Mars-Planetary Climate Model Archives

Subsurface ice final depth interpolated map for latitudes 40-55 North, assuming ice was emplaced 630 kyr ago for 1% dust fraction scenario and no lag layer porosity. The red line represents MONS 7.5% Water-Equivalent Hydrogen contour. The white circles and crosses are locations where ice-exposing craters and maybe ice-exposing craters are found, respectively. The black circles are locations where non-ice-exposing craters are found. The numbers next to the circles indicate the assumed crater depths. -- astro-ph.EP

Astrogeology, Atmospheres, Climate, Weather, Desert Worlds, Habitable Zones, Icy Worlds, Mars, Status Report

The Martian Mid-latitude Subsurface Ice Is The Remnant Of A Past Ice Sheet

by Keith CowingFebruary 25, 2026February 25, 2026

On Mars, a relatively pure water ice layer lies beneath several centimeters of dry soil at mid-latitudes. Its widespread presence poleward of 60° latitude was detected by remote neutron spectroscopy […]

Sketch showing processes leading to larger H-loss in the past 20 million years (Myr). -- astro-ph.EP

Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Habitable Zones, Mars, Status Report

Increased Hydrogen Escape From Mars Atmosphere During Periods Of High Obliquity

by Keith CowingMay 23, 2025May 23, 2025

IMAGE Caption: Sketch showing processes leading to larger H-loss in the past 20 million years (Myr). The loss rate is not expected to have been constant with time, and may […]