Cited by 184Remote Sensing in AgriculturePlant Water Relations and Carbon DynamicsClimate change and permafrost

Satellite observations document trends consistent with a boreal forest biome shift

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Berner, Logan T., Goetz, Scott J.·2022·Global Change Biology

Abstract

The boreal forest biome is a major component of Earth's biosphere and climate system that is projected to shift northward due to continued climate change over the coming century. Indicators of a biome shift will likely first be evident along the climatic margins of the boreal forest and include changes in vegetation productivity, mortality, and recruitment, as well as overall vegetation greenness. However, the extent to which a biome shift is already underway remains unclear because of the local nature of most field studies, sparsity of systematic ground‐based ecological monitoring, and reliance on coarse resolution satellite observations. Here, we evaluated early indicators of a boreal forest biome shift using four decades of moderate resolution (30 m) satellite observations and biogeoclimatic spatial datasets. Specifically, we quantified interannual trends in annual maximum vegetation greenness using an ensemble of vegetation indices derived from Landsat observations at 100,000 sample sites in areas without signs of recent disturbance. We found vegetation greenness increased (greened) at 38 [29, 42] % and 22 [15, 26] % of sample sites from 1985 to 2019 and 2000 to 2019, whereas vegetation greenness decreased (browned) at 13 [9, 15] % and 15 [13, 19] % of sample sites during these respective periods [95% Monte Carlo confidence intervals]. Greening was thus 3.0 [2.6, 3.5] and 1.5 [0.8, 2.0] times more common than browning and primarily occurred in cold sparsely treed areas with high soil nitrogen and moderate summer warming. Conversely, browning primarily occurred in the climatically warmest margins of both the boreal forest biome and major forest types (e.g., evergreen conifer forests), especially in densely treed areas where summers became warmer and drier. These macroecological trends reflect underlying shifts in vegetation productivity, mortality, and recruitment that are consistent with early stages of a boreal biome shift.

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  1. Guindon, L., Villemaire, P., St‐Amant, R., Bernier, P. Y., Beaudoin, A., Caron, F., … Dorion, H. (2017). Canada Landsat Disturbance (CanLaD): a Canada‐wide Landsat‐based 30‐m resolution product of fire and harvest detection and attribution since 1984. 10.23687/add1346b-f632-4eb9-a83d-a662b38655ad · DOI
  2. IPCC (2021). Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on. Cambridge University Press.
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Authors
Berner, L. T., & Goetz, S. J.
Affiliations
Northern Arizona University (US)
Corresponding author
Berner, Logan T.
Venue
Global Change Biology
Publisher
Wiley
Published
2022-02-24
Volume
28
Issue
10
Pages
3275-3292
ISSN
  • 1354-1013 (ISSN-L)
  • 1365-2486
OpenAlex
W4213443373
Cited by
182
References
131
Citations by year
2026: 33 · 2025: 49 · 2024: 47 · 2023: 41 · 2022: 12
FWCI
19.85
Type
journal article
Language
en
Open access
Locations
  • Global Change Biology (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Funders
National Aeronautics and Space Administration (80NSSC19M0112, NNX17AE13G, NNX17AE44G)
Topics
  • Physical Sciences › Environmental Science › Ecology › Remote Sensing in Agriculture
  • Physical Sciences › Environmental Science › Global and Planetary Change › Plant Water Relations and Carbon Dynamics
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Climate change and permafrost
Keywords
vegetation greenness, climate change, biogeoclimatic zones, summer warming, soil nitrogen, vegetation productivity
MeSH terms
Trees, Ecosystem, Climate Change, Forests, Taiga

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