Results 31 to 40 of about 27,923 (202)

Spatial snow water equivalent estimation for mountainous areas using wireless-sensor networks and remote-sensing products [PDF]

, 2018
We developed an approach to estimate snow water equivalent (SWE) through interpolation of spatially representative point measurements using a k-nearest neighbors (k-NN) algorithm and historical spatial SWE data.
Bales, RC, Conklin, MH, Molotch, NP, Oroza, CA, Zheng, Z   +4 more
core   +1 more source

Improving Mountain Snow and Land Cover Mapping Using Very-High-Resolution (VHR) Optical Satellite Images and Random Forest Machine Learning Models

Remote Sensing, 2022
Very-high-resolution (VHR) optical imaging satellites can offer precise, accurate, and direct measurements of snow-covered areas (SCA) with sub-meter to meter-scale resolution in regions of complex land cover and terrain.
J. Michelle Hu, David Shean
doaj   +1 more source

Fractional snow cover in the Colorado and Rio Grande basins, 1995–2002 [PDF]

Water Resources Research, 2008
A cloud‐masked fractional snow‐covered area (SCA) product gridded at 1 km was developed from the advanced very high resolution radiometer for the Colorado River and upper Rio Grande basins for 1995–2002. Cloud cover limited SCA retrievals on any given 1‐km2 pixel to on average once per week.
Bales, R. C, Dressler, K. A, Imam, B., Fassnacht, S. R, Lampkin, D.   +4 more
openaire   +4 more sources

FRACTIONAL SNOW COVER MAPPING BY ARTIFICIAL NEURAL NETWORKS AND SUPPORT VECTOR MACHINES [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
Snow is an important land cover whose distribution over space and time plays a significant role in various environmental processes. Hence, snow cover mapping with high accuracy is necessary to have a real understanding for present and future climate ...
B. B. Çiftçi, S. Kuter, S. Kuter, Z. Akyürek, Z. Akyürek, G.-W. Weber, G.-W. Weber   +6 more
doaj   +1 more source

Xinjiang Fractional Snow Cover Estimation Based on Multi-Scale Feature Fusion Network [PDF]

Jisuanji gongcheng, 2022
Binary fractional snow remote sensing products are affected by complex terrain and low resolution of remote sensing data.The traditional binary fractional snow remote sensing products have serious miscalculation and omission in the calculation of ...
ZHANG Yonghong, XU Fan, KAN Xi, CAO Haixiao
doaj   +1 more source

Fractional snow cover estimation in Tibetan Plateau using MODIS and ASTER [PDF]

Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05., 2005
Seasonal snow cover plays a significant role in regional, large even global scale climate processes, hydrological cycle and surface thermal balance processes. MODIS snow cover methods provide an operational model for mapping each pixel into snow or no-snow by using a normalized difference snow Index (NDSI) and its threshold test.
Lina Xu, Jiancheng Shi 0001, Hongen Zhang, Shengli Wu 0002   +3 more
openaire   +1 more source

Sensing Area‐Average Snow Water Equivalent with Cosmic‐Ray Neutrons: The Influence of Fractional Snow Cover [PDF]

Water Resources Research, 2019
AbstractCosmic‐ray neutron sensing (CRNS) is a promising non‐invasive technique to estimate snow water equivalent (SWE) over large areas. In contrast to preliminary studies focusing on shallow snow conditions (SWE 130 mm), more recently the method was shown experimentally to be sensitive also to deeper snowpacks providing the basis for its use at ...
Schattan, P., Köhli, M., Schrön, M., Baroni, G., Oswald, S. E.   +4 more
openaire   +2 more sources

Snow metamorphism: a fractal approach

, 2010
Snow is a porous disordered medium consisting of air and three water phases: ice, vapour and liquid. The ice phase consists of an assemblage of grains, ice matrix, initially arranged over a random load bearing skeleton.
A. D. Frolov, Anna Carbone, Barbara Frigo, Bernardino M. Chiaia, C. W. Emerson, Christian Türk, D. L. Turcotte, V. N. Golubev   +7 more
core   +1 more source

MODIS daily cloud-gap-filled fractional snow cover dataset of the Asian Water Tower region (2000–2022) [PDF]

Earth System Science Data
Accurate long-term daily cloud-gap-filled fractional snow cover products are essential for climate change and snow hydrological studies in the Asian Water Tower (AWT) region, but existing Moderate Resolution Imaging Spectroradiometer (MODIS) snow cover ...
F. Pan, L. Jiang, G. Wang, J. Pan, J. Huang, C. Zhang, H. Cui, J. Yang, Z. Zheng, S. Wu, J. Shi   +10 more
doaj   +1 more source

Analysis of topographic controls on depletion curves derived from airborne lidar snow depth data

Hydrology Research, 2021
The annual consistency of spatial patterns of snow accumulation and melt suggests that the evolution of these patterns, known as depletion curves, is useful for estimating basin water content and runoff prediction. Theoretical snow cover depletion curves
Dominik Schneider, Noah P. Molotch, Jeffrey S. Deems, Thomas H. Painter   +3 more
doaj   +1 more source