CO2 and CH4 Flux from Amazon Wetlands, 2004-2006

Flux estimates for carbon dioxide and methane from two interfluvial wetland sites in Brazil's upper Negro River basin. The dataset provides daily and monthly calculations for diffusive and ebullitive fluxes across dry, seasonally flooded, and permanently flooded areas from February 2005 to January 2006, with hydrologic measurements extending from April 2004. Data was produced by ORNL_CLOUD using field measurements and synthetic aperture radar analysis from Radarsat images.

Use Cases

• Modeling regional wetland contributions to atmospheric greenhouse gas budgets using calculated CO2 and CH4 flux totals.
• Analyzing the relationship between water level changes (rising/falling) and ebullitive methane flux constants.
• Studying seasonal variation in gas emissions by comparing fluxes across permanently and seasonally flooded areas.
• Validating remote sensing estimates of flooded area with ground-based hydrologic measurements from April 2004 to January 2006.
• Correlating synthetic aperture radar-derived wetland area estimates with direct flux measurements.

Strengths

• Provides temporally detailed daily and monthly flux estimates over a full annual cycle from February 2005 to January 2006.
• Integrates direct field measurements with satellite remote sensing analysis from Radarsat images for area estimation.
• Distinguishes between diffusive and ebullitive flux mechanisms for both CO2 and CH4, and between permanently and seasonally flooded zones.

Limitations

• Specific column names, row counts, and file sizes are unknown across all sources.
• Conflict in 'last updated' metadata: one source lists 2006-01-31, while others list 2026-03-13.
• CH4 ebullitive flux is modeled using a constant based on water level change, not directly measured.

Provenance

Source

ORNL_CLOUD

Collection Method

Field measurements combined with analysis of synthetic aperture radar data from Radarsat images.

Time Range

2004-04 to 2006-01

Freshness

2026-03-13 01:15:44.933327

Geography

Cuini and Itu wetland sites in the interfluvial wetlands of the upper Negro River basin, Brazil.