LBA-ECO CD-10: Forest CO2 and H2O Eddy Fluxes and Profiles

Eddy fluxes of CO2 and H2O are measured at two tower levels, 58m and 47m, using closed-path Licor 6262 analyzers and Campbell CSAT3 sonic anemometers. A third analyzer measures an 8-level CO2/H2O concentration profile every 2 minutes and integrated canopy storage every 20 minutes. The dataset includes comprehensive meteorological data and features rigorous instrument control, with automatic zeroing every 2 to 20 hours and calibration with span gases at 325, 400, and 475 ppm every 6 hours.

Use Cases

• Quantifying net ecosystem exchange of CO2 based on eddy covariance measurements from two heights.
• Analyzing vertical concentration gradients of CO2 and H2O within a forest canopy using the 8-level profile data.
• Studying the relationship between carbon fluxes and meteorological drivers like PAR and net radiation.
• Validating the performance and stability of gas analyzer systems under controlled pressure and temperature conditions.

Strengths

• Features multi-level measurement with eddy covariance at two heights (58m and 47m) and an 8-level concentration profile.
• Implements a rigorous quality assurance protocol with automatic zeroing (every 2-20 hours) and calibration with three span gas concentrations (325, 400, 475 ppm) every 6 hours.
• Instrument conditions are precisely controlled, with Licor cells maintained at 500 torr and 48 degrees C.

Limitations

• Column names and a precise row count are not provided, limiting immediate understanding of the data structure.
• There is a significant conflict in dataset freshness, with one source listing a last update in 2006 and others in 2026, casting doubt on temporal coverage.
• The license is ambiguously specified as 'other-license-specified' without clear terms.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Measured via tower-mounted closed-path Licor 6262 analyzers and Campbell CSAT3 sonic anemometers.

Freshness

2026-04-10 (conflicting with a 2006 date from another source)

Geography

Tapajos National Forest, km 67 Tower Site (likely in the Brazilian Amazon as part of the LBA-ECO project).