SHIFT: Photosynthetic and Leaf Traits, Santa Barbara County, 2022

NASA's 2022 SHIFT campaign collected paired leaf images and physical measurements from three California reserves over a seven-month period. The dataset includes plot-level calculations for leaf area, mass, water content, and chlorophyll, intended for validating remote sensing products. Associated Python code and image scans allow for reproduction of the leaf area calculations.

Use Cases

• Validating satellite-derived vegetation indices based on ground-truth leaf area and chlorophyll measurements.
• Modeling plant water use efficiency and stress using leaf water content and mass per area data.
• Training computer vision algorithms for leaf area estimation from scanned images.
• Studying seasonal trait variation in meadow, shrub, and tree species across a California landscape.
• Benchmarking ecological process models with empirical leaf trait data.

Strengths

• Includes raw image scans alongside derived tabular data, enabling methodological transparency.
• Provides Python processing code for leaf area calculation, supporting reproducibility.
• Covers three distinct plant community types (meadow, shrub, tree) across three nature reserves.
• Contains a seven-month time series from February to September 2022, capturing seasonal variation.

Limitations

• Column names and exact row counts are unspecified across all platform entries.
• License is ambiguously listed as 'other-license-specified' on Data.gov without further detail.
• Metadata freshness conflicts: one platform shows a last update in 2026, while another shows 2022.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Field collection of leaf samples from plots, followed by laboratory weighing, scanning, and pigment analysis.

Time Range

February 23, 2022 to September 27, 2022

Freshness

2026-04-09 (from Data.gov, though this may be a metadata refresh; data collection ended in 2022)

Geography

Plots within the Dangermond Preserve, Sedgwick Reserve, and Carpinteria Salt Marsh Reserve in Santa Barbara County, California, USA.