Soil Isotopic Carbon, Nitrogen, and N2O Data from Brazilian Forest

Soil and gas measurements from two sites in the Tapajos National Forest, Brazil, provide isotopic analyses of carbon, nitrogen, and oxygen, along with soil texture and bulk density. The dataset includes samples from various soil types and depths, collected in 2000 for soil and 2001-2002 for soil gas. It is provided by ORNL_CLOUD as a single comma-delimited ASCII file.

Use Cases

• Analyzing soil carbon and nitrogen isotopic signatures to trace nutrient sources and cycling processes.
• Correlating soil texture and bulk density with soil gas N2O concentrations and isotopic composition.
• Investigating spatial and vertical variation in soil water oxygen isotopes across different forest sites.
• Modeling soil carbon stocks and nitrogen availability in logged and primary tropical forest areas.
• Studying the relationship between total soil carbon/nitrogen concentrations and isotopic data.

Strengths

• Data includes multiple measurement types: isotopic analyses, concentrations, and physical properties for a holistic view.
• Samples were collected from specially constructed pits at various depths, providing vertical profile data.
• Cross-platform presence on NASA EarthData and Data.gov indicates recognized scientific importance.

Limitations

• Exact row count, file size, and complete column names are not provided by any source.
• Conflicting last update dates: one source reports 2002-03-23, while others report 2026-03-13, suggesting possible metadata errors.

Provenance

Source

ORNL_CLOUD

Collection Method

Samples collected from constructed pits at the km 83 Logged Forest Tower Site and km 67 Seca-Floresta Site.

Time Range

2000 to 2002

Freshness

2026-03-13 01:10:56.312766

Geography

Tapajos National Forest, near Santarem, Para, Brazil