Results 111 to 120 of about 3,398 (259)

Optical Remote Sensing of Glacier Characteristics: A Review with Focus on the Himalaya

Sensors, 2008
The increased availability of remote sensing platforms with appropriate spatial and temporal resolution, global coverage and low financial costs allows for fast, semi-automated, and cost-effective estimates of changes in glacier parameters over large ...
Roger G. Barry, Mark W. Williams, Adina E. Racoviteanu   +2 more
doaj  

Structural and Rheological Properties of Chitosan‐Biochar Composites Prepared With Waste Biomass‐Derived Biochar

Polymer Engineering &Science, EarlyView.
Chitosan dispersions containing biochar derived from vine pruning residue showed increasing shear stress and improved thermal stability with loading. Flow behavior was described by the Bingham plastic model in all cases. These results support the valorization of agricultural waste in functional biopolymer formulations.
Ahmet Eser, Mehmet Sadrettin Zeybek, Mertcan Öksüz, Kamil Şirin   +3 more
wiley   +1 more source

Monitoring the physical processes driving the mass loss of Tapado Glacier, Dry Andes of Chile

Journal of Glaciology
We summarise 15 years of field and remote monitoring of Tapado Glacier in north-central Chile (30° S). Observations include meteorological records, direct mass balance measurements, uncrewed aerial vehicle surveys and tri-stereo satellite imagery for ...
Álvaro Ayala, Benjamin Robson, Gonzalo Navarro, Shelley MacDonell, Christophe Kinnard, Sebastián Vivero, Daniel Thomas, Felipe Moreno, Eduardo Yáñez, Nicole Schaffer, Alexis Segovia, Michał Pętlicki, Franco Retamal, Simone Schauwecker, Gino Casassa   +14 more
doaj   +1 more source

Disposition Model for Permafrost Degradation in Mountainous Regions

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Permafrost is a widespread thermal phenomenon in Arctic and high mountain regions that, in combination with steep terrain, exerts a key control on slope stability. Its degradation in response to climatic warming can modify the likelihood and timing of rockfall, debris flow and related mass movements. Robust information on the current state and
Peter Mani, Simon Allen, Mathias Bavay, Nils Hählen, Markus Stoffel   +4 more
wiley   +1 more source

Evaluating Testability of Permafrost Models Through Physical and Thermal Testing in Complex Mountain Terrain, Yukon, Canada

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Due to its subsurface nature, permafrost cannot be directly observed with the naked eye or optical remote sensing. Consequently, accurately describing its distribution and thermal state is challenging. This is especially true in vast, remote environments, where obtaining comprehensive field data is demanding or improbable.
Ria Nicholson, Philip P. Bonnaventure, Nick C. Noad, Madeleine C. Garibaldi, Rabecca Thiessen, Will Kochtitzky   +5 more
wiley   +1 more source

Internal Structure, Kinematics, and Prehistory of Frozen Debris Lobe‐A (FDL‐A), Brooks Range, Alaska

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Frozen Debris Lobe‐A (FDL‐A)—one of hundreds of FDLs in the Brooks Range of northern Alaska—is a slow‐moving landslide in permafrost that has been the subject of research since 2008 due to its close proximity to the Dalton Highway. Here, we synthesize more than a decade's worth of climate and surface measurements of monitored FDLs, and the ...
Margaret M. Darrow, Esther L. Babcock, Ben A. Leshchinsky   +2 more
wiley   +1 more source

Internal Permafrost Structure of Geomorphologically Distinct Palsas in Northern Sweden Revealed by Quasi‐3D ERT

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Permafrost in northern peatlands occurs within individual palsas or extensive peat plateaus and controls local carbon storage. These permafrost landforms are complex, and their internal structure remains poorly understood. We used quasi‐3D electrical resistivity tomography (ERT) measurements, supported by UAV‐LiDAR topography, frost probing ...
Cas Renette, Mirko Pavoni, Mauricio Fuentes, Erik Sturkell, Mats Olvmo, Heather Reese   +5 more
wiley   +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

Animating blossom: Time‐lapse to encourage plant awareness in the YouTube era

PLANTS, PEOPLE, PLANET, EarlyView.
Time‐lapse videos can effectively capture key traits of flower blossoms, such as color, 3D structure, and temporal changes, making them valuable complements to herbarium specimens and other botanical collections. Despite the abundance of such videos on YouTube, most provide no ecological and botanical insights.
Tae Kyung Yoon
wiley   +1 more source

Stability studies of cynaropicrin–major sesquiterpene lactone of Cynara cardunculus leaves

Pest Management Science, EarlyView.
This study investigated its stability under high temperature and pH, mimicking agronomic extremes and under soil context. Bioassays demonstrated that degradation products exhibited higher phytotoxic activity than cynaropicrin and deacylcynaropicrin. This is the first study about cynaropicrin's stability, characterizing degradation products, and their ...
Daniela Rosa, Carlos Rial, José MG Molinillo, Alejandro Sampalo, Rosa M Varela, Francisco A Macías, Maria F Duarte   +6 more
wiley   +1 more source