Oliver Sonnentag

Datos Biográficos

ID6571015
NOMBREOliver Sonnentag
NOMBRESOliver
APELLIDOSonnentag
FIRMASONNENTAG O
AFILIACIONESUniversité de Montréal
ORCID0000-0001-9333-9721
VERIFICADOSí
TOTAL DE OBRAS14
TOTAL DE CITAS4
TOTAL COMO AUTOR14
TOTAL COMO EDITOR0
PRIMER AÑO DE PUBLICACIÓN2017
AÑO MÁS RECIENTE DE PUBLICACIÓN2025
ÍNDICE H1

  • Record 2024 winter carbon emissions coincide with record warmth across boreal forest, tundra, and wetland ecosystems

    Open AccessGrant Falvo, Edward A G Schuur et al.ARTICLEEnvironmental Research Letters2025

    The warming Arctic could accelerate climate change as permafrost soil carbon is released as greenhouse gas emissions from boreal forest, tundra, and wetland ecosystems. Record climate conditions are increasingly common, with the 2023–2024 winter (September–April) documented as having the warmest land surface air temperatures on record for the Arctic region. However, corresponding impacts on ecosystem greenhouse gas fluxes typically take several y…

  • Hydrology controls thermokarst and alters carbon cycling and methane emissions in peatlands near the southern limit of permafrost

    Open AccessIan Shirley, Z A Mekonnen et al.ARTICLEEnvironmental Research Letters2025

    Permafrost peatlands store vast amounts of frozen carbon across northern landscapes. When ground ice melts, surface subsidence produces thermokarst landforms that expand wetlands at the edges of permafrost plateaus. Thermokarst represents an accelerating climate feedback, but uncertainties remain about how ground ice, hydrology, and vegetation interact to shape landscape change and carbon fluxes. We extended the process-based model ecosys to simu…

  • A boreal forest model benchmarking dataset for North America

    Open AccessBo Qu, Alexandre Roy et al.ARTICLEEnvironmental Research Letters2023

    Climate change is rapidly altering composition, structure, and functioning of the boreal biome, across North America often broadly categorized into ecoregions. The resulting complex changes in different ecoregions present a challenge for efforts to accurately simulate carbon dioxide (CO 2 ) and energy exchanges between boreal forests and the atmosphere with terrestrial ecosystem models (TEMs). Eddy covariance measurements provide valuable informa…

  • Oil and natural gas wells across the Nasa ABoVE domain

    Open AccessLouise Klotz, Oliver Sonnentag et al.ARTICLEEnvironmental Research Letters2023

    Arctic-boreal regions are experiencing major anthropogenic disturbances in addition to intensifying natural disturbance regimes as a consequence of climate change. Oil and natural gas (OG) activities are extensive in the Arctic-boreal region of western North America, a large portion of which is underlain by permafrost. The total number and distribution of OG wells and their potential fate remain unclear. Consequently, the collective impacts of OG…

  • Recent peat and carbon accumulation on changing permafrost landforms along the Mackenzie River valley, Northwest Territories, Canada

    Open AccessPénélope Germain Chartrand, Oliver Sonnentag et al.ARTICLEEnvironmental Research Letters2023

    Northwestern Canada is currently warming nearly four times faster than the global average, driving accelerated permafrost thaw and changes to ecosystem vegetation, hydrology and landscape structure across the landscape. While permafrost peatlands constitute a large carbon reservoir, there is no consensus yet on the direction and magnitude of changes to their vulnerable carbon balance. Here, we assessed changes in peatland ecosystems following per…

  • Disturbances in North American boreal forest and Arctic tundra

    Open AccessAdrianna Foster, Jonathan Wang et al.ARTICLEEnvironmental Research Letters2022

    Ecosystems in the North American Arctic-Boreal Zone (ABZ) experience a diverse set of disturbances associated with wildfire, permafrost dynamics, geomorphic processes, insect outbreaks and pathogens, extreme weather events, and human activity. Climate warming in the ABZ is occurring at over twice the rate of the global average, and as a result the extent, frequency, and severity of these disturbances are increasing rapidly. Disturbances in the AB…

  • Range shifts in a foundation sedge potentially induce large Arctic ecosystem carbon losses and gains

    Open AccessSalvatore R Curasi, Ned Fetcher et al.ARTICLEEnvironmental Research Letters2022

    Foundation species have disproportionately large impacts on ecosystem structure and function. As a result, future changes to their distribution may be important determinants of ecosystem carbon (C) cycling in a warmer world. We assessed the role of a foundation tussock sedge ( Eriophorum vaginatum ) as a climatically vulnerable C stock using field data, a machine learning ecological niche model, and an ensemble of terrestrial biosphere models (TB…

  • Evaluating photosynthetic activity across Arctic-Boreal land cover types using solar-induced fluorescence

    Open AccessRui Cheng, Troy S Magney et al.ARTICLEEnvironmental Research Letters2022

    Photosynthesis of terrestrial ecosystems in the Arctic-Boreal region is a critical part of the global carbon cycle. Solar-induced chlorophyll Fluorescence (SIF), a promising proxy for photosynthesis with physiological insight, has been used to track gross primary production (GPP) at regional scales. Recent studies have constructed empirical relationships between SIF and eddy covariance-derived GPP as a first step to predicting global GPP. However…

  • Soil respiration strongly offsets carbon uptake in Alaska and Northwest Canada

    Open AccessJennifer D Watts, Susan M Natali et al.ARTICLEEnvironmental Research Letters2021

    Soil respiration (i.e. from soils and roots) provides one of the largest global fluxes of carbon dioxide (CO 2 ) to the atmosphere and is likely to increase with warming, yet the magnitude of soil respiration from rapidly thawing Arctic-boreal regions is not well understood. To address this knowledge gap, we first compiled a new CO 2 flux database for permafrost-affected tundra and boreal ecosystems in Alaska and Northwest Canada. We then used th…

  • Shallow soils are warmer under trees and tall shrubs across Arctic and Boreal ecosystems

    Open AccessHeather Kropp, M M Loranty et al.ARTICLEEnvironmental Research Letters2020

    Soils are warming as air temperatures rise across the Arctic and Boreal region concurrent with the expansion of tall-statured shrubs and trees in the tundra. Changes in vegetation structure and function are expected to alter soil thermal regimes, thereby modifying climate feedbacks related to permafrost thaw and carbon cycling. However, current understanding of vegetation impacts on soil temperature is limited to local or regional scales and lack…

  • The biophysical climate mitigation potential of boreal peatlands during the growing season

    Open AccessManuel Helbig, J M Waddington et al.ARTICLEEnvironmental Research Letters2020

    Peatlands and forests cover large areas of the boreal biome and are critical for global climate regulation. They also regulate regional climate through heat and water vapour exchange with the atmosphere. Understanding how land-atmosphere interactions in peatlands differ from forests may therefore be crucial for modelling boreal climate system dynamics and for assessing climate benefits of peatland conservation and restoration. To assess the bioph…

  • Missing pieces to modeling the Arctic-Boreal puzzle

    Open AccessJoshua B Fisher, Daniel J Hayes et al.ARTICLEEnvironmental Research Letters2017

    NASA has launched the decade-long Arctic-Boreal Vulnerability Experiment (ABoVE). While the initial phases focus on field and airborne data collection, early integration with modeling activities is important to benefit future modeling syntheses. We compiled feedback from ecosystem modeling teams on key data needs, which encompass carbon biogeochemistry, vegetation, permafrost, hydrology, and disturbance dynamics. A suite of variables was identifi…

  • Warmer spring conditions increase annual methane emissions from a boreal peat landscape with sporadic permafrost

    Open AccessManuel Helbig, William L Quinton et al.ARTICLEEnvironmental Research Letters2017

    About a fifth of the global wetland methane emissions originate from boreal peatlands, which represent an important land cover type in boreal landscapes in the sporadic permafrost zone. There, rising air temperatures could lead to warmer spring and longer growing seasons, changing landscape methane emissions. To quantify the effect of warmer spring conditions on methane emissions of a boreal peat landscape in the sporadic permafrost zone of north…

  • Influence of Holocene permafrost aggradation and thaw on the paleoecology and carbon storage of a peatland complex in northwestern Canada

    Open AccessNicolas Pelletier, Julie Talbot et al.ARTICLEThe Holocene2017Citada por: 4Referencias: 4

    Permafrost in peatlands strongly influences ecosystem characteristics, including vegetation composition, hydrological functions, and carbon cycling. Large amounts of organic carbon are stored in permafrost peatlands in northwestern Canada. Their possible degradation into permafrost-free wetlands including thermokarst bogs may affect carbon (C) stocks, but the direction and magnitude of change are uncertain. Using peat core reconstructions, we cha…