BOREAS TE-23: Canopy Architecture Derived from Hemispherical Photos

42 CD-ROMs of hemispherical photographs were collected from OA, OBS, OJP, YJP, and YA sites in the boreal forest between May and August 1994. The BOREAS TE-23 team used these images to derive tabular data on Leaf Area Index, leaf angle, gap fraction, and clumping index. This dataset supports the characterization of canopy architecture and radiative transfer properties for the BOREAS study.

Use Cases

• Validating satellite-derived LAI estimates based on ground-based hemispherical photography.
• Modeling light interception and radiative transfer within boreal forest canopies based on gap fraction and clumping index.
• Studying seasonal changes in canopy structure from May to August 1994 based on the measurement time range.
• Comparing canopy architectural properties across different boreal forest site types (OA, OBS, OJP, YJP, YA).

Strengths

• Contains original source imagery stored across 42 CD-ROMs, providing a substantial primary data archive.
• Covers a specific and ecologically significant time range (May-August 1994) during the BOREAS campaign.
• Data is derived for key canopy architecture variables (LAI, leaf angle, gap fraction, clumping index) supporting quantitative analysis.

Limitations

• Critical metadata conflicts: one source lists a last update in 2026, while another indicates the data is from 1994, creating uncertainty about provenance.
• Column names and exact row counts are unknown, limiting precise understanding of the tabular data structure.
• The primary image data is stored in a legacy physical format (42 CD-ROMs), which may present access challenges.

Provenance

Source

BOREAS TE-23 team, National Aeronautics and Space Administration

Collection Method

Field collection of hemispherical photographs and subsequent derivation of canopy metrics.

Time Range

May 1994 - August 1994

Freshness

2026-04-10 05:49:19.725039

Geography

Boreal forest sites (OA, OBS, OJP, YJP, YA)