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Carbon Cycle & Ecosystems

This project directly addresses NASA's Terrestrial Ecology program stated goal of improving understanding of the structure and function of ecosystems in the cycling of major biogeochemical elements between the land and the atmosphere. This project specifically supports Subelement 3, Successor Proposals for Synthesis and Integration. We propose a formal multi-scale synthesis and intercomparison project (MsTMIP) to be conducted as a synthesis activity of the NACP, with prescribed environmental and meteorological drivers shared among model teams, and simulations standardized to facilitate comparison with other model results and observations through an integrated evaluation framework. The overall goal of this project is to provide feedback to the terrestrial biospheric modeling community to improve the diagnosis and attribution of carbon sources and sinks across regional and global scales. The outcome of this effort will be a fundamentally improved understanding of the current state of the art in carbon cycle modeling, and will provide the critical synthesis and feedback needed to improve our ability to understand the global carbon cycle. To achieve this goal, we build upon current and past synthesis activities by developing an integrative framework that all TBMs can use as a tool to continually evaluate overall model performance against a complete set of observational constraints. There are five main steps of this study: (1) recruit and develop a modeling cohort for participation in this study, beginning with those groups that submitted regional results to the NACP interim synthesis; (2) Assemble benchmark driver data sets to be used by participating modeling teams to ensure consistent and comparable model results; (3) develop a detailed model simulation protocol guided by feedback and support of participating modeling teams; (4) evaluate model performance against observations and other model estimations through a set of quantitative performance measures and metrics based on inventory and flux tower-based observations, as well as inverse and other forward model estimates; and (5) develop an infrastructure to support the model simulations, model comparison, and evaluation. By prescribing standard spin-up procedures, input data sets, and output parameter formats, the proposed intercomparison will quantify and diagnose biases and uncertainties in TBM estimates of regional and global carbon budgets resulting from differences in model formulation and parameterization. Overall, this study will provide unprecedented feedback to the terrestrial biospheric modeling community to improve the diagnosis attribution of carbon sources and sinks.

Project PI: Anna Michalak/University of Michigan

Department of Civil and Environmental Engineering, and Department of Atmospheric, Oceanic and Space Sciences The University of Michigan,183 EWRE Building, Ann Arbor, MI 48109-2125

Phone: (734) 763-9664

Email: Anna.Michalak @umich .edu

http://www-personal.umich.edu/~amichala/

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Started: Sep 02, 2010

Last Activity: Feb 09, 2011

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