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NACP_MODELED_NEE_NEP_FLUXES NACP North American 8-km Net Ecosystem Exchange and Component Fluxes, 2004 TURNER, D.P.; RITTS, W.D.; JACOBSON, A.R.; WANG, W.; NEMANI, R.R. NACP North American 8-km Net Ecosystem Exchange and Component Fluxes, 2004 2014 Oak Ridge, Tennessee, U.S.A. Oak Ridge National Laboratory Distributed Active Archive Center Online Files doi:10.3334/ORNLDAAC/1203 1203

ABSTRACT: This data set provides modeled carbon flux estimates at 8-km spatial resolution over North America for the year 2004 of (1) net ecosystem exchange (NEE) of carbon dioxide (CO2), (2) net ecosystem production (NEP, the balance of net primary production and heterotrophic respiration), (3) stream evasion (CO2 emitted from streams and rivers), (4) emissions from harvested forest and agricultural products, and (5) emissions from biomass burning. Annual estimates, in g C/m2/year, are provided for all five fluxes. Daily estimates, in g C/m2/day, are provided for NEP and stream evasion fluxes. Fluxes for fire emissions, harvest decomposition/respiration, stream evasion, and NEP were derived as described in Section 5. NEE fluxes were estimated using a full bottom-up accounting of NEE produced by integrating emissions from harvested forest and agricultural products, CO2 emitted from streams and rivers, and biomass burning in the CarbonTracker (version 2011_oi) modeling system. NEE estimates were run in the forward mode through the CarbonTracker inversion setup that calculates CO2 uptake and release at the Earth's surface over time. Refer to Turner et al.(2013) for details. There are seven data files in NetCDF (.nc) format with this data set, including: five annual files for fire emissions, harvest decomposition/respiration, stream evasion, NEP, and NEE fluxes; and two daily files for NEP and stream evasion fluxes.

2004-01-01 2004-12-31 COMPLETE 2.736 90 -179.553 -34.113 ESIP Earth Science Information Partners Program EOSDIS Earth Observing System Data Information System TECHNICAL CONTACT ORNL DAAC User Services ORNL DAAC USER SERVICES OFFICE OAK RIDGE NATIONAL LABORATORY OAK RIDGE, TENNESSEE 37831 USA DIF AUTHOR ORNL DAAC User Services ornldaac@ornl.gov (865) 241-3952 (865) 574-4665

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Oak Ridge Tennessee 37831-6407 USA 2014-01-13 ORNL_DAAC THE OAK RIDGE NATIONAL LABORATORY (ORNL) DISTRIBUTED ACTIVE ARCHIVE CENTER (DAAC) http://daac.ornl.gov/ 1203 DATA CENTER CONTACT ORNL DAAC USER SERVICES ornldaac@ornl.gov +1(865)241-3952 +1(865)574-4665

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Oak Ridge Tennessee 37831-6407 USA EARTH SCIENCE ATMOSPHERE AIR QUALITY EMISSIONS EARTH SCIENCE ATMOSPHERE ATMOSPHERIC CHEMISTRY CARBON AND HYDROCARBON COMPOUNDS EARTH SCIENCE BIOSPHERE ECOLOGICAL DYNAMICS ECOSYSTEM FUNCTIONS EARTH SCIENCE HUMAN DIMENSIONS ENVIRONMENTAL IMPACTS BIOMASS BURNING EMISSION SOURCES CARBON DIOXIDE EMISSION GET DATA http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1203 VIEW RELATED INFORMATION https://daac.ornl.gov//NACP/guides/NACP_Modeled_NEE_NEP_Fluxes.html NACP North American 8-km Net Ecosystem Exchange and Component Fluxes, 2004 USA/NASA ENGLISH GCMD CEOS IDN DIF VERSION 9.0