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LBA-ECO TG-07 Soil Trace Gas Flux and Root Mortality, Tapajos National Forest
Entry ID: LBA_TG07_STGFARM

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Summary
Abstract: We conducted an experiment on sand and clay tropical forest soils to test the short-term effect of root mortality on the soil-atmosphere flux of nitrous oxide, nitric oxide, methane, and carbon dioxide. We induced root mortality by isolating blocks of land to 1 m using trenching and root exclusion screening. Gas fluxes were measured weekly for ten weeks following the trenching treatment. For nitrous oxide there was a highly significant increase in soil-atmosphere flux over the ten weeks following treatment for trenched plots compared to control plots. N2O flux averaged 37.5 and 18.5 ng N cm-2 h-1 from clay trenched and control plots and 4.7 and 1.5 ng N cm-2 h-1 from sand trenched and control plots. In contrast, there was no effect for soil-atmosphere flux of nitric oxide, carbon dioxide, or methane.

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Description: LBA-ECO TG-07 Soil Trace Gas Flux and Root Mortality, Tapajos National Forest


Geographic Coverage
 N: -3.017 S: -3.017  E: -54.9707  W: -54.9707

Data Set Citation
Dataset Originator/Creator: KELLER, M.M.VARNER, R.K.
Dataset Title: LBA-ECO TG-07 Soil Trace Gas Flux and Root Mortality, Tapajos National Forest
Dataset Release Date: 2009
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/924
Online Resource: http://mercury.ornl.gov/ornldaac/#fq=fileID:924


Temporal Coverage
Start Date: 2000-06-04
Stop Date: 2001-05-15


Location Keywords
CONTINENT > SOUTH AMERICA > BRAZIL


Science Keywords
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >SURFACE TEMPERATURE >AIR TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC CHEMISTRY >CARBON AND HYDROCARBON COMPOUNDS >CARBON DIOXIDE    [Definition]
ATMOSPHERE >ATMOSPHERIC CHEMISTRY >CARBON AND HYDROCARBON COMPOUNDS >METHANE    [Definition]
ATMOSPHERE >ATMOSPHERIC CHEMISTRY >NITROGEN COMPOUNDS >NITROGEN OXIDES    [Definition]
ATMOSPHERE >ATMOSPHERIC CHEMISTRY >NITROGEN COMPOUNDS >NITROUS OXIDE    [Definition]
AGRICULTURE >SOILS >SOIL MOISTURE/WATER CONTENT    [Definition]
LAND SURFACE >SOILS >SOIL MOISTURE/WATER CONTENT    [Definition]
AGRICULTURE >SOILS >SOIL TEMPERATURE    [Definition]
LAND SURFACE >SOILS >SOIL TEMPERATURE    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
ENVIRONMENT
FARMING
GEOSCIENTIFIC INFORMATION


Platform
FIELD INVESTIGATION    [Information]
LABORATORY    [Information]


Instrument
Thermometers    [Information]
IRGA >Infrared Gas Analyzers    [Information]
GAS CHROMATOGRAPHS    [Information]
CHEMILUMINESCENCE
BALANCE    [Information]
TEMPERATURE PROBES    [Information]


Project
ESIP >Earth Science Information Partners Program    [Information]
EOSDIS >Earth Observing System Data Information System    [Information]
LBA-ECO >NASA's Component of the Large-scale Biosphere-Atmosphere Experiment in Amazonia    [Information]


Keywords
SOIL
GC-ECD
METHANE
NITRIC OXIDE
SOIL MOISTURE
NITROUS OXIDE
CARBON DIOXIDE
ROOT MORTALITY
TRACE GAS EXCHANGE


Data Set Progress
COMPLETE


Data Center
THE OAK RIDGE NATIONAL LABORATORY (ORNL) DISTRIBUTED ACTIVE ARCHIVE CENTER (DAAC)    [Information]
Data Center URL: http://daac.ornl.gov/
Dataset ID: 924

Data Center Personnel
Name: ORNL DAAC USER SERVICES OFFICE
Phone: (865) 574-7447
Email: uso at daac.ornl.gov
Contact Address:
ORNL DAAC User Services Office
Oak Ridge National Laboratory
City: Oak Ridge
Province or State: TN
Postal Code: 37831-6407
Country: USA


Personnel
M. M. KELLER
Role: TECHNICAL CONTACT


ORNL DAAC USER SERVICES OFFICE
Role: DIF AUTHOR
Phone: (865) 574-7447
Email: uso at daac.ornl.gov
Contact Address:
ORNL DAAC User Services Office
Oak Ridge National Laboratory
City: Oak Ridge
Province or State: TN
Postal Code: 37831-6407
Country: USA



Creation and Review Dates
DIF Creation Date: 2009-04-30
Last DIF Revision Date: 2013-08-27



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