Seafloor Topography Estimation from Gravity : Theory and Applications / Junjun Yang.

Format:

Book

Author/Creator:

Yang, Junjun, author.

Series:

Hors Collection

Language:

English

Subjects (All):

Gravity.

Relativity.

Physical Description:

1 online resource (142 pages)

Edition:

First edition.

Place of Publication:

[Place of publication not identified] : EDP Sciences, 2023.

Summary:

No detailed description available for "Seafloor Topography Estimation from Gravity: Theory and Applications".

Contents:

Intro

Seafloor Topography Estimation from Gravity: Theory and Applications

Preface

About the Author

Contents

Introduction

Background

Previous Studies

Global Seafloor Topography Estimation from Altimetry-Derived Gravity

Sub-Ice-Shelf Seafloor Topography Estimation from Airborne Gravity

Objective

Relationship Between Topography and Gravity

Relationship in the Frequency Domain

Parker's Theory

Forsberg's Method

Relationships of Gravity Anomaly and Gravity Gradient to Topography

Admittance Theory

Advantages and Limitations of Using the Gravity Gradient

Relationship in the Spatial Domain

The Gravitational Gradients Due to a Right Rectangular Prism

The Gravity Anomalies Due to a Right Rectangular Prism

Errors Associated with Gradient Inversion Techniques

Truncation and Resolution Errors in the Forward Computation

Summary of Other Error Sources

Estimation Methodology

Seafloor Topography Estimation Based on Fourier Transform

Analysis of the Nonlinear Terms

Validity of the Linear Approximation

Introduction to the Coherency

Coherency for Finite Power Signals

Radially Symmetric Coherency

Coherency for Signals on the Sphere

Seafloor Topography Estimation Using Simulated Annealing

Introduction to the Simulated Annealing

Seafloor Topography Estimation from Gravity Gradients

Seafloor Topography Estimation from Gravity Anomalies

Difference Between Simulated Annealing and Parker's Method

Numerical Experiment

Study Area Description

Estimation Using Parker's Formulation

Data Preparation

Data Filtering

Determination of Topography-to-Gradient Admittance Scale

Results and Evaluation

Results After Including Shorter Wavelengths

Estimation Using Simulated Annealing

Analysis of the Forward Computation in the SA.

Data Preparation and SA Configuration

Results of the Simulated Annealing

Low-Pass Filtering the Estimated Seafloor Topography

Evaluation

Other Tests of the Simulated Annealing Algorithm

Comparison of the Estimation Results

Comparison with the SIO Topography Model

Comparison Between the Two Methods

Conclusions

Estimation from Airborne Gravity Gradients

Airborne Gravity Gradients and Multibeam Bathymetry

Inversion Parameters

Analysis and Removal of the Non-Terrain Effects

Results, Evaluation, and Discussion

Seafloor Topography Offshore Northeast Greenland

Data and Methods

Airborne Gravity

Bathymetric Data

Accuracy Evaluation

Seafloor Topography

Discussion

Topographic Steering of Ocean Currents

Errors Associated with Gravity Inversion Techniques

Seafloor Topography Beneath the Amery Ice Shelf, East Antarctica

Laser Altimeter and Ice-Penetrating Radar Data

Hydrographic Data

Results

New Bathymetric Model

Water Masses Arriving at the AmIS

References

Appendix A The Spherical Harmonics of the Gravity Anomaly

Appendix B Pseudo-Code for the Adaptive Simulated Annealing.

Notes:

Description based on publisher supplied metadata and other sources.

Description based on print version record.

ISBN:

9782759831975

OCLC:

1416189929