pacific-ocean

Code and derived per-segment data for window-free recovery of flexural parameters at circum-Pacific trenches: a physics-informed neural inversion and the windowed least-squares baseline it is measured against.

GMT and Python workflow for a quantitative morphometric typology of the twenty Pacific deep-sea trenches from GEBCO bathymetry, with the derived cross-profile database.

GRASS-GIS-Fiji

Analysis code and derived segment database for morphostructural control on subduction seismicity in the Pacific Ocean: 221 trench segments parameterised morphometrically, flexurally and seismically.

R scripts drawing ridgeline plots (stacked, overlapping kernel-density ridges) of trench bathymetry and tectonics with ggridges (geom_density_ridges, jittered points, viridis gradients). Part of a Python-and-R geospatial analysis; Lemenkova (2019), Electronic Letters on Science and Engineering 15(3):81-94.

LaTeX source of the scientific report 'Morphostructural features of the deep-sea trenches in the Pacific Ocean, the problem of their origin' (P. Lemenkova, Moscow, 2021, 268 pp.).

Comprehensive comparative geomorphometric analysis of the deep-sea trenches of the Pacific Ocean from bathymetric data, using data-modelling algorithms in GMT, QGIS, Python and R. LaTeX source together with the GMT/AWK, Python and R scripts and all figures.

Python and PyGMT workflow for elastic-thickness inversion and flexural-asymmetry decomposition of twenty Pacific trench segments, with the derived per-profile parameter database.

Presentation slides: 'Accurate and Rapid Big Spatial Data Processing by Scripting Cartographic Algorithms: Advanced Seafloor Mapping of the Deep-Sea Trenches along the Margins of the Pacific Ocean' (Lemenkova), AGU 2021 workshop 'Bringing Land, Ocean, Atmosphere and Ionosphere Data to the Community for Hazard Alerts'.

LaTeX (Beamer) source of the research presentation 'Deep-Sea Trenches of the Pacific Ocean: A Comparative Analysis of the Submarine Geomorphology by Data Modeling Using GMT, QGIS, Python and R' (Lemenkova), Ocean University of China, College of Marine Geo-Sciences, Qingdao, 2019.

GMT shell script producing a shaded-relief bathymetric map of the Kuril-Kamchatka Trench (NW Pacific) from the ETOPO1 1-arc-minute grid. Companion figure for Lemenkova, Reports on Geodesy and Geoinformatics 2019, 108:9-22.

LaTeX (Beamer) source and PDF of the seminar presentation 'Morphostructure Features of the Deep-Sea Trenches in the Pacific Ocean: The Problem of Their Origin' (Lemenkova, in Russian), Laboratory of Regional Geophysics and Natural Disasters, Schmidt Institute of Physics of the Earth RAS, Moscow, 24 May 2021.

Code and derived data for the Pacific trench-fill morphology paper

Radiocarbon effect estimation off Peru and Chile with Marine20

LaTeX source for the article 'GRASS GIS Modules for Topographic and Geophysical Analysis of the ETOPO1 DEM and Raster Data: North Fiji Basin, Pacific Ocean' (Lemenkova, Geographia Napocensis 2020, 14(1):27-38). GRASS GIS geomorphometric and geophysical raster analysis of ETOPO1, EGM96 geoid and free-air gravity.

Reproducible Python/PyGMT workflow testing the geomorphic imprint of subducting seamounts and ridges on Pacific trenches — axial-depth anomaly, inner-slope scarring and along-strike segmentation — from open bathymetry with statistics and a random-forest classifier.