The Terrestrial Ecosystem Science and Technology (TEST) group seeks to improve the representation of ecosystem processes in Earth System Models in order to increase our ability to understand and project global change. We study processes that have a global impact on climate, and focus on ecosystems that are poorly understood, sensitive to global change, and inadequately represented in models. We are also interested in applying our techniques to address questions related to global food security and bioenergy.
The goal of TEST is to advance process level understanding of terrestrial ecosystems, incorporate new knowledge into models, reduce model uncertainty and ultimately improve our ability to understand and project global change.
The Predictive Ecosystem Analyzer (PEcAn) is an integrated ecological bioinformatics toolbox (LeBauer et al, 2013) which consists of: 1) a scientific workflow system to manage the immense amounts of publicly-available environmental data and 2) a Bayesian data assimilation system to synthesize this information within state-of-the-art ecosystems models. This project is motivated by the fact that many of the most pressing questions about global change are not necessarily limited by the need to collect new data as much as by our ability to synthesize existing data. This project seeks to improve this ability by developing a framework for integrating multiple data sources in a sensible manner.
The output of the data assimilation system will be a regional-scale high-resolution estimate of both the terrestrial carbon cycle and plant biodiversity based on the best available data and with a robust accounting of the uncertainties involved. The workflow system will allow ecosystem modeling to be more reproducible, automated, and transparent in terms of operations applied to data, and thus ultimately more comprehensible to both peers and the public. It will reduce the redundancy of effort among modeling groups, facilitate collaboration, and make models more accessible the rest of the research community.
PEcAn is not itself an ecosystem model, and it can be used to with a variety of different ecosystem models; integrating a model involves writing a wrapper to convert inputs and outputs to and from the standards used by PEcAn.
Click here for a complete list of PEcAn options
Click here to run PEcAn using the BNL/TEST web interface
Click here to view and analyze past PEcAn experiments and simulations
Click here to login to the PEcAn trait and simulation database (BETYdb)
RStudio is an integrated development environment (IDE) for R. It includes a console, syntax-highlighting editor that supports direct code execution, as well as tools for plotting, history, debugging and workspace management.
Click here to run R in RStudio on the BNL/TEST server cluster