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LBA-ECO CD-02 Carbon and Oxygen Isotopes in Atmospheric CO2 in the Amazon: 1999-2004

Data Set Overview

Data setLBA-ECO CD-02 Carbon and Oxygen Isotopes in Atmospheric CO2 in the Amazon: 1999-2004
DOIhttps://doi.org/10.3334/ORNLDAAC/1011
Release date2011-05-12
ProjectLarge Scale Biosphere-Atmosphere Experiment (LBA-ECO)
Time period1999-03-01 to 2004-03-31

Usage Metrics

CountEarliest DateLatest DateData Usage
Downloads452011-12-222017-03-17129 total files downloaded

Description

This data set reports carbon and oxygen stable isotope ratios of atmospheric carbon dioxide (CO2) collected at several forest and pasture sites and in the free troposphere over Amazonia. There are three comma-delimited ASCII files with this data set. Atmospheric CO2 concentrations and isotope signatures were measured at ten different forest and pasture canopy sites across the states of Amazonas, Para, and Rondonia within the Brazilian Amazon between March 1999 and March 2004. Both daytime and nighttime profile samples were collected. Samples of CO2 in the troposphere were collected during aircraft flights over the Amazon/Tapajos Rivers, FLONA Tapajos, and pasture/agriculture areas during five days in May 2003 (wet season). Samples were analyzed for carbon and oxygen isotopes of atmospheric CO2. Flights ranged from low altitudes to above the diurnal tropospheric boundary layer. Measurements of carbon and oxygen stable isotope ratios of atmospheric carbon dioxide (CO2) are a powerful indicator of large-scale CO2 exchange on land across multiple spatial scales. Stable carbon isotope composition of leaf tissue and CO2 released by respiration (delta r) can be used as an estimate of changes in ecosystem isotopic discrimination that occur in response to seasonal and interannual changes in environmental conditions, and land-use change (forest-pasture conversion). Understanding of carbon dioxide stable isotope composition can play a central role in influencing our understanding of the extent to which terrestrial ecosystems are carbon sinks.

Data set documentation

Citation

Ehleringer, J.R., L.A. Martinelli, C. Cook, T.F. Domingues, L. Flanagan, J.A. Berry, and J.P.H.B. Ometto. 2011. LBA-ECO CD-02 Carbon and Oxygen Isotopes in Atmospheric CO2 in the Amazon: 1999-2004. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1011

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Data Files

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Data File (Granule)File SizeDatesLatitudeLongitude
CD02_Stable_Isotope_Air_Troposphere.csv 16.9KB 2003-05-26 - 2003-05-30 2.09N To 3.14S54.72E To 55.45W
CD02_Stable_Isotope_Air_Forest.csv 145.3KB 1999-03-01 - 2004-03-31 2.59N To 10.08S54.96E To 61.93W
CD02_Stable_Isotope_Air_Pasture.csv 46.5KB 1999-05-01 - 2004-03-31 1.00N To 10.76S54.58E To 62.36W

Companion Files

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Data set has 1 companion files.

  • CD02_Atmosphere_CO2_Isotopes.pdf