Oak Ridge National Laboratory Distributed Active Archive Center

nasa-ornldaac-927

LBA-ECO TG-07 Soil CO2 Flux by Automated Chamber, Para, Brazil: 2001-2003

ABSTRACT: The net ecosystem exchange of carbon dioxide was measured by eddy covariance methods for 3 years in two old-growth forest sites near Santarem, Brazil. Carbon was lost in the wet season and gained in the dry season, which was opposite to the seasonal cycles of both tree growth and model predictions. The 3-year average carbon loss was 1.3 (confidence interval: 0.0 to 2.0) megagrams of carbon per hectare per year. Biometric observations confirmed the net loss but imply that it is a transient effect of recent disturbance superimposed on long-term balance. Given that episodic disturbances are characteristic of old-growth forests, it is likely that carbon sequestration is lower than has been inferred from recent eddy covariance studies at undisturbed sites.

daac.ornl.gov

http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=927

Identified by : LBA_TG07_SCO2AC

This dataset was released on January 01, 2009.

The time range for this dataset is March 19, 2001 to May 05, 2003.

The spatial range for this dataset is -2.857° to -2.857° latitude, and -54.959° to -54.959° longitude. map

DOI : 10.3334/ORNLDAAC/927
Also known as :

• dataset oai:mercury-ops2.ornl.gov:ornldaac_927 (ornl lexicon)
• dataset oai:mercury.ornl.gov:ornldaac_927 (ornl lexicon)