Results 51 to 60 of about 9,504 (229)

The effect of a permafrost disturbance on growing-season carbon-dioxide fluxes in a high Arctic tundra ecosystem [PDF]

Biogeosciences, 2016
Soil carbon stored in high-latitude permafrost landscapes is threatened by warming and could contribute significant amounts of carbon to the atmosphere and hydrosphere as permafrost thaws.
A. E. Cassidy, A. Christen, G. H. R. Henry   +2 more
doaj   +1 more source

Quantifying the Surface Deformation of Pingos on the Alaskan North Slope Using Interferometric Synthetic Aperture Radar (InSAR)

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Pingos are large mounds with cores formed of intrusive ice that form in periglacial landscapes. These ice structures can form in regions of discontinuous permafrost, commonly as hydraulic or open‐system pingos, or in locations of continuous permafrost, commonly as hydrostatic or closed‐system pingos.
Venezia M. Follingstad, Roger J. Michaelides, Matthew R. Siegfried, Tyler M. Meng, John Bradford, Kynan H. G. Hughson, Alexia R. Kubas, Andrew Mullen, Enrica Quartini, Austin Routt, Hanna G. Sizemore, Andrei Swidinsky, Britney E. Schmidt   +12 more
wiley   +1 more source

A Strategy for Adapting the Hydraulic System of Woody Plants to Various Tiers of the Floodplain Forest of the Enmyvaam River (Chukotka)

Лесной журнал
The article examines the features of the anatomical structure of the hydraulic system of 17 species from 13 genera of 6 families of woody flowering plants, which belong to different tiers of the floodplain forest growing along the Enmyvaam River ...
Evgenia S. Chavchavadze, Roman V. Shchekalev, Alexander A. Grabovskiy, Veronika O. Romanova   +3 more
doaj   +1 more source

Dryas aeolian landforms in Arctic deflationary tundra, central Spitsbergen

Polish Polar Research, 2020
Aeolian activity is common on ice free areas in regions with permafrost occurrence. Sparse high-Arctic tundra vegetation, modifying surface air flow and sediments transport, influences the generation of individual landforms and their assemblages ...
Borysiak Janina, Pleskot Krzysztof, Rachlewicz Grzegorz   +2 more
doaj   +1 more source

CSRcalculator: A reproducible framework for understanding plant ecological strategies

PLANTS, PEOPLE, PLANET, EarlyView.
Understanding how plants respond to environmental change is essential for conserving biodiversity and managing ecosystems under climate change. We developed CSRcalculator, an open‐source platform that brings together major competitor, stress‐tolerator, ruderal (CSR) models to make ecological strategy classification accessible, reproducible and scalable.
Teddy Gaskin, Ben Crick, Manny Wright, Amanda P. Cavanagh, Katharina Huber, Zoran Nikoloski, John N. Ferguson   +6 more
wiley   +1 more source

Alder Distribution and Expansion Across a Tundra Hillslope: Implications for Local N Cycling

Frontiers in Plant Science, 2019
Increases in the availability of nitrogen (N) may have consequences for plant growth and nutrient cycling in N-limited tundra plant communities. We investigated the impact alder (Alnus viridis spp. fruticosa), an N-fixing deciduous shrub, has on tundra N
Verity G. Salmon, Amy L. Breen, Jitendra Kumar, Mark J. Lara, Mark J. Lara, Peter E. Thornton, Stan D. Wullschleger, Colleen M. Iversen   +7 more
doaj   +1 more source

Evaluating anisotropy‐based Monin–Obukhov similarity theory over canopies and complex terrain

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study shows that an anisotropy‐based generalization of Monin–Obukhov surface‐layer scaling (SC23) applies readily across a wide range of atmospheric conditions with variable terrain, canopies, and land‐cover complexity. This work focuses on the scaling of velocity variances for 7 years at the 47 sites in the National Ecological Observation Network
Tyler S. Waterman, Ivana Stiperski, Nathaniel Chaney, Marc Calaf   +3 more
wiley   +1 more source

Deeper snow increases the net soil organic carbon accrual rate in moist acidic tussock tundra: 210Pb evidence from Arctic Alaska

Arctic, Antarctic, and Alpine Research, 2020
The net change in the carbon inventory of arctic tundra remains uncertain as global warming leads to shifts in arctic water and carbon cycles. To better understand the response of arctic tundra carbon to changes in winter precipitation amount, we ...
Karyn C. DeFranco, Michael P. Ricketts, Elena Blanc-Betes, Jeffrey M. Welker, Miquel A. Gonzalez-Meler, Neil C. Sturchio   +5 more
doaj   +1 more source

Lacking data? No worries! How synthetic images can alleviate image scarcity in wildlife surveys: A case study with muskox (Ovibos moschatus)

Remote Sensing in Ecology and Conservation, EarlyView.
This study investigates the integration of synthetic imagery, created with diffusion‐based models, to supplement limited training data and improve muskox (Ovibos moschatus) detection in zero‐shot (ZS) and few‐shot (FS) settings. ZS models detected more than 80% of muskoxen in real images, confirming the potential of synthetic data as a substitute for ...
Simon Durand, Samuel Foucher, Alexandre Delplanque, Joëlle Taillon, Jérôme Théau   +4 more
wiley   +1 more source

Characterizing ICESat‐2 Snow Depths Over the Boreal Forests and Tundra of Alaska in Support of the SnowEx 2023 Campaign

Water Resources Research
Recent studies show that the Ice, Clouds, and Land Elevation Satellite‐2 (ICESat‐2) can achieve decimeter‐level accuracy over forested and mountainous sites in the western United States, as well as over the glaciers of Alaska.
Zachary Fair, Carrie Vuyovich, Thomas Neumann, Chrisopher F. Larsen, Svetlana Stuefer, Megan Mason, Lora May   +6 more
doaj   +1 more source