Why a Tent on Mars Beats a Full-Blown Planetary Makeover ⚡ экспресс
The assessment of Mars terraforming is based on systemic constraints: required atmospheric reserves, radiation control, industrial energy and rates, and loss resilience. The method of order-of-magnitude estimates was applied to endogenous CO₂, synthetic greenhouse gases, aerosols, orbital mirrors, and regional paraterraforming. It is shown that pressure close to Earth's requires reserves on the order of 10¹⁸ kg (one millibar of pressure on Mars requires 3.89×10¹⁵ kg). Available CO₂ yields no more than tens of millibars and heating of less than 10 K. To achieve temperatures of 250–273 K, an infrared opacity of 2–4 or a solar energy influx of ~100 W/m² is needed, implying mirrors covering 10¹³–10¹⁴ m². Creating a breathable atmosphere is limited by O₂ and N₂ reserves and requires at least 10²⁵ J, which at rates of 10⁷–10⁸ kg/s stretches over centuries with powers of 100 TW–1 PW. The conclusion: regional habitability under domes is industrially achievable, whereas an open atmosphere without colossal import of volatiles and centuries-long industry is unrealistic.
Today's Martian surface is a cold, nearly airless home. Many dream of a full renovation: warming the planet, filling it with air from carbon dioxide and nitrogen. But researchers have crunched the numbers: such a 'makeover' would require space mirrors that capture sunlight and stretch over an area the size of Africa just to melt the polar caps, plus factories pumping out gas for a thousand years. Even just making the air breathable demands energy that humanity produces over centuries. And that's only half the problem: without a magnetic field, Mars would quickly lose its new atmosphere to the solar wind.
Fortunately, instead of rebuilding the whole house, we can pitch a large tent in the best room. Domes over valleys or craters let us create an Earth-like climate in a small area. This approach is already feasible and requires far fewer resources. People could live and work inside, and even explore the planet without a full spacesuit — only needing protective gear when stepping outside.
🎯 Without a magnetic field, any new Martian atmosphere would be stripped away by the solar wind in just a few million years — a blink of an eye on geological time scales.
🎬 Fans of Kim Stanley Robinson's Mars trilogy will recognize this theme — from the first domes to the grand attempts at full terraforming.