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Showing 1–8 of 8 results
Advanced filters: Author: Anna-Maria Virkkala Clear advanced filters

  • How the carbon stocks of the Arctic–Boreal Zone change with warming is not well understood. Here the authors show that wildfires and large regional differences in net carbon fluxes offset the overall increasing CO2 uptake.

    • Anna-Maria Virkkala
    • Brendan M. Rogers
    • Susan M. Natali
    ResearchOpen Access
    Nature Climate Change
    Volume: 15, P: 188-195

  • The future of carbon dynamics in the northern high latitudes is uncertain yet represents an important potential feedback under climate change. This study uses a comprehensive observational dataset to show an increasing carbon sink in non-permafrost systems; in permafrost systems uptake was offset by loss.

    • Craig R. See
    • Anna-Maria Virkkala
    • Edward A. G. Schuur
    ResearchOpen Access
    Nature Climate Change
    Volume: 14, P: 853-862

  • The Arctic is estimated to be a source of atmospheric methane but the sink capacity may be underestimated. This study shows that methane uptake in well-drained Arctic soils is driven by soil moisture and carbon availability, indicating a potential increased methane sink under climate change.

    • Carolina Voigt
    • Anna-Maria Virkkala
    • Oliver Sonnentag
    ResearchOpen Access
    Nature Climate Change
    Volume: 13, P: 1095-1104

  • Functional trait data could guide predictions of species responses to environmental change. Here, the authors show that winner and loser shrub species in the warming tundra biome overlap in trait space and may therefore be difficult to predict based on commonly measured traits.

    • Mariana García Criado
    • Isla H. Myers-Smith
    • Anna-Maria Virkkala
    ResearchOpen Access
    Nature Communications
    Volume: 14, P: 1-17

  • The northern high latitude permafrost region has been an important contributor to the carbon sink since the 1980s. A new study finds that as tree cover increases, respiratory CO2 loss during late-growing season offsets photosynthetic CO2 uptake and leads to a slower rate of increasing annual net CO2 uptake.

    • Zhihua Liu
    • John S. Kimball
    • Naveen Chandra
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-13

  • Changes in the seasonal cycle amplitude of atmospheric CO2 (SCA) reflect large-scale changes in the global carbon cycle. This Review summarizes the positive SCA trend in the northern high latitudes, where the signal is strongest, and explores the underlying mechanisms driving the trend and their relative importance.

    • Zhihua Liu
    • Brendan M. Rogers
    • Yangjian Zhang
    Reviews
    Nature Reviews Earth & Environment
    Volume: 5, P: 802-817