Global Biogeochemical Cycles

TRAGNET analysis and synthesis of trace gas fluxes


  • D. Ojima,

  • A. Mosier,

  • S. Del Grosso,

  • W. J. Parton


A critical synthesis of information on the biotic and abiotic controls of trace gas fluxes was needed in order to advance our ability to determine regional estimates of various trace gas compounds. In response to this need, the U.S. Trace Gas Network (TRAGNET), as part of an International Global Atmospheric Chemistry (IGAC) activity, developed an accessible database of multiyear trace gas flux (CH4, NOx, and N2O) and ancillary data from a range of ecosystems (tropical to arctic) across North America, Europe, and Central America. These data have been collected by a number of independent research programs. Through the support of National Science Foundation (NSF), United States Department of Agriculture/Agriculture Research Service (USDA/ARS), Natural Resource Ecology Laboratory at Colorado State University, and National Center for Ecological Analysis and Synthesis (NCEAS), TRAGNET has assembled the data sets and has begun to analyze and synthesize these trace gas data on regional to global scales to (1) determine a generalized understanding of environmental factors controlling trace gas fluxes in order to develop methods for spatial and temporal interpolation and regional extrapolation, (2) test and validate trace gas models across different spatial, temporal, and process scales, and (3) determine regional trace gas fluxes from the measured set of fluxes in the database.