1999
DOI: 10.1126/science.286.5437.94
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The Gravity Field of Mars: Results from Mars Global Surveyor

Abstract: Observations of the gravity field of Mars reveal a planet that has responded differently in its northern and southern hemispheres to major impacts and volcanic processes. The rough, elevated southern hemisphere has a relatively featureless gravitational signature indicating a state of near-isostatic compensation, whereas the smooth, low northern plains display a wider range of gravitational anomalies that indicates a thinner but stronger surface layer than in the south. The northern hemisphere shows evidence f… Show more

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Cited by 130 publications
(110 citation statements)
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“…Interestingly, the correlation appears to be distinctly better for the south polar cap (Smith et al 1999b).…”
Section: Results For Present Conditions Andmentioning
confidence: 93%
“…Interestingly, the correlation appears to be distinctly better for the south polar cap (Smith et al 1999b).…”
Section: Results For Present Conditions Andmentioning
confidence: 93%
“…This was interpreted as a mass concentration (mascon) suggesting an uplift of the crust-mantle boundary resulting from a large impact cratering event. Subsequent observations acquired by the radio science experiment on-board MGS, used to produce a global high-resolution gravitational field model [10,12], determined a positive anomaly value of 600 mgal for Isidis Planitia. This is the largest impact-associated gravity anomaly on Mars, surpassed only by the gravity anomalies measured in connection with the major young volcanic provinces (Olympus and Tharsis Montes).…”
Section: Geophysical Research In Isidis Planitiamentioning
confidence: 99%
“…This is the largest impact-associated gravity anomaly on Mars, surpassed only by the gravity anomalies measured in connection with the major young volcanic provinces (Olympus and Tharsis Montes). Isidis Planitia's positive anomaly is surrounded by a broad negative anomaly annulus, possibly produced by a combination of flexural response of the lithosphere to loads or uncompensated crustal thickening caused by the impact [10].…”
Section: Geophysical Research In Isidis Planitiamentioning
confidence: 99%
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“…A digital elevation model (DEM) using 1/128 gridded Mars Orbiter Laser Altimeter (MOLA) (Smith et al, 1999) data was used to extract the drainage divides associated with Parana Valles and its sub-basins as described below. The MOLA DEM has a spatial resolution of $460 m/pixel and a vertical accuracy of $1 m (Fig.…”
Section: Methodsmentioning
confidence: 99%