compartmental systems
Journal Article · Fri Apr 01 00:00:00 EDT 2016 · Journal of Mathematical Biology · OSTI ID:1333444

On the probabilistic structure of water age: Probabilistic Water Age
Journal Article · Thu Apr 23 00:00:00 EDT 2015 · Water Resources Research · OSTI ID:1333444

Comparing the Performance of Three Land Models in Global C Cycle Simulations: A Detailed Structural Analysis: Structural Analysis of Land Models
Journal Article · Fri Apr 01 00:00:00 EDT 2016 · Land Degradation and Development · OSTI ID:1333444

Related Subjects