Results 91 to 100 of about 1,362 (207)

Composition and Provenance of Victoria Group Sandstones in Southern North Victoria Land, Antarctica

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.
Three distinct source areas contributed to sandstones of the Victoria Group within the Transantarctic Basin in southern North Victoria Land. During the Permian, quartzose sandstones were derived from erosion of the local Ross Orogen, likely from an uplifted swell in the area of today's Ross Sea, the Ross High.
Martin Elsner, Robert Schöner, Reinhard Gaupp, Andreas Kronz, Benjamin Bomfleur, Joerg W. Schneider, Lothar G. Viereck   +6 more
wiley   +1 more source

From temporal variability to integrated metabolic balance: Interpreting total alkalinity and dissolved inorganic carbon relationships in dynamic coral reef ecosystems

Limnology and Oceanography Letters, Volume 11, Issue 5, September 2026.
Abstract Linear regressions between total alkalinity (TA) and dissolved inorganic carbon (DIC) are widely used to infer the balance between net ecosystem calcification (NEC) and net ecosystem production (NEP) in coral reefs. Using high‐frequency carbonate chemistry observations from an Australian reef flat and simple numerical models, we show that TA ...
Tyler Cyronak, Yuichiro Takeshita, Rebecca Albright, Ken Caldeira, Bradley Eyre, Alyssa Griffin, David A. Koweek, Jennifer Mallon, Manoela Romano de Orte, Kai G. Schulz, Kennedy Wolfe   +10 more
wiley   +1 more source

An Improved Spatial and Temporal Reflectance Unmixing Model to Synthesize Time Series of Landsat-Like Images

Remote Sensing, 2018
The trade-off between spatial and temporal resolution limits the acquisition of dense time series of Landsat images, and limits the ability to properly monitor land surface dynamics in time.
Jianhang Ma, Wenjuan Zhang, Andrea Marinoni, Lianru Gao, Bing Zhang   +4 more
doaj   +1 more source

Modelling Spatial and Temporal Controls on Leaky Wooden Dam Effectiveness for Catchment‐Scale Flood Mitigation in an Upland Catchment

Journal of Flood Risk Management, Volume 19, Issue 3, September 2026.
ABSTRACT Natural Flood Management (NFM) is increasingly adopted as a sustainable strategy for mitigating flood risk. Among these measures, the installation of leaky wooden dams (LWDs) at catchment scale is a widely used intervention aimed at slowing flow and desynchronising runoff peaks between sub‐catchments, thereby reducing flood magnitude.
J. M. Wolstenholme, C. J. Skinner, D. J. Milan, R. E. Thomas, D. R. Parsons   +4 more
wiley   +1 more source

Stochastic Spectral Unmixing with Enhanced Endmember Class Separation [PDF]

, 2004
Improvements to an algorithm for performing spectral unmixing of hyperspectral imagery based on the stochastic mixing model (SMM) are presented. The SMM provides a method for characterizing both subpixel mixing of the pure image constituents, or ...
Hardie, Russell C., Eismann, Michael T.
core   +1 more source

Energy Channel Coupling by Mid‐Trophic Level Fish Challenges the Landscape Theory for Food Web Architecture in a Large Tropical Lake Ecosystem

Ecology and Evolution, Volume 16, Issue 8, August 2026.
Lake Turkana, a large tropical East African Great Lake, is an ideal model for examining how consumer fish species may mediate the coupling of fast and slow energy channels within food webs. We explored the ecological niche dynamics of five important Lake Turkana fish species across ontogeny and used a Bayesian isotope mixing model approach to identify ...
Madison F. Muehl, Jill A. Olin, James L. Keyombe, Josephine Y. Aller, Robert M. Cerrato   +4 more
wiley   +1 more source

The Successive Projection Algorithm (SPA), an Algorithm with a Spatial Constraint for the Automatic Search of Endmembers in Hyperspectral Data

Sensors, 2008
Spectral mixing is a problem inherent to remote sensing data and results in fewimage pixel spectra representing "pure" targets. Linear spectral mixture analysis isdesigned to address this problem and it assumes that the pixel-to-pixel variability in ...
D. M. Rogge, Benoit Rivard, Jinkai Zhang
doaj  

A Phenological Approach to Spectral Differentiation of Low-Arctic Tundra Vegetation Communities, North Slope, Alaska

Remote Sensing, 2017
Arctic tundra ecosystems exhibit small-scale variations in species composition, micro-topography as well as significant spatial and temporal variations in moisture.
Alison Leslie Beamish, Nicholas Coops, Sabine Chabrillat, Birgit Heim   +3 more
doaj   +1 more source

Potential Warming‐Induced Changes in Stream Water Sources Between Proglacial and Non‐Glacial Streams, South‐Central Alaska

Hydrological Processes, Volume 40, Issue 8, August 2026.
Land cover and elevation are shown to influence the proportion of stream source waters across glacial and non‐glacial streams. Groundwater makes up a large proportion of both early season and late season flow in most glacial and non‐glacial streams, while the timing of snow and ice melt is driven by the presence or absence of a glacier within the ...
H. K. Richardson, A. J. Bergstrom, J. C. Koch, Z. A. Frederick, J. B. Shanley, E. H. Baker   +5 more
wiley   +1 more source

Nonlinearity detection in hyperspectral images using a polynomial post-nonlinear mixing model [PDF]

, 2012
This paper studies a nonlinear mixing model for hyperspectral image unmixing and nonlinearity detection. The proposed model assumes that the pixel reflectances are nonlinear functions of pure spectral components contaminated by an additive white Gaussian
Altmann, Yoann, Altmann, Yoann; id_orcid, Dobigeon, Nicolas, Tourneret, Jean-Yves   +3 more
core   +1 more source