Results 81 to 90 of about 1,244,965 (221)

Fractional Impervious Surface Mapping on Multispectral Images With Visible Shadows via a Bundle-Based Sparse Unmixing Model

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Impervious surface abundance (ISA) is an important indicator for monitoring urbanization and environmental disaster management processes. Commonly used spectral unmixing techniques extract ISA in the form of mixed pixels; however, in previous ...
Yanze Liu, Dacheng Li, Wei Xiong, Qijin Han, Lingling Ma   +4 more
doaj   +1 more source

An Outlier-Insensitive Unmixing Algorithm With Spatially Varying Hyperspectral Signatures

IEEE Access, 2019
Effective hyperspectral unmixing (HU) is essential to the estimation of the underlying materials' signatures (endmember signatures) and their spatial distributions (abundance maps) from a given image (data) of a hyperspectral scene.
Yao-Rong Syu, Chia-Hsiang Lin, Chong-Yung Chi   +2 more
doaj   +1 more source

Early development of anoxia prior to the main euxinic phase of the Jenkyns Event on the margin of the Western Tethys (Sachrang Basin, Eastern Alps)

Sedimentology, EarlyView.
ABSTRACT Although the global expansion of oxygen‐depleted marine environments during the Early Toarcian Jenkyns Event (or Toarcian Oceanic Anoxic Event) is primarily inferred from successions in the NW European epicontinental basins, the timing of the expansion of anoxia in Tethyan basins, where hydrography potentially played a minor role, is poorly ...
Tamás Müller, Stefan Neumeister, Jan Schlögl, Emanuela Mattioli, Hans‐Jürgen Gawlick, Thomas J. Algeo, Adam Tomašových   +6 more
wiley   +1 more source

Conditions and timing for the precipitation of early marine diagenetic dolomite in the Triassic Dolomia Principale (northern Italy)

Sedimentology, EarlyView.
ABSTRACT Thermodynamic constraints and empirical evidence often suggest that fabric‐retentive replacement dolomites are stable carbonate minerals that preserve ancient seawater properties. This study evaluates this hypothesis by examining the Upper Triassic Dolomia Principale in Northern Italy.
Vivien Folliot, Giovanna Della Porta, Mathias Mueller, Fabrizio Berra, Benjamin F. Walter, Aratz Beranoaguirre, Sylvia Riechelmann, Oskar Schramm, Adrian Immenhauser   +8 more
wiley   +1 more source

Unit-Simplex-Inspired Graph Attention Network for Robust Endmember Determination in Hyperspectral Imagery

Remote Sensing
Endmember extraction (EE) in an unmixing chain aims at determining source component spectra constituting pixels from hyperspectral imagery. However, the influence of spectral variability, nonlinear manifolds, and outliers on datasets can seriously ...
Bin Yang, Bin Wang
doaj   +1 more source

Comparison of Methods for Estimating Fractional Cover of Photosynthetic and Non-Photosynthetic Vegetation in the Otindag Sandy Land Using GF-1 Wide-Field View Data

Remote Sensing, 2016
Photosynthetic vegetation (PV) and non-photosynthetic vegetation (NPV) are important ground cover types for desertification monitoring and land management.
Xiaosong Li, Guoxiong Zheng, Jinying Wang, Cuicui Ji, Bin Sun, Zhihai Gao   +5 more
doaj   +1 more source

A LiDAR signature library simulated from 3-dimensional Discrete Anisotropic Radiative Transfer (DART) model to classify fuel types using spectral matching algorithms

GIScience & Remote Sensing, 2019
Fuel types are one of the key variables that drive wildfire ignition and propagation. A new method is proposed to automatically classify and map fuel types from LiDAR data.
M. Teresa Lamelas-Gracia, David Riaño, Susan Ustin   +2 more
doaj   +1 more source

Species Composition Varies Among Artificial and Natural Benthic Substrates Within Estuarine Environments

Aquaculture, Fish and Fisheries, Volume 6, Issue 6, December 2026.
ABSTRACT As the commercial development of aquaculture grows, assessing the impact of culture gear on local marine communities becomes increasingly imperative. Gear associated with off‐bottom oyster aquaculture introduces artificial structure to areas that would otherwise be devoid of structural complexity and heterogeneity.
Maxwell Collins, Brendan Campbell, Lillian Kuntz, Sarah Loprinzo, Rileigh E. Hudock, Thomas Schultz, Edward Hale   +6 more
wiley   +1 more source

A Field Guide to Corralling the Chaos: A Planning Framework for Using Models to Guide Opportunistic Field Studies of Natural Disturbances

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract Watersheds regulate biogeochemical processes and provide ecosystem services to human societies, but disturbances can fundamentally alter these processes across space and time. Determining when and where to sample to capture disturbance impacts in watersheds remains a central challenge.
Peter Regier, James C. Stegen, Sundar Niroula, Brieanne Forbes, Amy E. Goldman, Nicholas D. Ward, Jake Cavaiani, Lupita Renteria, Xingyuan Chen, Allison N. Myers‐Pigg   +9 more
wiley   +1 more source

Terrestrial inputs and in‐lake processes shape dissolved organic matter along a permafrost gradient

Limnology and Oceanography, Volume 71, Issue 11, November 2026.
Abstract Northern permafrost landscapes store large amounts of organic carbon that can enter lakes as dissolved organic matter (DOM), but links among shoreline terrestrial sources, lake‐water DOM composition, and catchment configuration remain uncertain in low‐precipitation Shield landscapes. We combined shoreline soil‐porewater and lake‐water sampling
Ryan H. S. Hutchins, Jeremy G. Leathers, Sherry L. Schiff, Michael C. English, Mackenzie Schultz, Jason J. Venkiteswaran, Suzanne E. Tank, Richard J. Elgood, Pieter J. K. Aukes   +8 more
wiley   +1 more source