MEDA works using basic physics:
Its pressure sensor uses a bending diaphragm whose capacitance changes with atmospheric pressure;
temperature sensors use resistance–temperature relationships;
wind sensors detect cooling of heated wires;
radiation sensors use photodiodes and Stefan–Boltzmann principles; and
humidity sensors use changes in polymer conductivity. The pressure interpretation uses the ideal gas law, hydrostatic balance, and CO₂ phase-change equations.
The sunlight, CO₂ freezing/melting at poles, Mars’s orbital position, dust storms, and local crater shape affect pressure on mars.
Sunlight causes the Martian atmosphere to heat and cool rapidly each day, creating strong thermal tides that raise pressure at night and lower it during the day
Atmospheric Pressure∝Atmospheric Mass
In Winter CO₂ freezes into solid ice → atmospheric mass decreases so pressure drops on Mars. while in summer the CO₂ ice sublimates back into gas and increases atmospheric mass, raising pressure
When mars is closer to the Sun more heating occurs so more CO₂ sublimation happens and higher pressure.
Source: https://arxiv.org/abs/2511.09743
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