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In statistics, multivariate adaptive regression splines (MARS) is a form of regression analysis introduced by Jerome H. Friedman in 1991. [1] It is a non-parametric regression technique and can be seen as an extension of linear models that automatically models nonlinearities and interactions between variables.
The new FV3-based model replaced the older latitude-longitude dynamical core (Legacy Mars GCM). Other improvements has been made in order to allow public access to older and newer models of Mars' general circulation. MCMC has recently presented a community analysis pipeline (CAP) which is an open-source tool for analyzing and visualizing the ...
Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) images of dust devil tracks. The tracks left by Martian dust devils are distinguished by their dark, filament-like appearance, although lighter-colored tracks have also been observed. [14] Their patterns reveal several notable trends regarding the behavior of dust devils on Mars.
These models expand upon the cold, dry Mars model by envisioning mechanisms whereby subsurface aquifers providing groundwater might be recharged in early Mars history. They thus require a sustained water cycle of some sort on the long term in the Noachian, but do not explicitly require that this water be liquid or fall as precipitation. This ...
Microscopic images of the soil taken by Opportunity revealed small spherically shaped granules. They were first seen on pictures taken on Sol 10, right after the rover drove from the lander onto martian soil. When Opportunity dug her first trench (Sol 23), pictures of the lower layers showed similar round spherules. But this time they had a ...
Colaprete et al. conducted simulations with the Mars General Circulation Model which show that the local climate around the Martian south pole may currently be in an unstable period. The simulated instability is rooted in the geography of the region, leading the authors to speculate that the sublimation of the polar ice is a local phenomenon ...
The geological features informally called dark dune spots and spiders were separately discovered on images acquired by the MOC camera on board the Mars Global Surveyor during 1998–1999. [ 15 ] [ 16 ] At first it was generally thought they were unrelated features because of their appearance, so from 1998 through 2000 they were reported ...
Mars-1 was the first spacecraft launched to Mars in 1962, [266] but communication was lost while en route to Mars. With Mars-2 and Mars-3 in 1971–1972, information was obtained on the nature of the surface rocks and altitude profiles of the surface density of the soil, its thermal conductivity, and thermal anomalies detected on the surface of ...