Log in

Relevant bibliographies by topics / Gravity field grids / Journal articles

To see the other types of publications on this topic, follow the link: Gravity field grids.

Journal articles on the topic 'Gravity field grids'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Gravity field grids.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Cao, Shujin, Peng Chen, Guangyin Lu, Yihuai Deng, Dongxin Zhang, and Xinyue Chen. "Spherical Gravity Forwarding of Global Discrete Grid Cells by Isoparametric Transformation." Mathematics 12, no. 6 (2024): 885. http://dx.doi.org/10.3390/math12060885.

Full text

Abstract:

For regional or even global geophysical problems, the curvature of the geophysical model cannot be approximated as a plane, and its curvature must be considered. Tesseroids can fit the curvature, but their shapes vary from almost rectangular at the equator to almost triangular at the poles, i.e., degradation phenomena. Unlike other spherical discrete grids (e.g., square, triangular, and rhombic grids) that can fit the curvature, the Discrete Global Grid System (DGGS) grid can not only fit the curvature but also effectively avoid degradation phenomena at the poles. In addition, since it has onl

APA, Harvard, Vancouver, ISO, and other styles

2

Isgаndаrov, E., A. Mammadov, and J. Maliyeva. "FILTRATION OF THE GRAVITATIONAL FIELD OF THE ABSHERON-BALKHAN AREA." POLISH JOURNAL OF SCIENCE, no. 86 (May 23, 2025): 22–28. https://doi.org/10.5281/zenodo.15494150.

Full text

Abstract:

The article considers the issue of filtering the gravity field using derivative and gradient methods, which are highly sensitive in identifying weak local anomalies, gravity gradient zones, marginal parts of structures, deep faults and disturbances. As is known, these anomalies also display density heterogeneities of rocks, which can be associated with oil and gas fields and other minerals. Recently, various modifications and formulas for calculating gradients and derivatives of different orientations have been developed, which emphasize various features of anomaly-forming geological structure

APA, Harvard, Vancouver, ISO, and other styles

3

Shaw, James, and Hilary Weller. "Comparison of Terrain-Following and Cut-Cell Grids Using a Nonhydrostatic Model." Monthly Weather Review 144, no. 6 (2016): 2085–99. http://dx.doi.org/10.1175/mwr-d-15-0226.1.

Full text

Abstract:

Abstract Terrain-following coordinates are widely used in operational models but the cut-cell method has been proposed as an alternative that can more accurately represent atmospheric dynamics over steep orography. Because the type of grid is usually chosen during model implementation, it becomes necessary to use different models to compare the accuracy of different grids. In contrast, here a C-grid finite-volume model enables a like-for-like comparison of terrain-following and cut-cell grids. A series of standard two-dimensional tests using idealized terrain are performed: tracer advection in

APA, Harvard, Vancouver, ISO, and other styles

4

Pilkington, M., and P. Keating. "Grid preparation for magnetic and gravity data using fractal fields." Nonlinear Processes in Geophysics 19, no. 2 (2012): 291–96. http://dx.doi.org/10.5194/npg-19-291-2012.

Full text

Abstract:

Abstract. Most interpretive methods for potential field (magnetic and gravity) measurements require data in a gridded format. Many are also based on using fast Fourier transforms to improve their computational efficiency. As such, grids need to be full (no undefined values), rectangular and periodic. Since potential field surveys do not usually provide data sets in this form, grids must first be prepared to satisfy these three requirements before any interpretive method can be used. Here, we use a method for grid preparation based on a fractal model for predicting field values where necessary.

APA, Harvard, Vancouver, ISO, and other styles

5

Chen, Longwei, and Lanbo Liu. "Fast and accurate forward modelling of gravity field using prismatic grids." Geophysical Journal International 216, no. 2 (2018): 1062–71. http://dx.doi.org/10.1093/gji/ggy480.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Zhu, Fengshun, Xin Liu, Zhen Li, Jiajia Yuan, Jinyun Guo, and Heping Sun. "High spatial resolution marine gravity trend determined from multisatellite altimeter data over Bay of Bengal." Geophysical Journal International 235, no. 3 (2023): 2257–67. http://dx.doi.org/10.1093/gji/ggad368.

Full text

Abstract:

SUMMARY Mass redistribution in the Earth system induce variations of the Earth's gravity field. Now, the time-varying gravity models from the Gravity Recovery and Climate Experiment (GRACE) mission can only estimate the large-scale gravity changes, so the high-resolution marine gravity trend (MGT) model is urgently required to detect small-scale Earth's mass migration. The sea level change is a significant response to marine gravity field change. Here, we propose to estimate the high-resolution MGT using the sea level trend (SLT). Firstly, the SLT model caused by marine mass change (MMC) on 5′

APA, Harvard, Vancouver, ISO, and other styles

7

Xia, Jianghai, Donald R. Sprowl, and Dana Adkins‐Heljeson. "Correction of topographic distortions in potential‐field data: A fast and accurate approach." GEOPHYSICS 58, no. 4 (1993): 515–23. http://dx.doi.org/10.1190/1.1443434.

Full text

Abstract:

The equivalent source concept is used in the wavenumber domain to correct distortions in potential‐field data caused by topographic relief. The equivalent source distribution on a horizontal surface is determined iteratively through forward calculation of the anomaly on the topographic surface. Convergence of the solution is stable and rapid. The accuracy of the Fourier‐based approach is demonstrated by two synthetic examples. For the gravity example, the rms error between the corrected anomaly and the desired anomaly is 0.01 mGal, which is less than 0.5 percent of the maximum synthetic anomal

APA, Harvard, Vancouver, ISO, and other styles

8

Ince, E. Sinem, Franz Barthelmes, Sven Reißland, et al. "ICGEM – 15 years of successful collection and distribution of global gravitational models, associated services, and future plans." Earth System Science Data 11, no. 2 (2019): 647–74. http://dx.doi.org/10.5194/essd-11-647-2019.

Full text

Abstract:

Abstract. The International Centre for Global Earth Models (ICGEM, http://icgem.gfz-potsdam.de/, last access: 6 May 2019) hosted at the GFZ German Research Centre for Geosciences (GFZ) is one of the five services coordinated by the International Gravity Field Service (IGFS) of the International Association of Geodesy (IAG). The goal of the ICGEM service is to provide the scientific community with a state-of-the-art archive of static and temporal global gravity field models of the Earth, and develop and operate interactive calculation and visualization services of gravity field functionals on u

APA, Harvard, Vancouver, ISO, and other styles

9

Vermeer, M. "Regularization constraints in mass point grids and their relation to gravity field stochastics." Physics and Chemistry of the Earth 23, no. 1 (1998): 13–18. http://dx.doi.org/10.1016/s0079-1946(97)00235-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Wang, Bingzhu, Edward S. Krebes, and Dhananjay Ravat. "High-precision potential-field and gradient-component transformations and derivative computations using cubic B-splines." GEOPHYSICS 73, no. 5 (2008): I35—I42. http://dx.doi.org/10.1190/1.2953291.

Full text

Abstract:

Potential-field and gradient-component transformations and derivative computations are necessary for many techniques of data enhancement, direct interpretation, and inversion. We advance new unified formulas for fast interpolation, differentiation, and integration and propose flexible high-precision algorithms to perform 3D and 2D potential-field- and gradient component transformations and derivative computations in the space domain using cubic B-splines. The spline-based algorithms are applicable to uniform or nonuniform rectangular grids for the 3D case and to regular or irregular grids for

APA, Harvard, Vancouver, ISO, and other styles

11

Byzov, Denis, and Petr Martyshko. "Three-Dimensional Modeling and Inversion of Gravity Data Based on Topography: Urals Case Study." Mathematics 12, no. 6 (2024): 837. http://dx.doi.org/10.3390/math12060837.

Full text

Abstract:

In this paper, the derivation of a concise closed form for the gravitational field of a polyhedron is presented. This formula forms the basis of the algorithm for calculating the gravitational field of an arbitrary shape body with high accuracy. Based on this algorithm, a method for gravity data inversion (creating density models of the Earth’s crust) has been developed. The algorithm can accept either regular or irregular polyhedron discretization for density model creation. The models are approximated with dense irregular grids, elements of which are polyhedrons. When performing gravity data

APA, Harvard, Vancouver, ISO, and other styles

12

Lemenkova, Polina, and Olivier Debeir. "Coherence of Bangui Magnetic Anomaly with Topographic and Gravity Contrasts across Central African Republic." Minerals 13, no. 5 (2023): 604. http://dx.doi.org/10.3390/min13050604.

Full text

Abstract:

The interactions between the geophysical processes and geodynamics of the lithosphere play a crucial role in the geologic structure of the Earth’s crust. The Bangui magnetic anomaly is a notable feature in the lithospheric structure of the Central African Republic (CAR) resulting from a complex tectonic evolution. This study reports on the coherence in the geophysical data and magnetic anomaly field analysed from a series of maps. The data used here include raster grids on free-air altimetric gravity, magnetic EMAG2 maps, geoid EGM2008 model and topographic SRTM/ETOPO1 relief. The data were pr

APA, Harvard, Vancouver, ISO, and other styles

13

Jarmołowski, Wojciech. "A priori noise and regularization in least squares collocation of gravity anomalies." Geodesy and Cartography 62, no. 2 (2013): 199–216. http://dx.doi.org/10.2478/geocart-2013-0013.

Full text

Abstract:

Abstract The paper describes the estimation of covariance parameters in least squares collocation (LSC) by the cross-validation (CV) technique called leave-one-out (LOO). Two parameters of Gauss-Markov third order model (GM3) are estimated together with a priori noise standard deviation, which contributes significantly to the covariance matrix composed of the signal and noise. Numerical tests are performed using large set of Bouguer gravity anomalies located in the central part of the U.S. Around 103 000 gravity stations are available in the selected area. This dataset, together with regular g

APA, Harvard, Vancouver, ISO, and other styles

14

Baba, Yuya, Keiko Takahashi, Takeshi Sugimura, and Koji Goto. "Dynamical Core of an Atmospheric General Circulation Model on a Yin–Yang Grid." Monthly Weather Review 138, no. 10 (2010): 3988–4005. http://dx.doi.org/10.1175/2010mwr3375.1.

Full text

Abstract:

Abstract The three-dimensional dynamical core of an atmospheric general circulation model employing Yin–Yang grid is developed and examined. Benchmark test cases based on the shallow-water model configuration are first performed to examine the validity of two-dimensional calculations. The experiments show that the model simulates reasonable flow fields with second-order accuracy. The model validation is then extended to three-dimensional features where the capability of the dynamical core on the Yin–Yang grid has not been tested before: the global mountain gravity wave, long-term integration,

APA, Harvard, Vancouver, ISO, and other styles

15

Lemenkova, Polina, and Olivier Debeir. "Coherence of Bangui Magnetic Anomaly with Topographic and Gravity Contrasts across Central African Republic." Minerals 13, no. 5 (2023): 604. https://doi.org/10.5281/zenodo.7870446.

Full text

Abstract:

The interactions between the geophysical processes and geodynamics of the lithosphere play a crucial role in the geologic structure of the Earth’s crust. The Bangui magnetic anomaly is a notable feature in the lithospheric structure of the Central African Republic (CAR) resulting from a complex tectonic evolution. This study reports on the coherence in the geophysical data and magnetic anomaly field analysed from a series of maps. The data used here include raster grids on free-air altimetric gravity, magnetic EMAG2 maps, geoid EGM2008 model and topographic SRTM/ETOPO1 relief. The data w

APA, Harvard, Vancouver, ISO, and other styles

16

Natsiopoulos, Dimitrios A., Elisavet G. Mamagiannou, Eleftherios A. Pitenis, Georgios S. Vergos, and Ilias N. Tziavos. "GOCE Downward Continuation to the Earth’s Surface and Improvements to Local Geoid Modeling by FFT and LSC." Remote Sensing 15, no. 4 (2023): 991. http://dx.doi.org/10.3390/rs15040991.

Full text

Abstract:

One of the main applications of the gravity field and steady-state Ocean Circulation Explorer (GOCE) satellite data is their combination with local gravity anomalies for geoid and gravity field modeling purposes. The aim of the present paper was the determination of an improved geoid model for the wider Hellenic area, using original GOCE SGG data filtered to retain only useful signals inside the measurement bandwidth (MBW) of the satellite. The filtered SGGs, originally at the satellite altitude, were projected to a mean orbit (MO) and then downward continued to the Earth’s surface (ES) in ord

APA, Harvard, Vancouver, ISO, and other styles

17

Hoch, Kielan K. W., Christopher A. Theissen, Travis S. Barman, et al. "JWST-TST High Contrast: Spectroscopic Characterization of the Benchmark Brown Dwarf HD 19467 B with the NIRSpec Integral Field Spectrograph." Astronomical Journal 168, no. 4 (2024): 187. http://dx.doi.org/10.3847/1538-3881/ad6cd3.

Full text

Abstract:

Abstract We present the atmospheric characterization of the substellar companion HD 19467 B as part of the pioneering James Webb Space Telescope Guaranteed Time Observer program to obtain moderate resolution spectra (R ∼ 2700, 3–5 μm) of a high-contrast companion with the NIRSpec integral field unit (IFU). HD 19467 B is an old, ∼9 Gyr, companion to a solar-type star with multiple measured dynamical masses. The spectra show detections of CO, CO2, CH4, and H2O. We forward model the spectra using Markov Chain Monte Carlo methods and atmospheric model grids to constrain the effective temperature a

APA, Harvard, Vancouver, ISO, and other styles

18

Pereira, Ayelen, Cecilia Cornero, Ana C. O. C. Matos, M. Cristina Pacino, and Denizar Blitzkow. "Study of water storage variations at the Pantanal wetlands area from GRACE monthly mass grids." Journal of Geodetic Science 9, no. 1 (2019): 133–43. http://dx.doi.org/10.1515/jogs-2019-0013.

Full text

Abstract:

Abstract The continental water storage is significantly in-fluenced by wetlands, which are highly affected by climate change and anthropogenic influences. The Pantanal, located in the Paraguay river basin, is one of the world’s largest and most important wetlands because of the environmental biodiversity that represents. The satellite gravity mission GRACE (Gravity Recovery And Climate Experiment) provided until 2017 time-variable Earth’s gravity field models that reflected the variations due to mass transport processes-like continental water storage changes-which allowed to study environments

APA, Harvard, Vancouver, ISO, and other styles

19

Bazhenov, V. G., and N. S. Dyukina. "IMPROVING THE EFFICIENCY OF NUMERICAL SIMULATION OF SEISMIC VIBRATIONS OF BURIED STRUCTURES, TAKING INTO ACCOUNT THE INTERACTION WITH THE GROUND BASE." Problems of Strength and Plasticity 84, no. 4 (2023): 470–80. http://dx.doi.org/10.32326/1814-9146-2023-85-4-470-480.

Full text

Abstract:

The calculation of buried large-sized structures for specified seismic impacts should take into account the field of gravity, contact interaction with the ground. The representation of the boundless half-space of the soil by a limited finite element domain requires taking measures to exclude the influence of boundary effects on the solution. The article proposes and analyzes a set of measures to eliminate edge effects: an algorithm for restoring kinematic load according to an experimental seismogram, the use of superimposed grids to separate the waves incident and radiated from the structure,

APA, Harvard, Vancouver, ISO, and other styles

20

Zhu, Chengcheng, Jinyun Guo, Cheinway Hwang, Jinyao Gao, Jiajia Yuan, and Xin Liu. "How HY-2A/GM altimeter performs in marine gravity derivation: assessment in the South China Sea." Geophysical Journal International 219, no. 2 (2019): 1056–64. http://dx.doi.org/10.1093/gji/ggz330.

Full text

Abstract:

SUMMARY HY-2A is China's first satellite altimeter mission, launched in Aug. 2011. Its geodetic mission (GM) started from 2016 March 30 till present, collecting sea surface heights for about five 168-d cycles. To test how the HY-2A altimeter performs in marine gravity derivation, we use the least-squares collocation method to determine marine gravity anomalies on 1′ × 1′ grids around the South China Sea (covering 0°–30°N, 105°E–125°E) from the HY-2A/GM-measured geoid gradients. We assess the qualities of the HY-2A/GM-derived gravity over different depths and areas using the bias and tilt-adjus

APA, Harvard, Vancouver, ISO, and other styles

21

Ogarko, Vitaliy, Kim Frankcombe, Taige Liu, Jeremie Giraud, Roland Martin, and Mark Jessell. "Tomofast-x 2.0: an open-source parallel code for inversion of potential field data with topography using wavelet compression." Geoscientific Model Development 17, no. 6 (2024): 2325–45. http://dx.doi.org/10.5194/gmd-17-2325-2024.

Full text

Abstract:

Abstract. We present a major release of the Tomofast-x open-source gravity and magnetic inversion code that incorporates several functionalities enhancing its performance and applicability for both industrial and academic studies. The code has been re-designed with a focus on real-world mineral exploration scenarios, while offering flexibility for applications at regional scale or for crustal studies. This new version includes several major improvements: magnetisation vector inversion, inversion of multi-component magnetic data, wavelet compression, improved handling of topography with support

APA, Harvard, Vancouver, ISO, and other styles

22

Zhu, Fengshun, Jinyun Guo, Huiying Zhang, Lingyong Huang, Heping Sun, and Xin Liu. "SDUST2020MGCR: a global marine gravity change rate model determined from multi-satellite altimeter data." Earth System Science Data 16, no. 5 (2024): 2281–96. http://dx.doi.org/10.5194/essd-16-2281-2024.

Full text

Abstract:

Abstract. Investigating the global time-varying gravity field mainly depends on GRACE/GRACE-FO gravity data. However, satellite gravity data exhibit low spatial resolution and signal distortion. Satellite altimetry is an important technique for observing the global ocean and provides many consecutive years of data, which enables the study of high-resolution marine gravity variations. This study aims to construct a high-resolution marine gravity change rate (MGCR) model using multi-satellite altimetry data. Initially, multi-satellite altimetry data and ocean temperature–salinity data from 1993

APA, Harvard, Vancouver, ISO, and other styles

23

Sánchez, Matías G., Murray M. Allan, Craig J. R. Hart, and James K. Mortensen. "Extracting ore-deposit-controlling structures from aeromagnetic, gravimetric, topographic, and regional geologic data in western Yukon and eastern Alaska." Interpretation 2, no. 4 (2014): SJ75—SJ102. http://dx.doi.org/10.1190/int-2014-0104.1.

Full text

Abstract:

Aeromagnetic lineaments interpreted from reduced-to-pole (RTP) magnetic grids were compared with gravity, topography, and field-based geologic maps to infer regional structural controls on hydrothermal mineral occurrences in a poorly exposed portion of the North American Cordillera in western Yukon and eastern Alaska. High-frequency and variable-intensity aeromagnetic lineaments corresponding to discontinuities with an aeromagnetic domain change were interpreted as steep-dipping and either magnetite-destructive or magnetite-additive faults. These structures were interpreted to be predominantly

APA, Harvard, Vancouver, ISO, and other styles

24

Barnes, Gary, and Joseph Barraud. "Imaging geologic surfaces by inverting gravity gradient data with depth horizons." GEOPHYSICS 77, no. 1 (2012): G1—G11. http://dx.doi.org/10.1190/geo2011-0149.1.

Full text

Abstract:

The nonuniqueness problem that occurs when inverting potential field data is well known. It can, however, be surmounted by jointly inverting these data with independent data sets, incorporating depth information and regularizing the solution. The goal is to produce a geologic model that is compatible with all measured quantities, does not exceed any prescribed limits, and is geologically plausible. To achieve this, we have developed a spatially based surface inversion algorithm that solves for the geometric interface between geologic bodies. The bodies are constructed from grids of rectangular

APA, Harvard, Vancouver, ISO, and other styles

25

Takahashi, Diego, Vanderlei C. Oliveira Jr., and Valéria C. F. Barbosa. "Convolutional equivalent layer for gravity data processing." GEOPHYSICS 85, no. 6 (2020): G129—G141. http://dx.doi.org/10.1190/geo2019-0826.1.

Full text

Abstract:

We have developed an efficient and very fast equivalent-layer technique for gravity data processing by modifying an iterative method grounded on an excess mass constraint that does not require the solution of linear systems. Taking advantage of the symmetric block-Toeplitz Toeplitz-block (BTTB) structure of the sensitivity matrix that arises when regular grids of observation points and equivalent sources (point masses) are used to set up a fictitious equivalent layer, we develop an algorithm that greatly reduces the computational complexity and RAM memory necessary to estimate a 2D mass distri

APA, Harvard, Vancouver, ISO, and other styles

26

Gruzdev,, R., and I. Rylsky. "DETERMINATION OF OPTIMAL PARAMETERS FOR CALCULATING TERRAIN CORRECTIONS BASED ON DIGITAL TERRAIN MODELS (ON THE EXAMPLE OF EASTERN TRANSBAIKALIA)." TRANSBAIKAL STATE UNIVERSITY JOURNAL 27, no. 8 (2021): 12–25. http://dx.doi.org/10.21209/2227-9245-2021-27-8-12-25.

Full text

Abstract:

The study of corrections for the influence of terrain is a very popular and significant procedure in the production of high-precision gravimetric work. The results of such studies allow us to determine the optimal parameters for calculating terrain corrections, which helps to reduce the error in calculating the anomaly of the force of gravity in the Buge reduction and, accordingly, leads to an increase in the quality of the interpreted material. Therefore, the improvement of the methodology for calculating corrections for terrain is of particular interest for gravity exploration today and is a

APA, Harvard, Vancouver, ISO, and other styles

27

Salem, Ahmed, Chris Green, Samuel Cheyney, J. Derek Fairhead, Essam Aboud, and Simon Campbell. "Mapping the depth to magnetic basement using inversion of pseudogravity: Application to the Bishop model and the Stord Basin, northern North Sea." Interpretation 2, no. 2 (2014): T69—T78. http://dx.doi.org/10.1190/int-2013-0105.1.

Full text

Abstract:

Magnetic depth estimation methods are routinely used to map the depth of sedimentary basins by assuming that the sediments are nonmagnetic and underlain by magnetic basement rocks. Most of these methods generate basement depth estimates at discrete points. Converting these depth estimates into a grid or map form often requires the application of qualitative methods. The reason for this is twofold: first, in deeper parts of basins, there is generally a scarcity of depth estimates and those that have been determined tend to be biased toward the shallower basement structures close to the basin ed

APA, Harvard, Vancouver, ISO, and other styles

28

Cordell, Lindrith. "A scattered equivalent‐source method for interpolation and gridding of potential‐field data in three dimensions." GEOPHYSICS 57, no. 4 (1992): 629–36. http://dx.doi.org/10.1190/1.1443275.

Full text

Abstract:

Potential‐field geophysical data observed at scattered discrete points in three dimensions can be interpolated (gridded, for example, onto a level surface) by relating the point data to a continuous function of equivalent discrete point sources. The function used here is the inverse‐distance Newtonian potential. The sources, located beneath some of the data points at a depth proportional to distance to the nearest neighboring data point, are determined iteratively. Areas of no data are filled by minimum curvature. For two‐dimensional (2-D) data (all data points at the same elevation), grids ca

APA, Harvard, Vancouver, ISO, and other styles

29

Wu, Ping-Chen. "A CFD-Based Correction for Ship Mass and Longitudinal Center of Gravity to Improve Resistance Simulation." Mathematics 13, no. 11 (2025): 1788. https://doi.org/10.3390/math13111788.

Full text

Abstract:

In this study, a correction procedure for ship mass and its longitudinal location of center of gravity suitable for a simulation environment is proposed in OpenFOAM v6.0. The concept is implemented ensuring static equilibrium and an approximately zero-pitch moment on the ship before the simulation. The viscous flow field around the ship in calm water is simulated using the VOF (Volume of Fluid) free surface two-phase and SST (Shear Stress Transport) k–ω turbulence models. Using static mesh, the resistance error of medium and fine grids is 4%, on average, against the experimental value. As the

APA, Harvard, Vancouver, ISO, and other styles

30

Thiele, M. R. R., R. P. P. Batycky, S. Pöllitzer, and T. Clemens. "Polymer-Flood Modeling Using Streamlines." SPE Reservoir Evaluation & Engineering 13, no. 02 (2010): 313–22. http://dx.doi.org/10.2118/115545-pa.

Full text

Abstract:

Summary The successful design of a polymer flood relies on the ability to properly model the in-situ distribution of polymer concentration while accounting for its effects on fluid properties such as increasing water viscosity as a function of polymer concentration and loss of polymer caused by adsorption. Despite advances in numerical techniques and computer hardware, the numerical modeling of polymer floods using Eulerian-based approaches such as finite difference (FD) remains a challenge: Coarse grids tend to excessively smear concentration fronts, masking the true impact of polymers; yet i

APA, Harvard, Vancouver, ISO, and other styles

31

Lemenkova, Polina. "A Script-Driven Approach to Mapping Satellite-Derived Topography and Gravity Data Over the Zagros Fold-and-Thrust Belt, Iran." Artificial Satellites 57, no. 2 (2022): 110–37. http://dx.doi.org/10.2478/arsa-2022-0006.

Full text

Abstract:

Abstract Integrated geophysical mapping benefits from visualizing multi-source datasets including gravity and satellite altimetry data using 2D and 3D techniques. Applying scripting cartographic approach by R language and GMT supported by traditional mapping in QGIS is presented in this paper with a case study of Iranian geomorphology and a special focus on Zagros Fold-and-Thrust Belt, a unique landform of the country affected by complex geodynamic structure. Several modules of GMT and ’tmap’ and ’raster’ packages of R language were shown to illustrate the efficiency of the console-based mappi

APA, Harvard, Vancouver, ISO, and other styles

32

Lemenkova, Polina. "A Script-Driven Approach to Mapping Satellite-Derived Topography and Gravity Data Over the Zagros Fold-and-Thrust Belt, Iran." Artificial Satellites 57, no. 2 (2022): 110–37. https://doi.org/10.5281/zenodo.6922181.

Full text

Abstract:

Integrated geophysical mapping benefits from visualizing multi-source datasets including gravity and satellite altimetry data using 2D and 3D techniques. Applying scripting cartographic approach by R language and GMT supported by traditional mapping in QGIS is presented in this paper with a case study of Iranian geomorphology and a special focus on Zagros Fold-and-Thrust Belt, a unique landform of the country affected by complex geodynamic structure. Several modules of GMT and 'tmap' and 'raster' packages of R language were shown to illustrate the efficiency of the console-base

APA, Harvard, Vancouver, ISO, and other styles

33

Jähn, M., O. Knoth, M. König, and U. Vogelsberg. "ASAM v2.7: a compressible atmospheric model with a Cartesian cut cell approach." Geoscientific Model Development 8, no. 2 (2015): 317–40. http://dx.doi.org/10.5194/gmd-8-317-2015.

Full text

Abstract:

Abstract. In this work, the fully compressible, three-dimensional, nonhydrostatic atmospheric model called All Scale Atmospheric Model (ASAM) is presented. A cut cell approach is used to include obstacles and orography into the Cartesian grid. Discretization is realized by a mixture of finite differences and finite volumes and a state limiting is applied. Necessary shifting and interpolation techniques are outlined. The method can be generalized to any other orthogonal grids, e.g., a lat–long grid. A linear implicit Rosenbrock time integration scheme ensures numerical stability in the presence

APA, Harvard, Vancouver, ISO, and other styles

34

Liu, Lijun, Zhaoqin Huang, Jun Yao, Yuan Di, and Yu-Shu Wu. "An Efficient Hybrid Model for 3D Complex Fractured Vuggy Reservoir Simulation." SPE Journal 25, no. 02 (2020): 907–24. http://dx.doi.org/10.2118/199899-pa.

Full text

Abstract:

Summary Fractured vuggy reservoir is a typical type of carbonate reservoir. The 3D complex fracture networks and Stokes flow inside vugs make fractured vuggy reservoir simulation remain a challenging problem. Most of the proposed models in previous studies are computation consuming, which cannot meet with the demand of field application. In this paper, a novel and efficient hybrid model, consisting of a modified embedded discrete fracture model (EDFM) and a vug model, is proposed to simulate multiphase flow in 3D complex fractured vuggy reservoirs. The modified EDFM improves the fracture-discr

APA, Harvard, Vancouver, ISO, and other styles

35

Baker, R. O., F. Kuppe, S. Chugh, R. Bora, S. Stojanovic, and R. Batyck. "Full-Field Modeling Using Streamline-Based Simulation: Four Case Studies." SPE Reservoir Evaluation & Engineering 5, no. 02 (2002): 126–34. http://dx.doi.org/10.2118/77172-pa.

Full text

Abstract:

Summary Modern streamline-based reservoir simulators are able to account for actual field conditions such as 3D multiphase flow effects, reservoir heterogeneity, gravity, and changing well conditions. A streamline simulator was used to model four field cases, with approximately 400 wells and 150,000 gridblocks. History-match run times were approximately 1 CPU hour per run, with the final history matches completed in approximately 1 month per field. In all field cases, a high percentage of wells were history matched within the first two to three runs. Streamline simulation not only enables a ra

APA, Harvard, Vancouver, ISO, and other styles

36

Gruzdev, R., and I. Rylsky. "THE USE OF AIRBORNE LIDARS IN HIGH-PRECISION GRAVITY PROSPECTING (ON THE EXAMPLE OF EASTERN TRANSBAIKALIA)." TRANSBAIKAL STATE UNIVERSITY JOURNAL 28, no. 2 (2022): 6–18. http://dx.doi.org/10.21209/2227-9245-2022-28-2-6-18.

Full text

Abstract:

In the production of high-precision gravimetric studies at ore deposits, an important factor is the methodical correctness of the work, which directly affects the subsequent costs and life cycle of a geological exploration enterprise. It is known, that gravimetric survey, in addition to the actual stage of measurements on the ground, includes the stage of eliminating errors introduced into the measurements by external fields and objects, in particular, the terrain. Methods existing and adopted at the state level involve the use of materials from cartographic funds (topographic maps at a scale

APA, Harvard, Vancouver, ISO, and other styles

37

Lenzo, Raïs Seki, Munezero Ntibahanana, Tondozi Keto, et al. "Machine learning for the prediction and Analysis of Bouguer Gravity anomaly of the Kiri uplift in Congo sedimentary Basin." International Journal of Advances in Scientific Research and Engineering 08, no. 07 (2022): 24–46. http://dx.doi.org/10.31695/ijasre.2022.8.7.3.

Full text

Abstract:

Bouguer gravity anomalies (BGA) play an important role in exploration of mineral resources. Allowing the delineation of large geological structures, BGA participate into discovery of the deposits. However, the Kiri uplift region where several oil seeps have been recognized faces sparse coverage of data due to the difficult conditions of data acquisition on the field. This situation increases the non-uniqueness and nonlinearity problems of the solution using inverse methods. Although, potentially good at quantifying uncertainties, inverse approaches involve enormous computational tasks. We used

APA, Harvard, Vancouver, ISO, and other styles

38

Jacques, Alexander A., John D. Horel, Erik T. Crosman, and Frank L. Vernon. "Tracking Mesoscale Pressure Perturbations Using the USArray Transportable Array." Monthly Weather Review 145, no. 8 (2017): 3119–42. http://dx.doi.org/10.1175/mwr-d-16-0450.1.

Full text

Abstract:

Mesoscale convective phenomena induce pressure perturbations that can alter the strength and magnitude of surface winds, precipitation, and other sensible weather, which, in some cases, can inflict injuries and damage to property. This work extends prior research to identify and characterize mesoscale pressure features using a unique resource of 1-Hz pressure observations available from the USArray Transportable Array (TA) seismic field campaign. A two-dimensional variational technique is used to obtain 5-km surface pressure analysis grids every 5 min from 1 March to 31 August 2011 from the TA

APA, Harvard, Vancouver, ISO, and other styles

39

Hoch, Kielan K. W., Quinn M. Konopacky, Travis S. Barman, et al. "Moderate-resolution K-band Spectroscopy of the Substellar Companion VHS 1256 b." Astronomical Journal 164, no. 4 (2022): 155. http://dx.doi.org/10.3847/1538-3881/ac84d4.

Full text

Abstract:

Abstract We present moderate-resolution (R ∼ 4000) K-band spectra of the planetary-mass companion VHS 1256 b. The data were taken with the OSIRIS integral field spectrograph at the W.M. Keck Observatory. The spectra reveal resolved molecular lines from H2O and CO. The spectra are compared to custom PHOENIX atmosphere model grids appropriate for young, substellar objects. We fit the data using a Markov chain Monte Carlo forward-modeling method. Using a combination of our moderate-resolution spectrum and low-resolution broadband data from the literature, we derive an effective temperature of 124

APA, Harvard, Vancouver, ISO, and other styles

40

Carpenter, Chris. "Innovation, Integration Enable Success in Guyana-Suriname Basin." Journal of Petroleum Technology 75, no. 02 (2023): 92–94. http://dx.doi.org/10.2118/0223-0092-jpt.

Full text

Abstract:

_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper OTC 30946, “Innovation and Integration: Exploration History, ExxonMobil, and the Guyana-Suriname Basin,” by Audrey L. Varga, Matthew R. Chandler, and Worth B. Cotton, ExxonMobil, et al. The paper has not been peer reviewed. Copyright 2021 Offshore Technology Conference. Reproduced by permission. _ Exploration in the Guyana-Suriname Basin has been a decades-long endeavor, including technical challenges and a lengthy history of drilling with no offshore success before the 2015 Liza discovery. The colle

APA, Harvard, Vancouver, ISO, and other styles

41

Rubin, Barry, and W. Lloyd Buchanan. "A General Purpose Thermal Model." Society of Petroleum Engineers Journal 25, no. 02 (1985): 202–14. http://dx.doi.org/10.2118/11713-pa.

Full text

Abstract:

Abstract This paper describes a fully implicit four-phase (oil, water, gas, solid fuel) numerical reservoir model for simulating hot water injection, steam injection, dry combustion, and wet combustion in one, two, or three dimensions and in either a Cartesian, radial, or curvilinear geometry. The simulator rigorously models fluid flow, heat transfer (convective and conductive), heat loss to formation, fluid vaporization/condensation, and chemical reactions. Any number of oil or gas phase components may be specified, along with any number of solid phase components (fuel and catalysts). The sim

APA, Harvard, Vancouver, ISO, and other styles

42

Summerell, G. K., T. I. Dowling, D. P. Richardson, J. Walker, and B. Lees. "Modelling current parna distribution in a local area." Soil Research 38, no. 4 (2000): 867. http://dx.doi.org/10.1071/sr98100.

Full text

Abstract:

Parna is a wind-blown clay, mobilised from inland Australia as the result of a series of intermittent high wind events during the Quaternary. Parna can be recognised on the basis of colour, texture, distributional patterns, and pedology. Parna deposits have been recorded across a wide area of south eastern Australia and have influenced the local pedology and hydrology. In some cases parna has increased soil sodicity and the potential for dryland salinisation. Predicting its spatial distribution is useful when considering agricultural potential and in assessing the risk and spatial spread of dr

APA, Harvard, Vancouver, ISO, and other styles

43

İsgаndаrov, E., and R. Khankishiyev. "POSSIBILITIES OF ANALYTICAL CONTINUATION OF POTENTIAL FIELDS." Norwegian Journal of development of the International Science, no. 106 (April 12, 2023): 13–18. https://doi.org/10.5281/zenodo.7827942.

Full text

Abstract:

<strong>Abstract</strong> The article is devoted to possibilities analytical continuation of potential fields, the solution of which plays an important role in the geological interpretation of the observed anomalies in gravity and maqnetic prospecting. The possibilities of analytical continuation of potential fields are analyzed on the example of the analytical continuation of the gravitational field from homogeneous geological bodies of a sylindric shape located at a certain depth. As is known, the analytical continuation of fields refers to one of the methods for transforming gravimagnetic f

APA, Harvard, Vancouver, ISO, and other styles

44

Lemenkova, Polina. "GRASS GIS for topographic and geophysical mapping of the Peru-Chile Trench." Forum geografic 19, no. 2 (2021): 143–57. https://doi.org/10.5281/zenodo.4570553.

Full text

Abstract:

The study area is located along the western continental margins of South America, Peru-Chile Trench south-east Pacific Ocean, geographically encompasses 90° to 60°W longitude and 55°S to 0° latitude. The study aims to perform a spatial analysis using GRASS GIS approach applied for processing and visualizing topographic and geophysical data on the study area. Data include following raster grids: topographic SRTM_15PLUS raster grid with 15 arc-second resolution, geoid model (EGM96), geophysical fields and gravity maps (marine free-air gravity and vertically corrected free-air gra

APA, Harvard, Vancouver, ISO, and other styles

45

Carpenter, Chris. "Workflow Enables Technoeconomic Optimization of Underground Hydrogen Storage in Aquifers." Journal of Petroleum Technology 77, no. 03 (2025): 40–42. https://doi.org/10.2118/0325-0040-jpt.

Full text

Abstract:

_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 220044, “Technoeconomic Optimization of Underground Hydrogen Storage in Aquifers,” by Behzad Amiri, SPE, Mojtaba Ghaedi, and Pål Østebø Andersen, SPE, University of Stavanger, et al. The paper has not been peer reviewed. _ Serious concerns exist about the economic feasibility of underground hydrogen (H2) storage (UHS) in aquifers. The authors’ objective is to investigate the use of an optimization workflow to maximize both H2 storage and net present value (NPV), consequently obtaining an optimal

APA, Harvard, Vancouver, ISO, and other styles

46

Xu, Chenyang, Zhijun Huo, and Gaetano Giunta. "Numerical Simulation of Gravity Anomaly Based on the Unstructured Element Grid and Finite Element Method." Mathematical Problems in Engineering 2020 (September 29, 2020): 1–9. http://dx.doi.org/10.1155/2020/3604084.

Full text

Abstract:

Finite element method is an important method to solve mathematical problems in engineering. Many mathematical equations are difficult to solve, but it becomes very simple after using the finite element method. In this paper, the finite element method is applied to the calculation of gravity anomaly. First, the variational equation of gravity anomaly calculation is established, and then the gravity anomaly value ten times the distance away from the anomaly body is used as the boundary condition. By comparing the gravity anomaly obtained by solving the stiffness matrix with the analytical soluti

APA, Harvard, Vancouver, ISO, and other styles

47

Johns, R. T., P. Sah, and R. Solano. "Effect of Dispersion on Local Displacement Efficiency for Multicomponent Enriched-Gas Floods Above the Minimum Miscibility Enrichment." SPE Reservoir Evaluation & Engineering 5, no. 01 (2002): 4–10. http://dx.doi.org/10.2118/75806-pa.

Full text

Abstract:

Summary Recent research on four-component 1D displacements has shown that enriching the gas above the minimum miscibility enrichment (MME) can increase oil recovery substantially for certain systems. Research has shown further that the oil-recovery increase can be very sensitive to the level of dispersion at the enrichment chosen. The main focus of this paper is to extend the research on four-component systems to displacements of multicomponent oils and gases in which the recovery is affected by dispersion and enrichment. We consider here a 12-component oil displaced by solvents enriched above

APA, Harvard, Vancouver, ISO, and other styles

48

Li, Huoqing, Junjian Liu, Hailiang Zhang, et al. "Performance Evaluation of Sub-Grid Orographic Parameterization in the WRF Model over Complex Terrain in Central Asia." Atmosphere 11, no. 11 (2020): 1164. http://dx.doi.org/10.3390/atmos11111164.

Full text

Abstract:

The terrain of Central Asia is complex and rugged over mountains. Consequently, wind speed is overestimated over mountains and plains when using the Weather Research Forecast (WRF) model in winter. To solve this problem, three different simulations (named as control simulation (CRTL), gravity waves (GWD), and flow-blocking drag (FBD), respectively) were designed to investigate the impact of sub-grid orography (gravity waves and flow-blocking drag) on wind forecasts. The results illustrated that near-surface wind-speed overestimations were alleviated when sub-grid orographic drag was used in GW

APA, Harvard, Vancouver, ISO, and other styles

49

Lemenkova, Polina. "Mapping Beaufort Sea Topography and Geophysical Settings Using High-Resolution Geospatial Data and GMT." Geografické informácie 24, no. 1 (2020): 4–18. https://doi.org/10.17846/GI.2020.24.1.4-18.

Full text

Abstract:

The papers presents an integrated processing of the high-resolution thematic data covering the area of the Beaufort Sea, a marginal sea of the Arctic Ocean, northern Canada and Alaska. Five thematic maps of the Beaufort Sea, Arctic Ocean are presented. The cartographic techniques were performed by Generic Mapping Tools (GMT) scripting toolset. The methodology presents the integration of the multi-source high-resolution thematic datasets: bathymetric GEBCO, IBCAO, topographic GLOBE, sediment thickness GlobSed, EGM2008 geoid model, GMT vector layers and geophysical gravity model from CryoSat-2 a

APA, Harvard, Vancouver, ISO, and other styles

50

Masson, Sébastien, Swen Jullien, Eric Maisonnave, et al. "An updated non-intrusive, multi-scale, and flexible coupling interface in WRF 4.6.0." Geoscientific Model Development 18, no. 4 (2025): 1241–63. https://doi.org/10.5194/gmd-18-1241-2025.

Full text

Abstract:

Abstract. The Weather Research and Forecasting (WRF) model has been widely used for various applications, especially for solving mesoscale atmospheric dynamics. Its high-order numerical schemes and nesting capability enable high spatial resolution. However, a growing number of applications are demanding more realistic simulations through the incorporation of coupling with new model compartments and an increase in the complexity of the processes considered in the model (e.g., ocean, surface gravity wave, land surface, and chemistry). The present paper details the development and the functionali

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!