Amazon Forest Soil Gas and Moisture Data from Rainfall Exclusion Experiment

Soil carbon dioxide, nitrous oxide, and volumetric water content measurements document a controlled drought experiment in the humid Amazon. Data from the Tapajos National Forest site spans December 1999 to June 2002, with samples collected every two to three months. This dataset was produced by the ORNL_CLOUD organization for the LBA-ECO project to study forest response to severe water stress.

Use Cases

• Analyzing the relationship between soil moisture (VWC) and greenhouse gas concentrations (CO2, N2O) under induced drought.
• Modeling the temporal dynamics of soil gas fluxes from bi-monthly to tri-monthly sampling over a 2.5-year period.
• Calibrating earth system models with observed soil response data from a major rainfall exclusion experiment.
• Studying the resilience of a primary Amazonian forest (Tapajos National Forest) to prolonged water stress.

Strengths

• Data originates from a well-documented, controlled field experiment (the LBA-ECO rainfall exclusion study).
• Provides a multi-year time series from December 1999 to June 2002, capturing seasonal and treatment effects.
• Simultaneously measures key soil variables: two greenhouse gases (CO2, N2O) and volumetric water content.

Limitations

• Key structural metadata is missing: row count, file size, and specific column names are not provided by any source.
• Conflicting 'last updated' dates exist between platforms (2002-06-14 vs. 2026-03 13), suggesting possible metadata errors.
• Sampling frequency is every two to three months, which may not capture short-term event-driven fluxes.

Provenance

Source

ORNL_CLOUD organization, LBA-ECO project.

Collection Method

Field measurements from a rainfall exclusion experiment at the km 67 Seca Floresta site.

Time Range

December 9, 1999 to June 14, 2002

Freshness

2026-03-13 01:01:23.082311

Geography

Tapajos National Forest, Brazil.