Chapter 43: Technical Solutions for Atmospheric Transformation

Mars currently has a very thin atmosphere, primarily composed of carbon dioxide, which cannot provide breathable conditions for humans nor effectively protect against cosmic radiation and extreme temperature variations. The technical solutions for transforming Mars' atmosphere mainly include the following aspects. Releasing greenhouse gases: Utilizing carbon dioxide resources on Mars' surface and underground, by heating polar ice caps or artificially creating greenhouse gases (such as fluorides), to raise Mars' temperature. The temperature increase will cause more carbon dioxide and water vapor to enter the atmosphere, accelerating the greenhouse effect. Building giant mirror reflectors: Installing large-scale solar reflectors in Mars' orbit to direct more sunlight to Mars' surface, thereby increasing Mars' surface energy absorption and promoting ice cap melting and climate warming. Volcanic simulation: Simulating Earth's volcanic activities, by technical means to activate underground magma on Mars, releasing large amounts of gas into the atmosphere to increase its density and temperature. These technologies each have their own advantages and disadvantages, requiring comprehensive evaluation of their scientific feasibility, technical difficulty, and environmental impact, followed by gradual implementation. Oxygen sources Oxygen production on Mars mainly relies on the abundant carbon dioxide resources in Mars' atmosphere. Currently, the potential for oxygen production on Mars has already been demonstrated. Mars In Situ Resource Utilization Experiment for Oxygen (MOXIE): This is an experimental device on NASA's Perseverance rover, which converts carbon dioxide in Mars' atmosphere into oxygen through electrochemical methods. MOXIE has successfully operated on Mars multiple times, producing a total of 122 grams of oxygen, which is equivalent to the oxygen a small dog would need in 10 hours. MOXIE works by using solid oxide electrolysis cell (SOEC) technology, heating and pressurizing Mars' atmosphere, and then separating oxygen molecules through an electrochemical battery. Implementing atmospheric transformation in Hellas Planitia Hellas Planitia is one of the largest and deepest impact basins on Mars, with an area of approximately 2.3 million square kilometers. This area is equivalent to the size of Greenland on Earth, or nearly the size of Argentina's land area. It has a diameter of about 2,300 kilometers and a depth of about 7 kilometers (from Mars' standard topographic datum), or up to about 9 kilometers from the surrounding highlands. Hellas Planitia, as the largest impact basin on Mars, is an ideal location for atmospheric transformation due to its low-lying terrain, abundant underground ice resources, and natural "containment" characteristics. Firstly, the low-lying terrain of Hellas Planitia has a natural "gas trapping" effect, which helps reduce the dispersion of gases released during the transformation process to other areas of Mars' surface. Due to Mars' lower gravity and thin atmosphere, any added gases will naturally accumulate in the lowlands. Therefore, selecting Hellas Planitia as the core area for transformation can effectively maintain atmospheric composition concentration and improve transformation efficiency. This terrain advantage not only reduces resource waste but also lowers the cost of maintaining the transformation environment. Secondly, increasing carbon dioxide (CO2) content is key to raising atmospheric pressure and enhancing the greenhouse effect. The abundant underground ice and carbonate mineral deposits in Hellas Planitia provide sufficient resources for this process. By deploying giant solar reflectors to focus sunlight on the ice layers, heating and releasing CO2, the atmospheric concentration can be rapidly increased. Additionally, using advanced mineral pyrolysis technology to extract buried carbonate minerals can also release large amounts of CO2. These measures will significantly increase local atmospheric pressure, ensuring conditions for liquid water existence. Next is the generation of oxygen (O2). Photosynthetic organisms and water electrolysis are the two main methods. The water resources in Hellas Planitia can be converted to liquid state through heating, supporting the reproduction of cyanobacteria and other photosynthetic organisms. These organisms absorb CO2 and release O2, gradually improving the atmospheric composition. Meanwhile, using water electrolysis equipment to decompose water into oxygen and hydrogen, with oxygen directly released into the atmosphere and hydrogen stored as fuel. This dual strategy both increases oxygen concentration and optimizes resource utilization efficiency. Hellas Planitia's terrain not only helps with gas retention but also creates ideal conditions for enhancing the greenhouse effect. As CO2 and other greenhouse gas concentrations increase, the average temperature within the basin will gradually rise. By further deploying solar reflectors and heating equipment, this process can be accelerated, promoting the liquefaction of water resources and the formation of ecological cycles. Water resource management is the foundation of the entire transformation plan. The underground ice and polar ice caps in Hellas Planitia are the main water sources. Through heating devices, this ice can be converted to liquid water and introduced into an artificial pipe network system to support ecosystems and human activities. At the same time, a closed water circulation system will recycle and purify used water resources to ensure their efficient utilization. Finally, establishing a closed ecological cycle system that organically combines atmospheric transformation and ecological construction. By introducing cold-resistant, low-pressure-tolerant plants and microorganisms, gradually improving Mars' soil, and promoting ecological diversity and self-sustainability. Hellas Planitia's natural containment effect can also effectively control the microclimate, making this area more suitable for biological survival.