SAFARI 2000 Canopy Structure and LAI Measurements for Kalahari Transect

Five sites along the Kalahari Transect provide measurements of plant area index, leaf area index, gap fraction, and clumping index. Data were collected using the TRAC instrument along three 750-meter transects per site, with measurements taken every 25 meters at a 32 Hz sampling rate. The dataset was created by ORNL_CLOUD for the SAFARI 2000 campaign, with primary collection during the 2000 wet season and extended monitoring at the Mongu site from 1999 through 2000.

Use Cases

• Validating MODIS 1km pixel estimates of Leaf Area Index (LAI) and canopy clumping using ground-based transect measurements.
• Analyzing seasonal dynamics of canopy structure (PAI, LAI, gap fraction) across a precipitation gradient in southern African savannas.
• Studying the relationship between transmitted Photosynthetically Active Radiation (PAR) and canopy architectural parameters like clumping index.
• Providing ground truth for models linking canopy light interception to vegetation function in semi-arid ecosystems.

Strengths

• Spatial sampling designed for satellite validation, with three 750m transects per site to represent a 1 km MODIS pixel.
• High-frequency (32 Hz) continuous measurement of PAR flux enables detailed characterization of canopy light transmission.
• Temporal coverage includes the 2000 wet season campaign and extended monthly monitoring at Mongu from August 1999 through 2000.

Limitations

• Specific column names, row counts, and total file size are not provided by any source platform.
• Conflicting last update dates exist: one source lists 2000-12-19, while others list 2026 03-12, suggesting a metadata refresh conflict.

Provenance

Source

ORNL_CLOUD, collected as part of the SAFARI 2000 campaign.

Collection Method

Ground-based measurements with the TRAC instrument carried along parallel transects.

Time Range

1999-08 to 2000-12

Freshness

2026-03-12 22:16:46.489173

Geography

Five sites along the IGBP Kalahari Transect: Mongu (Zambia); Pandamatenga, Maun, Okwa River Crossing, Tshane (Botswana).