Results 91 to 100 of about 99,621 (296)

Predator density outweighs experimental warming effects on short‐term carbon and nitrogen loss from arctic shrub litter

Oikos, EarlyView.
Rapid climate change in the Arctic is altering biological communities and their subsequent effects on ecosystem functioning. For example, warming‐induced shrub expansion accelerates biogeochemical cycles in part by increasing high‐quality litter inputs.
Nevo Sagi, Anna M. Cress, Jennie R. McLaren, Amanda M. Koltz   +3 more
wiley   +1 more source

Temporal and spatial variation in active layer depth in the McMurdo Sound Region, Antarctica [PDF]

, 2010
A soil climate monitoring network, consisting of seven automated weather stations, was established between 1999 and 2003, ranging from Minna Bluff to Granite Harbour and from near sea level to about 1700m on the edge of the polar plateau.
Adlam, Leah Seree, Balks, Megan R., Campbell, David I., Seybold, Cathy A.   +3 more
core   +2 more sources

Interannual spectral consistency and spatial uncertainties in UAV‐based detection of boreal and subarctic mire plant communities

Remote Sensing in Ecology and Conservation, EarlyView.
UAVs provide high spatial resolution imagery to detect and assess the spatial complexity of peatland vegetation. We used interannual multispectral data from aapa and palsa mires in Finland to classify plant communities using Random Forest. Based on class membership probabilities, we generated maps showing the second most likely classes and an ...
Franziska Wolff, Tiina H. M. Kolari, Aleksi Räsänen, Teemu Tahvanainen, Pasi Korpelainen, Miguel Villoslada, Mariana Verdonen, Eliisa Lotsari, Yuwen Pang, Timo Kumpula   +9 more
wiley   +1 more source

Rapid Changes in Retrogressive Thaw Slump Dynamics in the Russian High Arctic Based on Very High‐Resolution Remote Sensing

Geophysical Research Letters
We used very high‐resolution satellite images to map the development of retrogressive thaw slumps (RTS) at six sites in the Russian High Arctic for the period 2011 to 2020.
S. Barth, I. Nitze, B. Juhls, A. Runge, G. Grosse   +4 more
doaj   +1 more source

Applying computer vision to accelerate monitoring and analysis of bird incubation behaviors: a case study using common eider nest camera footage

Remote Sensing in Ecology and Conservation, EarlyView.
Visualization of the pipeline is divided into two primary segments: automated (i.e., the user adapts the code directly to build a custom computer vision model) and human‐in‐the‐loop (i.e., the user manually evaluates the output of the model). In step 1, raw imagery data are selected for training and testing datasets; ideally, these datasets are ...
Lindsay Veazey, Christopher Latty, Zoey Chapman, Tuula E. Hollmen   +3 more
wiley   +1 more source

Policy implications of warming permafrost [PDF]

Permafrost is perennially frozen ground occurring in about 24% of the exposed land surface in the Northern Hemisphere. The distribution of permafrost is controlled by air temperature and, to a lesser extent, by snow depth, vegetation, orientation to ...

core  

Investigating boreal forest successional stages in Alaska and Northwest Canada using UAV‐LiDAR and RGB and a community detection network

Remote Sensing in Ecology and Conservation, EarlyView.
This study develops a novel application of UAV‐LiDAR and Red Green Blue (RGB) data and network analysis to enhance our understanding of boreal forest succession. The results indicate that tree height and spectral variables are the most influential predictors of plant functional type in random forest algorithms, and high overall accuracies were attained.
Léa Enguehard, Birgit Heim, Ulrike Herzschuh, Viktor Dinkel, Glenn Juday, Santosh Panda, Nicola Falco, Jacob Schladebach, Jakob Broers, Stefan Kruse   +9 more
wiley   +1 more source

Structural Flexibility of Water Frameworks: A Single Large Guest‐Inducing Structure‐H and Structure‐II Hydrate Structures

Small Structures, EarlyView.
A single large guest molecule induces the formation of both structure‐II and structure‐H hydrates, highlighting the structural flexibility of water frameworks. This unique coexistence of cubic and hexagonal clathrate structures not only provides new insights into hydrate phase behavior but also points to potential applications in gas storage and carbon
Yusuke Jin, Hiroshi Fujihisa, Masato Kida, Satoshi Takeya, Jiro Nagao   +4 more
wiley   +1 more source

Parallel Splitting and Decomposition Method for Computations of Heat Distribution in Permafrost [PDF]

, 2015
A mathematical model, numerical algorithm and program code for simulation and long-term forecasting of changes in permafrost as a result of operation of a multiple well pad of northern oil and gas field are presented.
Filimonov, M., Vaganova, N.
core  

Sensitivity of Permafrost

, 2010
Arctic permafrost may be adversely affected by climate change in a number of ways, so that establishing a world-wide monitoring program seems imperative. This thesis evaluates possibilities for permafrost monitoring at the example of a permafrost site on Svalbard, Norway.
openaire   +3 more sources