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