A5024245797- Geophysics and Gravity Measurements
- Geophysical and Geoelectrical Methods
- GNSS positioning and interference
- Geomagnetism and Paleomagnetism Studies
- Geological Modeling and Analysis
- Seismic Imaging and Inversion Techniques
- Geological and Geophysical Studies
- Methane Hydrates and Related Phenomena
- Oceanographic and Atmospheric Processes
- Landslides and related hazards
- Geological formations and processes
- Inertial Sensor and Navigation
- Cryospheric studies and observations
- Wind and Air Flow Studies
- Statistical and numerical algorithms
- Ocean Acidification Effects and Responses
- Meteorological Phenomena and Simulations
- Geochemistry and Geologic Mapping
- Marine and coastal ecosystems
- Historical Geography and Cartography
- Geology and Paleoclimatology Research
- Remote Sensing and Land Use
- Flood Risk Assessment and Management
- Arctic and Antarctic ice dynamics
Xiangtan University
2023-2024
Shandong University of Science and Technology
2021-2023
Leibniz University Hannover
2014-2021
Abstract We present an accurate method for the calculation of gravitational potential (GP), vector (GV), and gradient tensor (GGT) a tesseroid, considering density model in form polynomial up to cubic order along vertical direction. The solves volume integral equations effects due tesseroid by Gauss–Legendre quadrature rule. A two-dimensional adaptive subdivision technique, which automatically divides tesseroids near computation point into smaller elements, is applied improve computational...
SUMMARY The gravity-geological method (GGM) is an approach that utilizes marine gravity anomalies (GAs) and shipborne bathymetric data to invert seafloor topography by resolving short-wavelength GAs through the Bouguer Plate approximation. Such approximation ignores non-linear effects caused surrounding topographical undulations actually exist in GAs, thus leaving space for further modification of GGM. This study thoroughly derives relationship between GA, as well formula Then, we propose a...
Abstract Bathymetry data over lake areas are not included in the current and previous NGS (National Geodetic Survey) geoid models. Lake surfaces simply treated as land during modeling regardless of apparent density difference between water rock, resulting artificial masses that distort model from actual gravity field corresponding surface. In this study, compiled high-resolution bathymetry provided by National Centers for Environmental Information used to identify real volume bodies. Under...
SUMMARY In this study, we developed a new method that can significantly accelerate the forward modelling of gravity fields generated by large-scale tesseroids while keeping computational accuracy as high possible. The cost efficiency is only works under assumptions (1) all in same latitude band have horizontal dimension, (2) computation points are located at surface level and aligned with centres (3) each tesseroid has constant or linearly varying density. first integrates kernel function...
In local quasi-geoid modeling, the residual terrain modeling (RTM) method is often used to remove short-wavelength gravity field signals from measured on ground in order obtain a regularized and smooth that suited for interpolation modeling. Accurate computation of RTM corrections plays crucial role computing an accurate quasi-geoid, it requires set fine-tuned parameters, including combination DEMs with different resolutions suitably representing real topography, choice integration radius...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 622:67-82 (2019) - DOI: https://doi.org/10.3354/meps13001 Phytoplankton communities and size-fractioned chlorophyll a in newly opened summer waters of central Arctic Ocean Yu Wang*, Jian-hua Kang*, Peng Xiang, You-yin Ye, He-shan Lin, Mao Lin** Laboratory Biology Ecology, Third Institute Oceanography,...
Numerical methods like the Finite Element Methods (FEM) or (FVM) are widely used in many engineering applications to solve boundary value problems that hard find rigorous analytical solutions. These numerical have been also applied geodesy previous studies regardless of its huge computation demands. They arisen due fact upper condition was usually set up at satellite orbit level, hundreds kilometers above Earth. The relatively large distances between bottom Earth' s surface, and even...
<p>Bathymetric data over lake areas are not included in previous NGS (National Geodetic Survey) geoid model computations. Mean surfaces used as the bare rock surface during modeling. This approximation treats water body rocks with same size, and causes errors that can be avoided. study uses bathymetric to rigorously compute volume of bodies instead treating them rocks, To make fair comparisons show effects clearly, three sets models generated theory currently at NGS,...
The “non-harmonicity” problem, as one of the main problems in residual terrain modelling (RTM) method, would involve more than 200 mGal errors gravity field determination over Himalaya area. To deal with it, there are five harmonic correction (HC) methods, i.e., condensation regularized downward continuation method Taylor series expansions (TS), spherical harmonics (SH), complete HC and Kadlec's being provided previous studies. However, their performances not studied nor...
In local and regional quasi-geoid modeling, the residual terrain modeling (RTM) method is often used to remove short-wavelength gravity field signals from measured both on ground up in air, order obtain regularized smooth which suited for interpolation modeling. Accurate computation of RTM corrections requires a set fine-tuned parameters terms forward technique, digital elevation model (DEM), reference topography, integration radius inner zone outer zone. To our limited knowledge, this has...
<p>Topographic reduction is one of the most imperative steps in geoid modeling, where gravity field inside masses needs to be modeled. This quite challenging because no can measure topography at a desired resolution (only very limited number borehole measurements are available whole world). Therefore, topographic mass modeling usually treated either by residual terrain (RTM) or Helmert’s 2<sup>nd</sup> condensation among other...
Abstract The article: “Gravity Field Modeling Using Tesseroids with Variable Density in the Vertical Direction”, written by Miao Lin, Heiner Denker and Jürgen Müller, was originally published electronically on publisher’s internet portal 26 March 2020 without open access.