Is the lunar magnetic field correlated with gravity or topography?

Supplementary data to the article

    Gong, S. and Wieczorek, M. (2020) Is the lunar magnetic field correlated
    with gravity or topography? Journal of Geophysical Research: Planets.

This archive contains the Bouguer gravity model used in the analyses of the
above cited manuscript, as well as the data files to reproduce Figures 2-3 and
Figures S1-S3. For the correlation results, the bandwidth and angular radius of
the window were 26 and 10 degrees, respectively, which yields a concentration
factor that is better than 99%.

FILE DESCRIPTIONS

34_12_3220_900_80_misfit.sh

    This file contains the spherical harmonic coefficients of the Bouguer
    gravity model up to degree and order 900. The two values in the first
    row correspond to the reference radius of the model in km and the
    constant GM in km^3/s^-2. To generate this model, all known gravitational
    contributions from the crust were removed from the free-air gravity,
    including surface relief, lateral variations in crustal density, and
    crustal thickness variations. The crustal thickness model is from
    Wieczorek et al. (2013), which has an average thickness of 34 km, a
    constant crustal porosity of 12%, and a mantle density of 3200 kg/m^3.

mc_total_10_26_1_surface.dat

    Data used to generate the lower panel of Figure 2. This file contains the
    95% confidence limits of the average correlation from the Monte Carlo
    simulations which were performed every 30 degrees in both longitude and
    latitude. The first two columns correspond to the latitude and longitude,
    and the third to fifth columns correspond to the 95% confidence limits by
    using topography, total free-air gravity, and total Bouger gravity,
    respectively.

spec_10_26_1_surface.dat

    Data used to generate Figure 3. Correlation results between total magnetic
    field and topography, total free-air gravity, and total Bouguer gravity at
    the surface. The first two columns correspond to the latitude and longitude,
    and the third to fifth columns correspond to the ratio between the average
    correlation and its 95% confidence limits by using topography, total
    free-air gravity, and total Bouger gravity, respectively. If the value is
    equal to or greater than 1, this indicates that the total magnetic field is
    positively correlated with the testing field (topography, total free-air
    gravity, or total Bouguer gravity); If the value is equal to or less than
    -1, this indicates that the total magnetic field is negatively correlated
    with the testing field.

spec_10_26_1_surface_4lwin.dat

    Data used to generate Figure S1. Correlation results calculated at the
    surface by removing the first 4*lwin degrees.

spec_10_26_1_30km.dat

    Data used to generate Figure S2. Correlation results calculated at 30 km
    altitude.

spec_10_26_1_surface_3sigma.dat

    Data used to generate Figure S3. Correlation results calculated at the
    surface by using the 99% confidence limits.