[Parameters: Topic='BIOSPHERE', Term='VEGETATION', Variable_Level_1='VEGETATION COVER']
NET CARBON DIOXIDE AND WATER FLUXES OF GLOBAL TERRESTRIAL ECOSYSTEMS, 1969-1998Entry ID: fluxnet_buchmann
Abstract: The variability of net surface carbon assimilation (Asmax), net ecosystem surface respiration (Rsmax), and net surface evapotranspiration (Etsmax) among and within vegetation types was examined based on a review of studies performed in either a micrometeorological setting or an enclosure setting. The majority of studies involved forests and C3 crops, particularly in the northern hemisphere; ... however, studies on tropical forests, C4 grasslands or wetlands were included. Data are presented for 133 published studies, although individual studies may not have measure all variables of interest.Despite large variations within a vegetation type, enclosure studies tended to give highest Asmax rates compared to micrometeorological techniques (Buchmann and Schulze 1999). Excluding enclosure studies, the investigators tested the effect of stand age and leaf area index (LAI) on net ecosystem gas exchange. The results from these analyses illustrate where gaps in scientific knowledge exist and how ecosystem properties affect the capacity of net ecosystem gas exchange.The information was collected from papers with publication dates from 1969-1998. Mean maximum flux rates for the period chosen by the authors were used instead of absolute maximum values for flux rates. Positive values stand for CO2 uptake by the vegetation and negative values represent CO2 release from the ecosystem. More information about the compilation can be found in Buchmann and Schultze (1999) or the individual studies cited in the data table.
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Data Set Citation
Dataset Originator/Creator: BUCHMANN, N.SCHULZE, E.-D.
Dataset Title: NET CARBON DIOXIDE AND WATER FLUXES OF GLOBAL TERRESTRIAL ECOSYSTEMS, 1969-1998
Dataset Release Date: 2003
Dataset Release Place: Oak Ridge, Tennessee, U.S.A.
Dataset Publisher: Oak Ridge National Laboratory Distributed Active Archive Center
Data Presentation Form: Online Files
Dataset DOI: doi:10.3334/ORNLDAAC/662Online Resource: http://mercury.ornl.gov/ornldaac/send/query?term2=662&term2attribut...
Start Date: 1969-01-01Stop Date: 1998-01-01
ISO Topic Category
Data Set Progress
Role: TECHNICAL CONTACT
Phone: ++49/3641/57 61 70
Fax: ++49/3641/57 78 63
Email: nina.buchmann at bgc-jena.mpg.de
Max-Planck-Institute for Biogeochemistry Postbox 10 01 64 - 07701 Jena
Role: DIF AUTHOR
Phone: (865) 574-7447
Email: uso at daac.ornl.gov
ORNL DAAC User Services Office Oak Ridge National Laboratory
City: Oak Ridge
Province or State: TN
Postal Code: 37831-6407
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2003-04-09
Last DIF Revision Date: 2012-03-15