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Grants:"Analysis of Terrestrial Carbon Sequestration Under Elevated CO2 at the Duke Forest FACE Site", DOE, , 2004 - 2007
Description:We have conducted modeling reserach for the Duke FACE since 1996 and studied canopy photosynthesis, plant and soil respiration, ecosystem N cycling, sustainability of C storage in terrestrial ecosystems, C residence times in various pools, dynamics of isotope 13C, and interannual variability of the net ecosystem C exchange. We have also developed a new conceptual model of N limitation to study C and N interactions in response to rising atomosphere CO2, inverse analysis and deconvolution. Built on our past accomplishments, we will continue to lead the modeling-based research in the Duke FACE program.
As more data become available from the FACE site, we will focus on data-model fusion that synthesizes and analyzes experimental data using the models we have developed. The data-model fusion is to scale up leaf-level and soil-core data to estimate whole ecosystem C and N fluxes, which will be used for model predictions of forest C sequestration. We will also develop models to assist interpretation of the isotope data. In the next phase of FACE sudy, we will use newly developed C-N model framework to guide our integration. We will continue to develop inverse approaches to predict long-term C sequestration and to evaluate the capacity of forest C sequestration. Also, we will address the uncertainties in parameter estimation and model prediction with stochastic approaches.