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An Integrated Shadow-Adjusted Snow-Aging Index for Alpine Regions

Haixing Li, Jinrong Liu, Xiangxu Bu, Xuezhi Feng, Pengfeng Xiao
2020 Remote Sensing  
This study proposes a novel snow-cover status index, namely shadow-adjusted snow-aging index (SASAI), portraying the integrated aging process within the Manas River Basin in northwest China.  ...  Detecting the variations in snow cover aging over undulating alpine regions is challenging owing to the complex snow-aging process and shadow effect from steep slopes.  ...  The authors would also like to thank Zuo Wang, Guangjun He, Yongke Yang, Lizao Ye, Ni Chen, and Min Li from NJU-LGISRS for helping with the snow cover environmental parameters.  ... 
doi:10.3390/rs12081249 fatcat:p3eabl4lnbamfbsghyzdvnhtxm

Perspectives on the production of a glacier inventory from multispectral satellite data in Arctic Canada: Cumberland Peninsula, Baffin Island

Frank Paul, Andreas Kääb
2005 Annals of Glaciology  
Manual delineation of Little Ice Age trimlines and moraines has been applied to calculate area changes for 225 glaciers, yielding an average area loss of 11%.  ...  A size distribution has been obtained for 770 glaciers that is very different from that for Alpine glaciers.  ...  Kellenberger for maintaining the latest imageprocessing software at our institute.  ... 
doi:10.3189/172756405781813087 fatcat:2h645l6mdndilm2wy7zvgyfrme

Mineral dust impact on snow radiative properties in the European Alps combining ground, UAV, and satellite observations

B. Di Mauro, F. Fava, L. Ferrero, R. Garzonio, G. Baccolo, B. Delmonte, R. Colombo
2015 Journal of Geophysical Research - Atmospheres  
We defined a novel spectral index, the Snow Darkening Index (SDI), that combines different wavelengths showing nonlinear correlation with measured MD concentrations (R 2 = 0.87, root-mean-square error  ...  SDI maps at local scale were produced using the UAV data, while regional SDI maps were generated with OLI data.  ...  Acknowledgments The research was supported by the SINOPIAE project funded by the Regione Lombardia.  ... 
doi:10.1002/2015jd023287 fatcat:rirypgdm4nftzmj6yeeyqpgnou

Wide-Area Analysis-Ready Radar Backscatter Composites

David Small, Christoph Rohner, Nuno Miranda, Marius Ruetschi, Michael E. Schaepman
2021 IEEE Transactions on Geoscience and Remote Sensing  
The benefits of composite products are well known to users of data from optical sensors: cloud-cleared composite reflectance or index products are commonly used as an analysis-ready data (ARD) layer.  ...  Multiple tracks are combined by weighting each observation by its local resolution, generating seamless wide-area backscatter maps suitable for applications ranging from wet snow monitoring to land cover  ...  ACKNOWLEDGMENT The authors wish to thank the European Space Agency (ESA) and the Copernicus Program for the Sentinel-1 data, as well as the Canadian Space Agency  ... 
doi:10.1109/tgrs.2021.3055562 fatcat:7ugeletlzvepzevsvjxhcfqote

Influence of microclimate and geomorphological factors on alpine vegetation in the Western Swiss Alps

Elisa Giaccone, Miska Luoto, Pascal Vittoz, Antoine Guisan, Grégoire Mariéthoz, Christophe Lambiel
2019 Earth Surface Processes and Landforms  
Furthermore, the regression models for species cover and species richness were significantly improved by adding a morphodynamics variable.  ...  Among the numerous environmental factors affecting plant communities in alpine ecosystems, the influence of geomorphic processes and landforms has been minimally investigated.  ...  Acknowledgements-This research is part of the project "Integrating spatial predictions of vegetation, soils, geomorphology and hydrology for improved assessment of ecosystem services under climate change  ... 
doi:10.1002/esp.4715 fatcat:h45w4wrllva7xboj5i72qonaze

Snow Property Inversion From Remote Sensing (SPIReS): A Generalized Multispectral Unmixing Approach With Examples From MODIS and Landsat 8 OLI

Edward H. Bair, Timbo Stillinger, Jeff Dozier
2020 IEEE Transactions on Geoscience and Remote Sensing  
simultaneously; 2) Only snow and snow-free endmembers are employed; 3) Cloud-masking and smoothing are integrated; 4) Similar spectra are grouped together and interpolants are used to reduce computation  ...  Nevertheless, there is substantial room for improvement.  ...  For regions like the Eastern Himalaya that experience frequent snow cover of short duration during the summer monsoon [70] , these thresholds likely require adjustment. N.  ... 
doi:10.1109/tgrs.2020.3040328 fatcat:aubtcai4i5b6dbmbnr3lubx24q

Mapping of glacial lakes using Sentinel-1 and Sentinel-2 data and a random forest classifier: strengths and challenges

Sonam Wangchuk, Tobias Bolch
2020 Science of Remote Sensing  
In our study, we have developed a fully automated method for mapping glacial lakes across alpine regions including the Python package called "GLa-keMap".  ...  However, mapping of glacial lakes in alpine regions is challenged by many factors.  ...  Acknowledgements Sonam Wangchuk acknowledges ESKAS -Swiss Government Excellence Scholarship for Foreign Scholars, Swiss Polar Institute, and University of Zurich for supporting the research.  ... 
doi:10.1016/j.srs.2020.100008 fatcat:hvs7pnrobjcu3o2vfq3htt5xmu

Theoretical Foundations of Remote Sensing for Glacier Assessment and Mapping [chapter]

Michael P. Bishop, Andrew B. G. Bush, Roberto Furfaro, Alan R. Gillespie, Dorothy K. Hall, Umesh K. Haritashya, John F. Shroder
2014 Global Land Ice Measurements from Space  
The international scientific community is actively engaged in assessing ice sheet and alpine glacier fluctuations at a variety of scales.  ...  We also discuss the integration of satellite-derived information into numerical modeling approaches to facilitate understandings of glacier dynamics and causal mechanisms. 2.1  ...  Given the paucity of regional mass balance information, there is an urgent need to produce estimates of mass balance for individual glaciers over extensive regions.  ... 
doi:10.1007/978-3-540-79818-7_2 fatcat:hxpzj5njcvflbh5hunggvd6uie

Satellite observed rapid green fodder expansion in northeastern Tibetan Plateau from 2010 to 2019

Tong Yang, Geli Zhang, Yuzhe Li, Jiangwen Fan, Danfeng Sun, Jie Wang, Yuanyuan Di, Nanshan You, Ruoqi Liu, Qiang Zhang, Russell B. Doughty
2021 International Journal of Applied Earth Observation and Geoinformation  
Our study demonstrated the potential of the phenology-based approach, all the available Landsat images, and GEE for tracing the historical dynamics of green fodder at 30-m resolution in alpine regions.  ...  We developed a simple approach for the rapid identification of green fodder fields by using a new green fodder index that considers the unique phenology of green fodder, which has higher greenness and  ...  Jinwei Dong for his valuable comments in the earlier versions of the manuscript.  ... 
doi:10.1016/j.jag.2021.102394 fatcat:53ulzhtqdbajpoqkefjzoue4tq

The Austrian UVA ‐Network

Alois W. Schmalwieser, Barbara Klotz, Michael Schwarzmann, Dietmar J. Baumgartner, Josef Schreder, Günther Schauberger, Mario Blumthaler
2019 Photochemistry and Photobiology  
The ultraviolet-A (UVA) part of the solar spectrum at the Earth's surface is an essential environmental factor but continuous long-time monitoring of UVA radiation is rarely done.  ...  Data indicate clear annual courses and an increase of UVA with altitude by 8-9% per 1000 m. In the first half of the year, UVA radiation is higher than in the second half, due to less cloudiness.  ...  The devices are checked by operators two to three times a week, whereas especially, the quartz domes of the devices are checked for dirt and dust, and the shadow-ring is adjusted.  ... 
doi:10.1111/php.13111 pmid:31017671 pmcid:PMC6852124 fatcat:6v2fqjmuavbqhnz3tlxvmjsd2a

Evaluating a prediction system for snow management

Pirmin Philipp Ebner, Franziska Koch, Valentina Premier, Carlo Marin, Florian Hanzer, Carlo Maria Carmagnola, Hugues François, Daniel Günther, Fabiano Monti, Olivier Hargoaa, Ulrich Strasser, Samuel Morin (+1 others)
2021 The Cryosphere  
We applied snow management strategies integrated in the snowpack simulations of AMUNDSEN, Crocus, and SNOWPACK–Alpine3D for nine PROSNOW ski resorts located in the European Alps.  ...  As snow management assessment and prediction systems get integrated into the workflow of resort managers, the formulation of snow management can be refined in the future.  ...  We thank our project partners and ski resorts for many constructive discussions and providing data to improve the manuscript. Financial support.  ... 
doi:10.5194/tc-15-3949-2021 fatcat:mueanji22vasjibgimsdf5pefq

Comparison of a forest process model (3-PG) with growth and yield models to predict productivity at Bago State Forest, NSW

P. K. Tickle, N. C. Coops, S. D. Hafner
2001 Australian Forestry  
The estimates over an 80-year rotation varied by as much as 24% for a forest stratum, and by as much as 40% at the stand level.  ...  now offer operational potential for use in routine forest management and planning.  ...  For additional information about 3-PG refer to or contact the author.  ... 
doi:10.1080/00049158.2001.10676174 fatcat:ziqhlpkstfbj5crrilg33hqnfa

Monitoring snow depth change across a range of landscapes with ephemeral snowpacks using structure from motion applied to lightweight unmanned aerial vehicle videos

Richard Fernandes, Christian Prevost, Francis Canisius, Sylvain G. Leblanc, Matt Maloley, Sarah Oakes, Kiyomi Holman, Anders Knudby
2018 The Cryosphere  
regions.  ...  These results indicate that the accuracy of UAV-based estimates of weekly snow depth change was, excepting conditions with deep fresh snow, substantially better than for snow depth and was comparable to  ...  The authors thank Najib Djamai, Robert Fraser and Morgan Macfarlane-Winchester and the two anonymous external reviewers for reviewing the paper.  ... 
doi:10.5194/tc-12-3535-2018 fatcat:vsitaskvt5bkljpe7yhr2qodym

Mapping Deforestation and Forest Degradation Patterns in Western Himalaya, Pakistan

Faisal Qamer, Khuram Shehzad, Sawaid Abbas, MSR Murthy, Chen Xi, Hammad Gilani, Birendra Bajracharya
2016 Remote Sensing  
for approximately 67% of the total forest cover of the country.  ...  This work comprises a satellite image based study in combination with national expert validation to generate sub-district level statistics for forest cover over the Western Himalaya, Pakistan, which accounts  ...  International Development (DFID) through core funding to the International Centre for Integrated Mountain Development (ICIMOD).  ... 
doi:10.3390/rs8050385 fatcat:sah3ls4335ddboydgtzjoi6gki

Near-Real Time Automatic Snow Avalanche Activity Monitoring System Using Sentinel-1 SAR Data in Norway

Markus Eckerstorfer, Hannah Vickers, Eirik Malnes, Jakob Grahn
2019 Remote Sensing  
For the first time, we present a dataset of spatio-temporal avalanche activity over several winters from a large region.  ...  Currently, the Norwegian Avalanche Warning Service is using our processing system for pre-operational use in three regions in Norway.  ...  Radar backscatter is exported as two separate geotiff-files for the area of interest. In addition, we also export a mask-file defining the layover and shadow regions.  ... 
doi:10.3390/rs11232863 fatcat:3cauky3bcbefjcoshoc6z6p7su
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