BOREAS TE-09: Diurnal Gas Exchange in NSA Forest Stands

From May 27 to September 17, 1994, this dataset provides in situ diurnal gas exchange and water potential measurements from the Boreal Ecosystem-Atmosphere Study Northern Study Area. It characterizes two canopy levels across five boreal cover types: young and old jack pine, old aspen, and lowland and upland black spruce. The data were collected to validate photosynthetic models, compare crown-level responses, and assess soil moisture limitations.

Use Cases

• Validating models of photosynthetic responses to light, temperature, and CO2 based on in situ gas exchange measurements.
• Comparing photosynthetic efficiency between upper and lower tree crown levels across different species.
• Characterizing diurnal water potential curves to infer soil moisture supply limitations to leaves.
• Analyzing species-specific gas exchange patterns for young and old jack pine, old aspen, and black spruce.

Strengths

• Data collection spans a defined seasonal period from May 27 to September 17, 1994.
• Measurements cover five distinct boreal canopy cover types and two canopy levels, providing comparative detail.
• The dataset is hosted on multiple platforms (datagov, nasa_earthdata), indicating recognized importance.

Limitations

• Column names and row counts are unknown across all sources, limiting precise structural understanding.
• License information is incomplete, with one source specifying 'other-license-specified' and another providing none.
• The most recent update date (2026-03-13) conflicts with the actual data collection period (1994), suggesting metadata may not reflect data freshness.

Provenance

Source

National Aeronautics and Space Administration (NASA) as part of the Boreal Ecosystem-Atmosphere Study (BOREAS).

Collection Method

In situ field measurements collected to characterize diurnal gas exchange and water potential.

Time Range

May 27, 1994 to September 17, 1994.

Freshness

Last metadata update was March 13, 2026 on datagov, but the data itself was collected in 1994.

Geography

BOREAS Northern Study Area (NSA), boreal forest region.