Results 71 to 80 of about 843 (168)

Modelling the Sensitivity of Yukon River Biogeochemical Dynamics to Environmental and Chemical Drivers: Implications for Dissolved Organic Carbon

Hydrological Processes, Volume 40, Issue 4, April 2026.
We present a novel, process‐based, river model that effectively captures the interplay among hydrological, chemical, and soil parameters shaping riverine DOC transformations and reproduces observed DOC concentrations in the Yukon River. Sensitivity analysis highlights the importance of understanding the variability in DOC entering the headwater from ...
Amadini M. Jayasinghe, Georgina A. Gibson, Nicole Jeffery, Jaclyn Clement Kinney, Anastasia Piliouras   +4 more
wiley   +1 more source

Long-term decomposition of above- and below-ground tissue of two Arctic shrub species

Arctic Science
Arctic soils may become a major source of greenhouse gas emissions, as the climate changes. It is thus crucial to understand decomposition dynamics of permafrost soils, which are influenced by a myriad of abiotic and biotic factors including changing ...
Anne Ola, Jérôme Comte, Daniel Fortier, Florent Domine   +3 more
doaj   +1 more source

Impact of vegetation type on the content and spectroscopic properties of soil organic matter in the subalpine zone of the Bieszczady Mountains (Eastern Carpathians) [PDF]

Aims: This study aimed to define how vegetation affects the content and chemistry of soil organic matter (SOM) in topsoil (O and A) horizons under blueberry shrubs (Vaccinietum myrtilli), and tall-grass vegetation in the subalpine zone of the Bieszczady ...
Jelonkiewicz, Łukasz, Kramarczuk, Patrycja, Musielok, Łukasz, Nikorych, Volodymyr A., Stolarczyk, Mateusz, Szymański, Wojciech   +5 more
core   +2 more sources

ARCTIC PLANT COMMUNITIES RISE WITH TEMPERATURE Plant functional traits as a tool to predict global climate change [PDF]

, 2022
Global warming occurs at a rate at least three-fold in the arctic regions compared to the rest of the world. Here, plant community functional traits were assessed in response to experimental warming in three arctic areas of Fennoscandia (Latnajajure ...
Sundell, Helena
core  

Drivers of Dissolved Organic Matter Quality and Concentration in a Mountainous Subarctic Watershed, Yukon, Canada

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 4, April 2026.
Abstract Northern permafrost regions contain vast frozen stores of organic carbon that are vulnerable to thaw and mobilization. While considerable attention has been paid to carbon export from large Arctic rivers, gaps remain in characterizing dissolved organic matter (DOM) quality and export in permafrost influenced catchments that contain a mosaic of
Aliana C. Fristensky, Sean K. Carey
wiley   +1 more source

Landscape patterns of shrubification in the Siberian Low Arctic: A machine learning perspective

Journal of Ecology
Abstract Tundra shrub expansion is a central form of change in warming Arctic ecosystems, but the pace of shrubification varies across spatial scales, complicating efforts to understand its drivers and consequences. Here, we apply convolutional neural networks (CNNs)
Anna Derkacheva, Gerald V. Frost, Howard E. Epstein, Ksenia Ermokhina   +3 more
openaire   +1 more source

Holocene vegetation dynamics of circum-Arctic permafrost peatlands [PDF]

, 2023
Vegetation shifts in circum-Arctic permafrost peatlands drive feedbacks with important consequences for peatland carbon budgets and the extent of permafrost thaw under changing climate.
Fewster, RE, Ivanovic, RF, Jones, MC, Morris, PJ, Swindles, GT, Treat, CC   +5 more
core   +2 more sources

Dendrochronology and remote sensing reveal beaver occupancy and colonization dynamics in an expanding Arctic population

Ecosphere, Volume 17, Issue 3, March 2026.
Abstract The North American beaver (Castor canadensis) is expanding its distribution in the Arctic tundra. Due to the species' capacity to engineer ecosystems, they can transform surface water dynamics and biogeochemistry, permafrost stability, vegetation composition, and impact Indigenous subsistence practices.
Georgia M. Hole, Ulf Büntgen, Yannan Wang, Ben DeVries, Gareth Rees, Helen C. Wheeler   +5 more
wiley   +1 more source

Volatile Organic Compound Release During Litter Decomposition in the Arctic

Global Change Biology Communications, Volume 1, Issue 1, March 2026.
Volatile organic compound (VOC) emissions from Arctic litter decomposition decline over time and differ strongly between Cassiope tetragona and Salix arctica. The inter‐species differences and changes over time are greater than the effects of climate change treatments on litter VOC emissions.
Riikka Rinnan, Mira Skardhamar, Magnus Kramshøj, Tao Li, Sarah H. Svendsen, Toke Bang‐Andreasen, Lars H. Hansen, Thomas Holst   +7 more
wiley   +1 more source

Modeling Sub‐Grid Peatland Vegetation Dynamics in the ORCHIDEE‐PEAT Land Surface Model

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 3, March 2026.
Abstract Peatlands store about one‐third of total global soil carbon. Vegetation composition strongly regulates peatland carbon dynamics. Global warming and climate‐driven ecohydrological changes are expected to alter peatland vegetation composition, necessitating accurate simulation of vegetation dynamics to predict future fate of peatland carbon.
Chunjing Qiu, Philippe Ciais, Chenyu Bian, Liyang Liu, Bertrand Guenet, Dan Zhu, Xinyu Chen, Chengliuhui Fang, Jianyang Xia, Anna M. Peregon, Natalia P. Kosykh, Nina P. Mironycheva‒Tokareva, Jiří Dušek, Efrén López‐Blanco, Jingfeng Xiao, Xing Li, Ankur R. Desai, Eugénie Euskirchen, Colin Edgar, Joshua Ratcliffe, Matthias Peichl, Koffi Dodji Noumonvi, Krzysztof Fortuniak, Włodzimierz Pawlak, Annalea Lohila, Mika Korkiakoski, Mika Aurela, Aram Kalhori   +27 more
wiley   +1 more source