LBA-ECO TG-08: Soil Gas Fluxes from Wetted Amazon Soils

Soil gas flux measurements of nitric oxide (NO), nitrous oxide (N2O), and carbon dioxide (CO2) were taken in response to a simulated rain event in the Brazilian Amazon. The study compares mature forests with pastures of two ages (11 and 26 years old) to investigate short-term dynamics of emissions after prolonged dryness. Data includes soil moisture, soil temperature, and soil pools of ammonium and nitrate from a dry season study in August 1998 at Fazenda Nova Vida, Rondonia.

Use Cases

• Modeling short-term pulses of N2O and NO emissions following rain events based on soil moisture and temperature data.
• Comparing the impact of pasture age on soil nitrogen cycling and trace gas fluxes.
• Quantifying the contribution of wetting-induced flux pulses to dry season and annual greenhouse gas budgets from Amazonian soils.

Strengths

• Data captures a controlled, simulated rain event allowing for analysis of short-term dynamics.
• Includes measurements from multiple land-use types (mature forest, 11-year-old pasture, 26-year-old pasture).
• Measures multiple related variables (gas fluxes, soil moisture, temperature, nutrient pools) for integrated analysis.

Limitations

• Key metadata such as row count, column names, and exact file size are unavailable across all sources.
• There is a conflict in reported last update dates between 1999 and 2026, suggesting potential metadata inconsistency.
• The license is specified only as 'other-license-specified', requiring further investigation for reuse.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Field measurements from a simulated rain event experiment.

Time Range

August 1998

Freshness

Last updated metadata varies: 1999-08-23 on nasa_earthdata and 2026-04-10 on datagov.

Geography

Fazenda Nova Vida, Rondonia, Brazilian Amazon