Results 81 to 90 of about 1,165,369 (212)

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

Drivers of Dissolved Thorium Isotope Distributions Along the Adélie Land Margin, East Antarctica: The Roles of Reversible Scavenging, Conservative Transport, and Lithogenic Supply

Global Biogeochemical Cycles, Volume 40, Issue 9, September 2026.
Abstract In this study, we present a mix of full‐depth profiles and near‐bottom observations of dissolved 230Th and 232Th from the Adélie Land margin in East Antarctica, a key site of Antarctic Bottom Water (AABW) formation. We show that the distribution of dissolved Th isotopes in this region is governed by a combination of reversible scavenging ...
Thomas J. Williams, Andrea M. L. Davies, Pauline Latour, George H. Rowland, Zanna Chase, Taryn Noble, Ashley T. Townsend, Matthew Corkill, Andrew R. Bowie   +8 more
wiley   +1 more source

Seismic Velocity of Chlorite Under High Pressure and Temperature and Implications for the Lesser Antilles Subduction Zone

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Chlorite is thought to be one of the major water‐carrying phases in subduction zones, both within the slab and in the mantle wedge. Its presence has previously been linked to common seismological observations at subduction zones, including P and S wave anisotropy as well as high VP/VS ratios (>1.8) in the mantle wedge.
Nicholas Backhouse, Andrew Thomson, John Brodholt, Rostislav Hrubiak, Wilson Crichton, Ming Hao, Emmanuel A. Codillo, Anne Pommier, Michael J. Walter   +8 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

The Role of Chlorate‐Driven Oxidative Weathering in Shaping Clay Deposits on Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract Oxidized clays and the widespread Al/Si‐over‐Fe/Mg stratigraphy on Mars imply prolonged water‐rock interactions and efficient oxidative weathering despite the largely anoxic conditions of Early Mars when most deposits formed during the climate optimum.
Jiawei Wang, Nicole M. Fernandez
wiley   +1 more source

Region-Based Estimate of Endmember Variances for Hyperspectral Image Unmixing

, 2016
Endmember variability is receiving growing attention in the hyperspectral image (HSI) unmixing field. As an extension of linear mixing model (LMM), normal compositional model (NCM) assumes that the pixels of the HSI are linear combinations of random ...
Zhang, Bing, Gao, Lianru, Zhuang, Lina
core   +1 more source

Hyperspectral Unmixing Using Frequency-Adaptive Convolutional-Mamba Network

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
In recent years, deep learning (DL) has achieved remarkable progress in hyperspectral unmixing (HU) owing to its powerful feature extraction and modeling capabilities.
Zhuoyi Zhao, Xiang Xu, Chuiyi Deng, Yanyin Guo, Junwei Li, Antonio Plaza   +5 more
doaj   +1 more source

Dissolved Organic Matter Composition and Mineral Characteristics Jointly Control Adsorption Processes

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 9, September 2026.
Abstract Adsorption of dissolved organic matter (DOM) onto mineral surfaces plays a critical role in the global carbon cycle, influencing carbon stability and sequestration across terrestrial and aquatic ecosystems. Currently, it remains unclear if mineral properties or DOM composition are more relevant for predicting adsorption.
Mona Abbasi, Marloes Groeneveld, Klaus Kaiser, Karsten Kalbitz, Lars Tranvik, Dolly Kothawala   +5 more
wiley   +1 more source