Vegetation and snow phenology monitoring in the Arctic Network through 2020: Results from satellites and land-based cameras

Swanson DK. 2021. Vegetation and snow phenology monitoring in the Arctic Network through 2020: Results from satellites and land-based cameras. Natural Resource Report. NPS/ARCN/NRR—2021/2337. National Park Service. Fort Collins, Colorado. https://doi.org/10.36967/nrr-2288675

The Arctic Inventory and Monitoring Network of the National Park Service in Alaska monitors the length of the snow season and the growing season in the five northernmost US National Park units. Monitoring includes on-the-ground cameras at one location in each park (with data beginning in 2013), and satellite observations that cover all the parks using the MODIS sensor (with data beginning in the year 2000). Comparison of the on-the-ground camera observations with satellite determinations of start and end of the continuous snow season and start and end of the green vegetation season generally show good agreement, with the weakest correspondence between ground observations and end of the green season. The satellite data suggest significant lengthening of both the snow-free and green season over the 21-year period of observations. Application of our methods to data from the VIIRS satellite, which began recording data in 2012 and is expected to outlive MODIS, produced similar results for the start and end of the green season.

Type
Published Report
Authors
Swanson, David
Date of Issue
2021-12
Publisher
National Park Service
DOI
10.36967/nrr-2288675
Units
ARCN , NRSS
Keywords
arctic, phenology, snow, vegetation
Subjects
Ecological Framework: Air and Climate | Weather and Climate | Weather and Climate , Ecological Framework: Landscapes | Energy Flow | Primary Production

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