Oxford Index Browse

You are looking at 1-20 of 156 items for:

Oceanography and Hydrology x Geophysics x clear all

Show only full text

Refine by type

Refine by product

 

Accurate modelling and inversion of electrical resistivity data in the presence of metallic infrastructure with known location and dimension

T.C. Johnson and D. Wellman.

in Geophysical Journal International

P ublished online June 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 8689 words.

Electrical resistivity tomography (ERT) has been widely used in environmental applications to study processes associated with subsurface contaminants and contaminant remediation....

Go to »  full text

Acoustic isolation of a monopole logging while drilling tool by combining natural stopbands of pipe extensional waves

Yuan-Da Su, Xiao-Ming Tang, Song Xu and Chun-Xi Zhuang.

in Geophysical Journal International

P ublished online May 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 3564 words.

For extensional wave propagation along a cylindrical pipe, there exists a natural stopband in the frequency range between the first and second modes. This study explores the feasibility and...

Go to »  full text

Adaptive time-lapse optimized survey design for electrical resistivity tomography monitoring

Paul B. Wilkinson, Sebastian Uhlemann, Philip I. Meldrum, Jonathan E. Chambers, Simon Carrière, Lucy S. Oxby and M.H. Loke.

in Geophysical Journal International

P ublished online September 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 8830 words.

Adaptive optimal experimental design methods use previous data and results to guide the choice and design of future experiments. This paper describes the formulation of an adaptive survey...

Go to »  full text

Advances in GPR data acquisition and analysis for archaeology

Wenke Zhao, Gang Tian, Emanuele Forte, Michele Pipan, Yimin Wang, Xuejing Li, Zhanjie Shi and Haiyan Liu.

in Geophysical Journal International

P ublished online April 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 5009 words.

The primary objective of this study is to evaluate the applicability and the effectiveness of ground-penetrating radar (GPR) to identify a thin burnt soil layer, buried more than 2 m below...

Go to »  full text

The advantages of logarithmically scaled data for electromagnetic inversion

Brent Wheelock, Steven Constable and Kerry Key.

in Geophysical Journal International

P ublished online April 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 12826 words.

Non-linear inversion algorithms traverse a data misfit space over multiple iterations of trial models in search of either a global minimum or some target misfit contour. The success of the...

Go to »  full text

Analysis of anomalous electrical conductivity and magnetic permeability effects using a frequency domain controlled-source electromagnetic method

Kyubo Noh, Seokmin Oh, Soon Jee Seol, Ki Ha Lee and Joongmoo Byun.

in Geophysical Journal International

P ublished online January 2016 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 8680 words.

We present a series of processes for understanding and analysing controlled-source electromagnetic (CSEM) responses for a conductive and permeable earth. To realize the CSEM response, a new...

Go to »  full text

An analytical study of seismoelectric signals produced by 1-D mesoscopic heterogeneities

Leonardo B. Monachesi, J. Germán Rubino, Marina Rosas-Carbajal, Damien Jougnot, Niklas Linde, Beatriz Quintal and Klaus Holliger.

in Geophysical Journal International

P ublished online February 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 10291 words.

The presence of mesoscopic heterogeneities in fluid-saturated porous rocks can produce measurable seismoelectric signals due to wave-induced fluid flow between regions of differing...

Go to »  full text

Attenuation of elastic waves in bentonite and monitoring of radioactive waste repositories

A. Biryukov, N. Tisato and G. Grasselli.

in Geophysical Journal International

P ublished online February 2016 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 11745 words.

Deep geological repositories, isolated from the geosphere by an engineered bentonite barrier, are currently considered the safest solution for high-level radioactive waste (HLRW) disposal....

Go to »  full text

Axisymmetric analysis of multilayered thermoelastic media with application to a repository for heat-emitting high-level nuclear waste in a geological formation

Yang Yang, Maria Datcheva and Tom Schanz.

in Geophysical Journal International

P ublished online June 2016 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 7252 words.

Comprehensive analytical solutions to 3-D axisymmetric problems for static response of multilayered thermoelastic media subjected to surface loads and containing sources are presented in...

Go to »  full text

Bayesian inversion of marine controlled source electromagnetic data offshore Vancouver Island, Canada

Romina A.S. Gehrmann, Katrin Schwalenberg, Michael Riedel, George D. Spence, Volkhard Spieß and Stan E. Dosso.

in Geophysical Journal International

P ublished online November 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 11028 words.

This paper applies nonlinear Bayesian inversion to marine controlled source electromagnetic (CSEM) data collected near two sites of the Integrated Ocean Drilling Program (IODP) Expedition...

Go to »  full text

Bayesian inversion of marine CSEM data from the Scarborough gas field using a transdimensional 2-D parametrization

Anandaroop Ray, Kerry Key, Thomas Bodin, David Myer and Steven Constable.

in Geophysical Journal International

P ublished online October 2014 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 12148 words.

We apply a reversible-jump Markov chain Monte Carlo method to sample the Bayesian posterior model probability density function of 2-D seafloor resistivity as constrained by marine...

Go to »  full text

Bootstrap resampling as a tool for uncertainty analysis in 2-D magnetotelluric inversion modelling

Sebastian Schnaidt and Graham Heinson.

in Geophysical Journal International

P ublished online August 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 10276 words.

Uncertainty estimation is a vital part of geophysical numerical modelling. There exist a variety of methods aimed at uncertainty estimation, which are often complicated and difficult to...

Go to »  full text

Capacitively Coupled Resistivity measurements to determine frequency-dependent electrical parameters in periglacial environment—theoretical considerations and first field tests

A. Przyklenk, A. Hördt and T. Radić.

in Geophysical Journal International

P ublished online May 2016 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 8030 words.

Capacitively Coupled Resistivity (CCR) is conventionally used to emulate DC resistivity measurements and may provide important information about the ice content of material in periglacial...

Go to »  full text

The characteristics of gravity and magnetic fields and the distribution of tight sandstone gas in the eastern Ordos Basin, China

Bingqiang Yuan, Huaan Zhang, Chunguan Zhang, Haihong Xu and Yunkui Yan.

in Geophysical Journal International

P ublished online February 2016 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 9561 words.

In order to perform gas exploration and determine the distribution pattern of gas in the Yanchang Oil Field in the eastern part of the North Shaanxi Slope, Ordos Basin, China, gravity and...

Go to »  full text

Characterizing electrical properties and permeability changes of hydrate bearing sediments using ERT data

Mike Priegnitz, Jan Thaler, Erik Spangenberg, Judith M. Schicks, Jörg Schrötter and Sven Abendroth.

in Geophysical Journal International

P ublished online July 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 9814 words.

A LArge Reservoir Simulator (LARS) was equipped with an electrical resistivity tomography (ERT) array to monitor hydrate formation and dissociation experiments. During two hydrate formation...

Go to »  full text

Coastal Hazards, Risks, and Marine Extreme Events

Eduardo Marone, Ricardo de Camargo and Julio Salcedo Castro.

P ublished online October 2017 .

Article. Subjects: Natural Disasters (Environmental Science); Oceanography and Hydrology; Atmospheric Sciences; Geophysics. 7286 words.

This article describes the threat costal hazards pose to existing life in light of climate change and natural disaster. It includes an overview of flooding, extreme waves, and other...

Go to »  abstract

Coastal Hazards, Risks, and Marine Extreme Events

Eduardo Marone, Ricardo de Camargo and Julio Salcedo Castro.

P ublished online October 2017 .

Article. Subjects: Natural Disasters (Environmental Science); Oceanography and Hydrology; Atmospheric Sciences; Geophysics. 7286 words.

This article describes the threat costal hazards pose to existing life in light of climate change and natural disaster. It includes an overview of flooding, extreme waves, and other...

Go to »  abstract

Combination of surface and borehole seismic data for robust target-oriented imaging

Yi Liu, Joost van der Neut, Børge Arntsen and Kees Wapenaar.

in Geophysical Journal International

P ublished online March 2016 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 8851 words.

A novel application of seismic interferometry (SI) and Marchenko imaging using both surface and borehole data is presented. A series of redatuming schemes is proposed to combine both data...

Go to »  full text

Comment on: Tarasov, A. & Titov, K., 2013, On the use of the Cole–Cole equations in spectral induced polarization, Geophys. J. Int., 195, 352–356

James Macnae.

in Geophysical Journal International

P ublished online May 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 1161 words.

A recent paper by Tarasov and Titov suggested that the Cole–Cole conductivity models should be preferred to the Pelton resistivity model in fitting induced polarization responses. Each...

Go to »  full text

Comparative study of objective functions to overcome noise and bandwidth limitations in full waveform inversion

C.E. Jiménez Tejero, D. Dagnino, V. Sallarès and C.R. Ranero.

in Geophysical Journal International

P ublished online September 2015 .

Journal Article. Subjects: Geophysics; Oceanography and Hydrology. 7848 words.

Ongoing works on full waveform inversion (FWI) are yielding an increasing number of objective functions as alternative to the traditional L2-waveform. These studies aim at designing more...

Go to »  full text