Environmental Science Division (EVS)a Division of Argonne National Laboratory

Seminar on soil biogeochemical models

June 20, 2013

Title:Informing Soil Biogeochemical Models: Are Field Measurements Ever Used?
Wilfred M. Post
Climate Change Science Institute and Environmental Science Division, Oak Ridge National Laboratory
Date:Thursday, June 20th, 2013
Time:11 am – 12 noon
Location:Argonne National Laboratory
TCS Building 240
Room 1416

Field measurements form the basis of what we know about soil properties. However, it is difficult to use these measurements directly to infer dynamic processes or predict how soil properties will change with biological, chemical, and environmental forcings. Measurements from a single field experiment are rarely sufficient for either improving model parameters or providing a definitive evaluation of the adequacy of a model’s internal algorithm.

The presenter will provide examples of employing field data to evaluate and improve model performance. The examples will illustrate the use of

  • A global soil database to examine the performance of global biogeochemistry model output from the 5th Climate Model Intercomparison Project (CMIP5);
  • Steady-state and dynamic analyses to develop model parameters for decomposition mediated by microbial enzymes; and
  • Field data to calibrate and validate biological and environmental effects on the rate of soil aggregate formation and the organic matter dynamics within different aggregate fractions.
Photo of Wilfred M. Post
Photo of Wilfred M. Post
portrait of Umakant Mishra