Simulated and observed fluxes of sensible and latent heat and CO2 at the WLEF-TV tower using SiB2.5

Ian Baker, A. Scott Denning, Niall Hanan, Lara Prihodko, Marek Uliasz, Pier Luigi Vidale, Kenneth Davis, Peter Bakwin

Research output: Contribution to journalArticlepeer-review

76 Scopus citations


Three years of meteorological data collected at the WLEF-TV tower were used to drive a revised version of the Simple Biosphere (SiB 2.5) Model. Physiological properties and vegetation phenology were specified from satellite imagery. Simulated fluxes of heat, moisture, and carbon were compared to eddy covariance measurements taken onsite as a means of evaluating model performance on diurnal, synoptic, seasonal, and interannual time scales. The model was very successful in simulating variations of latent heat flux when compared to observations, slightly less so in the simulation of sensible heat flux. The model overestimated peak values of sensible heat flux on both monthly and diurnal scales. There was evidence that the differences between observed and simulated fluxes might be linked to wetlands near the WLEF tower, which were not present in the SiB simulation. The model overestimated the magnitude of the net ecosystem exchange of CO2 in both summer and winter. Mid-day maximum assimilation was well represented by the model, but late afternoon simulations showed excessive carbon uptake due to misrepresentation of within-canopy shading in the model. Interannual variability was not well simulated because only a single year of satellite imagery was used to parameterize the model.

Original languageEnglish (US)
Pages (from-to)1262-1277
Number of pages16
JournalGlobal Change Biology
Issue number9
StatePublished - Sep 2003

All Science Journal Classification (ASJC) codes

  • Global and Planetary Change
  • Environmental Chemistry
  • Ecology
  • Environmental Science(all)


Dive into the research topics of 'Simulated and observed fluxes of sensible and latent heat and CO2 at the WLEF-TV tower using SiB2.5'. Together they form a unique fingerprint.

Cite this