Photochemical Reflectance and Tree Growth in Brooks Range, Alaska, 2018-2019

29 white spruce trees were monitored along a 5.5 km transect in the Brooks Range of Alaska during the 2018 and 2019 growing seasons. The dataset provides simultaneous in-situ measurements of the photochemical reflectance index (PRI) and radial tree growth, collected at 5-minute intervals from May 1 to September 15. It was produced by the National Aeronautics and Space Administration to investigate the suitability of PRI for remotely tracking tree growth dynamics.

Use Cases

• Modeling the relationship between photochemical reflectance and radial tree growth based on simultaneous in-situ measurements.
• Analyzing seasonal growth patterns of white spruce at the northern treeline based on high-frequency dendrometer data.
• Developing remote sensing proxies for tree growth dynamics based on the photochemical reflectance index (PRI).
• Studying spatial variations in tree physiology along an environmental gradient based on data from six plots.

Strengths

• High temporal resolution with measurements collected at 5-minute intervals.
• Simultaneous collection of two key physiological variables (PRI and radial growth) on 29 trees.
• Data spans two full growing seasons from 2018 and 2019.
• Spatial context provided by a 5.5 km transect with six distinct plots.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Geographic scope is limited to a specific transect in the Brooks Range, Alaska.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

In-situ measurements from dendrometers and photochemical reflectance sensors.

Time Range

2018-05-01 to 2019-09-15

Freshness

Last updated 2026-03-12 19:47:43.831812; freshness should be verified.

Geography

Brooks Range, Alaska, south of Chandalar Shelf and Atigun Pass, east side of the Dalton Highway.