Magnetics

Description: Gridded magnetic anomaly data from various sources.

Datasets:

LCS-1: A high-resolution global model of the lithospheric magnetic field derived from CHAMP and Swarm satellite observations

Accessed from https://www.spacecenter.dk/files/magnetic-models/LCS-1/ version: scalar anomaly at Earth’s surface (WGS84 ellipsoid) for spherical harmonic degrees n=14-185

Associated papers:

Olsen, N., D. Ravat, C. C. Finlay, and L. K. Kother, LCS-1: A high-resolution global model of the lithospheric magnetic field derived from CHAMP and Swarm satellite observations, Geophys. J. Int., 211, 1461–1477, doi:10.1093/gji/ggx381, 2017

%%capture
%load_ext autoreload
%autoreload 2

from polartoolkit import fetch, maps, utils

grid = fetch.magnetics(
    version="LCS-1",
    # available options
    # region,
    # spacing,
    # registration ("g" for gridline or "p" for pixel),
    hemisphere="north",
)
utils.get_grid_info(grid)

(10000.0,
 (-3500000.0, 3500000.0, -3500000.0, 3500000.0),
 -359.858154297,
 570.593200684,
 'g')

fig = maps.plot_grd(
    grid,
    title="LCS-1 Magnetic Anomaly Data",
    cbar_label="nT",
    coast=True,
    cmap="balance+h0",
    hemisphere="north",
    hist=True,
    robust=True,
)

fig.show(dpi=200)