Soil Trace Gas Fluxes from a Brazilian Tropical Forest Site

Four years of manual soil trace gas flux measurements from an undisturbed Amazonian forest site. The dataset captures fluxes of carbon dioxide, methane, nitrous oxide, and nitric oxide alongside soil moisture and temperature, collected approximately twice monthly from January 2000 to April 2004. It was produced by the ORNL_CLOUD organization as part of the LBA-ECO project.

Use Cases

• Analyzing seasonal and interannual variability of CO2 and CH4 soil emissions using flux and soil moisture data.
• Correlating soil temperature with the production rates of nitrogen trace gases like N2O and NO.
• Validating process-based models of tropical forest soil respiration and nutrient cycling against in-situ chamber measurements.

Strengths

• Provides concurrent measurements for four climatically important trace gases (CO2, CH4, N2O, NO) over a 4-year period.
• Includes ancillary soil data like water-filled pore space and temperature, enabling analysis of environmental controls.
• Data collection occurred within the footprint of an established eddy flux tower (km 67), allowing for potential cross-validation.

Limitations

• Exact row count, column names, and file size are unspecified across all sources, limiting assessment of dataset scale.
• Conflicting 'last updated' dates (2004-04 vs. 2026-03) suggest potential metadata inconsistency between platforms.
• Manual, twice-monthly sampling provides discrete snapshots rather than continuous flux records.

Provenance

Source

ORNL_CLOUD / LBA-ECO project.

Collection Method

Manual chamber-based gas collection and soil sampling along established transects.

Time Range

January 2000 to April 2004

Freshness

2026-03-13 00:58:40.430781

Geography

Tapajós National Forest Seca-Floresta Site (km 67 tower footprint), Brazil.