Results 91 to 100 of about 61,211 (288)

A new, ~4500‐year varve record and high‐resolution tephrochronology from lake Hämälänlampi, eastern Finland, provides age constraints for the Furnas C and the Glen Garry/Askja A‐2000 eruptions

Journal of Quaternary Science, EarlyView.
ABSTRACT The northern European distal cryptotephra framework is constantly developing both in terms of identification of new tephra horizons and improved age constraints for the already well‐established tephra marker horizons. However, many prehistoric tephra layers have only been dated by the radiocarbon method, with its inherent problems.
Maarit Kalliokoski, Veera Erola, Saija Saarni   +2 more
wiley   +1 more source

Upper- and mid-mantle interaction between the Samoan plume and the Tonga-Kermadec slabs [PDF]

, 2016
Mantle plumes are thought to play a key role in transferring heat from the core\u2013mantle boundary to the lithosphere, where it can significantly influence plate tectonics. On impinging on the lithosphere at spreading ridges or in intra-plate settings,
AM Dziewoński, AM Volpe, AMG Ferreira, C Bassin, C DeMets, D Mainprice, D Mainprice, D Mainprice, D Zhao, DL Kohlstedt, E Kaminski, ER Engdahl, FA Capitanio, G Morra, GS Robertson, H Takeuchi, H-R Wenk, J Gill, J Ritsema, J Wookey, JAD Connolly, JE Lupton, JH Woodhouse, JH Woodhouse, JH Woodhouse, KA Druken, M Bevis, M Faccenda, M Faccenda, M Faccenda, M Gurnis, MG Jackson, ML Lytle, MS Thorne, N Schmerr, OL Anderson, P Carrez, P Cordier, PG Betts, PG Betts, R Hall, RJ Poreda, S Turner, S-J Chang, S-J Chang, SR Hart, SW French, UR Christensen, W Rodi, W-P Chen, WG Mason, WP Schellart, WP Schellart, Y Fukao, Y Lagabrielle   +54 more
core   +2 more sources

Carbon, Nitrogen, and Corresponding Stable Isotope Signatures Reveal Channel Banks as Major Sediment Sources in a Tropical Agricultural Watershed

Land Degradation &Development, EarlyView.
ABSTRACT Uncertainties about the applicability of δ13C and δ15N as tracers of sediment sources in tropical river basins highlight the need for more in‐depth investigations of these isotopes. This study therefore assessed the effectiveness of δ13C and δ15N signatures in discriminating sediment sources in an agricultural catchment in Northeast Brazil ...
Fábio Farias Amorim, Yuri Jacques Agra Bezerra da Silva, Rennan Cabral Nascimento, Ygor Jacques Agra Bezerra da Silva, Angelo Jamil Maia, Tales Tiecher, Jean Paolo Gomes Minella, Yusheng Zhang, Hari Ram Upadhayay, Simon Pulley, Adrian L. Collins   +10 more
wiley   +1 more source

Influence of chemical reaction kinetics on electrokinetic remediation modelling results [PDF]

, 2017
A numerical model describing transport of multiple species and chemical reactions during electrokinetic treatment is presented. The transport mechanisms included in the model were electromigration and electroosmosis.
Ceccarini, Alessio, Gomez-Lahoz, Cesar, Iannelli, Renato, Masi, Matteo, Paz-Garcia, Juan Manuel, Villen-Guzman, Maria   +5 more
core  

Estimating Soil Compaction Risk at Regional Scales Using Meteorological Data and Soil Spectroscopy

Land Degradation &Development, EarlyView.
ABSTRACT Soil compaction is a significant form of soil degradation in Europe, reducing agricultural productivity, limiting carbon sequestration and increasing greenhouse gases emissions. In response, the forthcoming European Union Soil Monitoring and Resilience Law requires spatial assessment of topsoil and subsoil compaction risk at district, that is,
Felipe Bachion de Santana, Rebecca. L. Hall, Longnan Shi, Owen Fenton, Victoria Lowe, Giulia Bondi, Lilian O'Sullivan, Karen Daly   +7 more
wiley   +1 more source

High-temporal resolution fluvial sediment source fingerprinting with uncertainty: a Bayesian approach [PDF]

, 2014
This contribution addresses two developing areas of sediment fingerprinting research. Specifically, how to improve the temporal resolution of source apportionment estimates whilst minimizing analytical costs and, secondly, how to consistently quantify ...
Acornley, Agency, Bilotta, Blake, Boardman, Buchanan, Collins, Collins, Collins, Collins, Cooper, D'Haen, Dutton, Egozcue, Evans, Evrard, Evrard, Fox, Gellis, Gruszowski, Hancock, Hilton, Hiscock, Hiscock, Hopkins, Horowitz, House, Huisman, Jobbágy, Kim, Krueger, Lefrançois, Legout, Lewis, Martínez-Carreras, Martínez-Carreras, Massoudieh, Matsumoto, Meteorological Office, Motha, Navratil, Olley, Owens, Palmer, Parnell, Parnell, Phillips, Plummer, Poulenard, Poulenard, Pretty, R Development Core Team, Rawlins, Rawlins, Rowan, Russell, Schindler Wildhaber, Sear, Semmens, Slimane, Small, Smith, Smith, Smith, Theuring, Thompson, Thompson, Tremblay, Walling, Walling, Wilkinson, Williams   +71 more
core   +1 more source

How the Physical and Chemical Properties Affect the Heavy Metal Content in Surface Water in Different Types of Peatlands

Land Degradation &Development, EarlyView.
ABSTRACT Only ~3% of the global land surface is covered by peatlands, yet more than one‐third of global soil carbon is stored in these ecosystems and contaminant filtration can be provided. The extent to which peat humification (Fibric–Hemic–Sapric) is linked to dissolved heavy metals in peatland surface waters has remained poorly quantified at a ...
Stanisław Łyszczarz, Norbert Szymański, Michał Jasik, Wojciech Piaszczyk, Andrzej Szlachta, Mirosław Żelazny, Ewa Błońska, Jarosław Lasota, Stanisław Małek   +8 more
wiley   +1 more source

Unlocking the potential of CO2 storage in saline aquifers: Challenges, knowledge gaps, and future directions for large-scale storage

Carbon Capture Science & Technology
Saline aquifers represent a significant geological option for large-scale CO2 storage through CO2 solubilization in brine and subsequent geochemical interactions that facilitate mineralization.
Maryana Emad Helmi, Isah Mohammed, Mohamed Gamal Rezk, Afeez Olayinka Gbadamosi, Arshad Raza, Mohamed Mahmoud   +5 more
doaj   +1 more source

The role of biofilms in subsurface transport processes [PDF]

, 2010
Landfill and radioactive waste disposal risk assessments focus on contaminant transport and are principally concerned with understanding the movement of gas, water and solutes through engineered barriers and natural groundwater systems.
Bateman, K., Coombs, P., Harrison, H., Milodowski, A.E., Noy, D., Wagner, D., West, J.M.   +6 more
core   +1 more source

Anaerobic Corrosion Phenomena of Cast Iron and Copper in Artificial Groundwater at Elevated Temperature

Materials and Corrosion, EarlyView.
This study examines corrosion of copper and cast iron as candidate canister materials for high‐level radioactive waste disposal in contact with bentonite suspension. The influence of three electrolyte compositions on corrosion behavior under repository‐relevant conditions is assessed.
Louisa Panjiyar, Martin Ende, Christiane Stephan‐Scherb   +2 more
wiley   +1 more source