CO2 and H2O Eddy Flux Data from Amazon Tower Site

Four years of eddy flux measurements from January 2002 through January 2006 document carbon dioxide and water vapor exchange in a primary Amazon rainforest site. The data were collected by researchers from Harvard University and ORNL using tower-mounted gas analyzers and sonic anemometers at two heights. A companion Ph.D. thesis by Hutyra (2007) provides detailed analysis of carbon and water exchange processes.

Use Cases

• Modeling net ecosystem exchange of CO2 using eddy flux measurements averaged over hourly intervals.
• Analyzing water vapor flux profiles with concentration data from 8 vertical levels in and above the canopy.
• Studying micro-meteorology with co-located measurements of air temperature, pressure, PAR, net radiation, and precipitation.
• Investigating integrated canopy storage of CO2 and H2O using simultaneous sampling from 8 inlets every 20 minutes.

Strengths

• Provides a multi-year time series from 2002-2006, enabling analysis of seasonal and interannual variability.
• Includes detailed vertical profiling with CO2 and H2O concentration measurements at 8 distinct canopy levels.
• Uses high-frequency (8 Hz) sampling for eddy flux calculations, averaged to reliable 1-hour intervals.

Limitations

• Key metadata such as row count, file size, and complete column list are unavailable across all sources.
• Conflicting last-updated dates exist between platforms (2006-01-18 and 2026-03-13), obscuring data currency.

Provenance

Source

ORNL_CLOUD organization, with data originating from the LBA-ECO project.

Collection Method

Field measurements using tower-mounted closed-path Licor 6262 gas analyzers and Campbell CSAT3 sonic anemometers.

Time Range

January 2002 through January 2006

Freshness

2026-03-13 01:16:46.447279

Geography

Para Western (Santarem) - km 67, Primary Forest Tower Site, Tapajos National Forest, north central Brazil.