Results 71 to 80 of about 465,436 (305)

Submarine fresh groundwater discharge estimation in the intertidal zone based on dynamic salinity simulation

open access: yesShuiwen dizhi gongcheng dizhi
Currently, limited studies focused on the variations in submarine fresh groundwater discharge rates, seawater recirculation rates, and their respective proportions with tidal level change in sandy intertidal zones.
Zhixiu WANG   +5 more
doaj   +1 more source

Genomics Insights Into High‐Latitude Adaptation of Tibetan Macaques

open access: yesAdvanced Science, EarlyView.
Tibetan macaques exhibit unique adaptations to cold, high‐latitude environments, including shortened tails and enhanced fat storage. Genomic analyses reveal a species‐specific TBX6 mutation linked to tail reduction and selection on lipid metabolism genes.
Rusong Zhang   +12 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

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

Multifunctional Tailoring of Fertilizer Composites Directly Derived From Phosphate Rock

open access: yesAdvanced Science, EarlyView.
A novel phosphorus‑sulfur mixed acid with urea (PSU) activation system converts low‑grade phosphate rock (LPR) into multifunctional fertilizer composites (MFCs). MFCs feature porous structures, high nutrient‑activation efficiency, superior slow‑release, and enhanced crop growth, offering a sustainable solution for integrated nutrient management and ...
Zenglian Qi   +13 more
wiley   +1 more source

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

Mapping Vesta: First Results from Dawn’s Survey Orbit [PDF]

open access: yes, 2011
The geologic objectives of the Dawn Mission [1] are to derive Vesta’s shape, map the surface geology, understand the geological context and contribute to the determination of the asteroids’ origin and evolution.Geomorphology and distribution of ...
Ammannito, E.   +50 more
core  

Geochemical reactivity of subsurface sediments as potential buffer to anthropogenic inputs: a strategy for regional characterization in the Netherlands [PDF]

open access: yes, 2011
Geochemical reactivity of subsurface sediments as potential buffer to anthropogenic inputs: a strategy for regional characterization in the ...
Gaans, P.F.M., van   +3 more
core   +3 more sources

Stress‐Induced Melting Controlled Failure Mechanisms of Methane Hydrate

open access: yesAdvanced Science, EarlyView.
We study methane hydrate via nanoindentation and nuclear magnetic resonance (NMR), finding its regional melting and mechanical properties, challenging existing views on hydrogen‐bonded crystals. Abstract Methane hydrate, a kind of nonstoichiometric crystalline, attracted worldwide attentions as a promising substitute energy. Its Dissociation is thought
Yanlong Li   +9 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

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