Results 61 to 70 of about 50,177 (258)

Development of perennial thaw zones in boreal hillslopes enhances potential mobilization of permafrost carbon

open access: yesEnvironmental Research Letters, 2019
Permafrost thaw alters subsurface flow in boreal regions that in turn influences the magnitude, seasonality, and chemical composition of streamflow. Prediction of these changes is challenged by incomplete knowledge of timing, flowpath depth, and amount ...
Michelle A Walvoord   +3 more
doaj   +1 more source

Groundwater Rise Sustains the World's Largest Alpine Water System Under Global Warming

open access: yesAdvanced Science, EarlyView.
Shallow groundwater depth (SGWD) across the non‐permafrost plains of the Qinghai–Xizang Plateau decreased at averagely 0.02 m year−1, adding 31.44 Gt of freshwater storage from 2000 to 2020 and sustaining ∼53 500 km2 of alpine ecosystems. A vadose‐zone capacity of 426.6 Gt reveals these aquifers as promising reservoirs, highlighting groundwater's ...
Jianqing Du   +15 more
wiley   +1 more source

Recognizing spatial geochemical anomaly patterns using deformable convolutional networks guided with geological knowledge [PDF]

open access: yesGeoscientific Model Development
This study tackles the limited quantification of irregular spatial geochemical anomaly patterns and weak interpretability in deep learning models in geochemical anomaly recognition.
X. Zhang, Y. Xiong, Z. Chen
doaj   +1 more source

A Compact Hollow Fiber Electrode Assembly Architecture for Continuous Electrochemical Marine Carbon Dioxide Removal

open access: yesAdvanced Energy Materials, EarlyView.
A coaxial, membrane‐integrated hollow fiber electrode assembly (HFEA) is developed for continuous marine carbon mineralization. By utilizing a sub‐millimeter inter‐electrode gap, the HFEA minimizes Ohmic losses, achieving 50% energy reduction and over 85% DIC removal.
Inhwan Park   +5 more
wiley   +1 more source

Vertical Seismic Profile Wavefield Separation Using Median Filtering Constrained by the Linear Radon Transform

open access: yesApplied Sciences, 2018
Separation of downgoing and upgoing P-waves and S-waves in an offset 2D/3D vertical seismic profile (VSP) record is a basic step in VSP data processing. Radon transform and median filtering methods are commonly used to separate wavefields.
Yuyong Yang, Jun Lu, Yun Wang
doaj   +1 more source

Electrocatalytic Urea Waste Valorization via Water Electrolysis: Transition‐Metal Phosphides for Sustainable Hydrogen Production

open access: yesAdvanced Energy Materials, EarlyView.
This article provides a comprehensive analysis of transition metal phosphides (TMP) as electrocatalysts for urea‐assisted water electrolysis, highlighting the critical role of phosphorus engineering in modulating electronic structure, optimizing active sites, and enhancing catalytic durability.
Shivalingayya Gaddimath   +8 more
wiley   +1 more source

Groundwater in Geologic Processes

open access: yesEos, Transactions American Geophysical Union, 2000
Any student of geology who inspects a sample of galena or fluorite from one of the lead‐zinc mines of the Mississippi Valley Ore district will be immediately struck by the hydrologic processes that were required to concentrate the requisite far‐flung chemical components into a relatively thin layer of limestone.
openaire   +1 more source

Beyond the Gold Standard: Towards Industrially Viable Electrodes for Durable Perovskite Solar Cells

open access: yesAdvanced Energy Materials, EarlyView.
Transparent and opaque electrode materials are mapped by raw material cost per 1 m2 electrode area and retained median device efficiency after heat–light ageing. FTO offers a lower‐cost and more stable alternative to ITO, while Cr/Al provides the lowest‐cost rear electrode investigated with Au‐like stability and substantially improved durability ...
Tino Lukas   +17 more
wiley   +1 more source

High-temperature wood silicification: constraints from fluid and carbonaceous inclusions in quartz from Qitai, NW China

open access: yesScientific Reports
Silicified wood serves as a crucial geological archive, recording significant information about palaeoenvironment, palaeoecology, palaeontology and diagenetic conditions.
Wenqing Liu   +9 more
doaj   +1 more source

Hemp Cultivation and Crop Diversification: Implications for Ecosystem Services in Kentucky

open access: yesApplied Economic Perspectives and Policy, EarlyView.
ABSTRACT This study examines the ecosystem benefits of expanding hemp cultivation by assessing its impact on crop diversity. Using scenario‐based simulations and fixed‐effect panel regressions with county‐level data in Kentucky, we find that increased hemp acreage tends to enhance crop diversity, improving water quality and bird diversity.
Yunsun Park   +4 more
wiley   +1 more source

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