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An Object-Based Approach for Mapping Tundra Ice-Wedge Polygon Troughs from Very High Spatial Resolution Optical Satellite Imagery

Chandi Witharana, Md Abul Ehsan Bhuiyan, Anna K. Liljedahl, Mikhail Kanevskiy, Torre Jorgenson, Benjamin M. Jones, Ronald Daanen, Howard E. Epstein, Claire G. Griffin, Kelcy Kent, Melissa K. Ward Jones
2021 Remote Sensing  
The central objective of this exploratory study is to develop an object-based image analysis workflow to automatically extract ice-wedge polygon troughs from very high spatial resolution commercial satellite  ...  Very high spatial resolution commercial satellite imagery can inform observation, mapping, and documentation of micro-topographic transitions across large tundra regions.  ...  We selected two candidate commercial satellite scenes from the North Slope of Alaska ( Figure 1 ) representing two distinct tundra vegetation units.  ... 
doi:10.3390/rs13040558 fatcat:4io2dqf5rjfsriwx5zubmqmn6m

Deep Convolutional Neural Networks for Automated Characterization of Arctic Ice-Wedge Polygons in Very High Spatial Resolution Aerial Imagery

Weixing Zhang, Chandi Witharana, Anna Liljedahl, Mikhail Kanevskiy
2018 Remote Sensing  
Our findings show that the Mask R-CNN is a robust method to automatically identify ice-wedge polygons from fine-resolution optical imagery.  ...  In this exploratory study, we tasked a deep-learning driven object instance segmentation method (i.e., the Mask R-CNN) with delineating and classifying ice-wedge polygons in very high spatial resolution  ...  Acknowledgments: The imagery was supported by Alaska EPSCoR U.S. National Science Foundation's award #OIA-1208927 and the State of Alaska.  ... 
doi:10.3390/rs10091487 fatcat:7nortqdfyfcftelnm35ag7yxby

UAV photogrammetry for mapping vegetation in the low-Arctic

Robert H. Fraser, Ian Olthof, Trevor C. Lantz, Carla Schmitt
2016 Arctic Science  
Based on these findings, we conclude that UAV photogrammetry provides a promising, cost-efficient method for high-resolution mapping and monitoring of tundra vegetation that can be used to bridge the gap  ...  Plot-scale field measurements are necessary to monitor changes to tundra vegetation, which has a small stature and high spatial heterogeneity, while satellite remote sensing can be used to track coarser  ...  Acknowledgements Funding for this project was provided by Polar Knowledge Canada (POLAR) under project 1516-121, an NSERC Discovery Grant (Lantz), and logistical support from the Polar Continental Shelf  ... 
doi:10.1139/as-2016-0008 fatcat:7svis3n56jcznf36feapngwnsa

Regional Patterns and Asynchronous Onset of Ice-Wedge Degradation since the Mid-20th Century in Arctic Alaska

Gerald Frost, Tracy Christopherson, M. Jorgenson, Anna Liljedahl, Matthew Macander, Donald Walker, Aaron Wells
2018 Remote Sensing  
We used a spectral thresholding approach validated by field observations to map flooded thaw pits in high-resolution images from circa 1950, 1982, and 2012 for 11 study areas (1577–4460 ha).  ...  Ice-wedge polygons are widespread and conspicuous surficial expressions of ground-ice in permafrost landscapes.  ...  Imagery for 2009-2012 comes from several commercial multi-spectral satellites with a 2-m spatial resolution; we sought multiple summer images for the late period, but the short snow-free season, high cloud  ... 
doi:10.3390/rs10081312 fatcat:yoz2ucq6gjfe7h356knkd3katm

Transferability of the Deep Learning Mask R-CNN Model for Automated Mapping of Ice-Wedge Polygons in High-Resolution Satellite and UAV Images

Weixing Zhang, Anna K. Liljedahl, Mikhail Kanevskiy, Howard E. Epstein, Benjamin M. Jones, M. Torre Jorgenson, Kelcy Kent
2020 Remote Sensing  
aircraft to automatically characterize ice-wedge polygons (IWPs) in the Arctic tundra.  ...  State-of-the-art deep learning technology has been successfully applied to relatively small selected areas of very high spatial resolution (0.15 and 0.25 m) optical aerial imagery acquired by a fixed-wing  ...  Satellite imagery © [2015] DigitalGlobe, Inc. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs12071085 fatcat:2wbiitl6fzbd5m35aicnb4yfxm

Tundra landform and vegetation productivity trend maps for the Arctic Coastal Plain of northern Alaska

Mark J. Lara, Ingmar Nitze, Guido Grosse, A. David McGuire
2018 Scientific Data  
distribution of patterned ground or polygonal tundra geomorphology are largely unavailable.  ...  These datasets can be easily integrated and adapted in an array of local to regional applications such as (1) upscaling plot-level measurements (e.g., carbon/energy fluxes), (2) mapping of soils, vegetation  ...  We thank Philip Martin for initial discussions that lead to the conceptualization of the polygonal tundra map.  ... 
doi:10.1038/sdata.2018.58 pmid:29633984 pmcid:PMC5892374 fatcat:bkfbz4olo5gzdjk7l2wwxres3i

Arctic Tundra Land Cover Classification on the Beaufort Coast Using the Kennaugh Element Framework on Dual-Polarimetric TerraSAR-X Imagery

Willeke A'Campo, Annett Bartsch, Achim Roth, Anna Wendleder, Victoria S. Martin, Luca Durstewitz, Rachele Lodi, Julia Wagner, Gustaf Hugelius
2021 Remote Sensing  
The results of this study demonstrate that multi-temporal Kennaugh elements derived from dual-polarized X-band imagery are a powerful tool for Arctic tundra land cover mapping.  ...  Synthetic Aperture Radar (SAR) imagery is specifically suitable for monitoring the Arctic, as SAR, unlike optical remote sensing, can provide time series regardless of weather and illumination conditions  ...  Many thanks to Ian Brown (Stockholm University) for his feedback and comments on an earlier version of this manuscript.  ... 
doi:10.3390/rs13234780 fatcat:royveegzwvehvpbhn7ftjgvnlq

Modeling the spatiotemporal variability in subsurface thermal regimes across a low-relief polygonal tundra landscape

Jitendra Kumar, Nathan Collier, Gautam Bisht, Richard T. Mills, Peter E. Thornton, Colleen M. Iversen, Vladimir Romanovsky
2016 The Cryosphere  
Ice-wedge polygons in the low-gradient polygonal tundra create a complex mosaic of microtopographic features.  ...  We present here an end-to-end effort for high-resolution numerical modeling of thermal hydrology at real-world field sites, utilizing the best available data to characterize and parameterize the models  ...  license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States government purposes.  ... 
doi:10.5194/tc-10-2241-2016 fatcat:latjuh3fuvb7vacrqgqfydnc4i

Modeling the spatio-temporal variability in subsurface thermal regimes across a low-relief polygonal tundra landscape

Jitendra Kumar, Nathan Collier, Gautam Bisht, Richard T. Mills, Peter E. Thornton, Colleen M. Iversen, Vladimir Romanovsky
2016 The Cryosphere Discussions  
Ice-wedge polygons in the low-gradient polygonal tundra create a complex mosaic of microtopographic features.  ...  We present here an end-to-end effort for high resolution numerical modeling of thermal hydrology at real-world field sites, utilizing the best available data to characterize and parameterize the models  ...  license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States government purposes.  ... 
doi:10.5194/tc-2016-29 fatcat:65deoq73gnegbgmikoedx5kxv4

Characterizing Post-Drainage Succession in Thermokarst Lake Basins on the Seward Peninsula, Alaska with TerraSAR-X Backscatter and Landsat-based NDVI Data

Prajna Regmi, Guido Grosse, Miriam Jones, Benjamin Jones, Katey Anthony
2012 Remote Sensing  
In this study, we tested the application of high-resolution X-band Synthetic Aperture Radar (SAR) data of the German TerraSAR-X satellite from the 2009 growing season (July-September) for characterizing  ...  Remote sensing is a tool useful for understanding temporal and spatial dynamics of drained basins.  ...  We thank the US National Park Service for permitting our research in Bering Land Bridge National preserve and providing Ikonos imagery. We  ... 
doi:10.3390/rs4123741 fatcat:yclilrmrhvg65hwks2udos5qb4

New ground ice maps for Canada using a paleogeographic modelling approach

H. Brendan O'Neill, Stephen A. Wolfe, Caroline Duchesne
2019 The Cryosphere  
The modelling uses an expert-system approach in a geographic information system (GIS), founded in conceptual principles gained from empirically based research, to predict ground ice abundance in near-surface  ...  The fundamental ground ice mapping for Canada is now <span class="inline-formula">&amp;gt;20</span> years old and does not include significant new insights gained from recent field- and remote-sensing-based  ...  We thank Mikhail Kanevskiy and Michel Allard for their helpful and constructive reviews and editor Christian Beer for his comments that helped improve the paper.  ... 
doi:10.5194/tc-13-753-2019 fatcat:aulfti4eyrff7mjjhzvdluxuj4

Mapping Arctic Tundra Vegetation Communities Using Field Spectroscopy and Multispectral Satellite Data in North Alaska, USA

Scott Davidson, Maria Santos, Victoria Sloan, Jennifer Watts, Gareth Phoenix, Walter Oechel, Donatella Zona
2016 Remote Sensing  
Information detailing the fine-scale spatial distribution of tundra communities provided by high resolution vegetation mapping, is needed to understand the relative contributions of and relationships between  ...  These results also show that tundra vegetation mapping can be scaled from the plot level (<1 m) to patch level (<500 m) using spectroscopy data rescaled to match the wavebands of the multispectral satellite  ...  Barrow Environmental Observatory (Barrow-BEO; 71 • 16 51.61"N, 156 • 36 44.44"W) tower site consists of an ice-wedge polygonal tundra landscape [48], with well-developed high-, low-and flat-center polygons  ... 
doi:10.3390/rs8120978 fatcat:qttvfxzfwbbnpotha3c3tqicba

Trends in Satellite Earth Observation for Permafrost Related Analyses—A Review

Marius Philipp, Andreas Dietz, Sebastian Buchelt, Claudia Kuenzer
2021 Remote Sensing  
By filtering after a selection of relevant keywords, a total of 325 articles from 30 international journals published during the last two decades were analyzed based on study location, spatio-temporal  ...  resolution of applied remote sensing data, platform, sensor combination and studied environmental focus for a comprehensive overview of past achievements, current efforts, together with future challenges  ...  Acknowledgments: We would like to thank three anonymous reviewers for their helpful comments on this manuscript. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/rs13061217 fatcat:upt6tyghrza6lgbdfmnezfm57m

EUCOP4 Book of Abstracts [article]

Gonçalo Vieira, Pedro Pina, Carla Mora, António Correia
2014 Zenodo  
More than 370 researchers from 24 countries have registered. A very positive response to the Call for Papers for EUCOP4 was obtained, with more than four hundred and fifty submissions.  ...  We are also very delighted to receive at EUCOP4 'The Wiley-Blackwell Permafrost and Periglacial Processes Public Lecture - PPP Award for Excellence in Permafrost Research' by Prof.  ...  Based on the heat transfer equation the model calculates the evolution of soil temperatures in the Lena River Delta with a spatial resolution of about 1sqkm.  ... 
doi:10.5281/zenodo.5532540 fatcat:ucwuntienvh7bogt77s52im7mq

Environmental controls on CH4 emission from polygonal tundra on the microsite scale in the Lena river delta, Siberia

TORSTEN SACHS, MICHAEL GIEBELS, JULIA BOIKE, LARS KUTZBACH
2010 Global Change Biology  
Despite those differences, closed-chamber measurements from within the eddy covariance footprint could be scaled by an area-weighting approach of landcover classes based on high-resolution imagery to match  ...  However, despite those differences, closed-within the eddy covariance footprint could be scaled by an areaweighting approach of landcover classes based on high-resolution imagery to match the total ecosystem-scale  ... 
doi:10.1111/j.1365-2486.2010.02232.x fatcat:wwf6zsqnybhtvpmmdcdhzztghe
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