Global Storm
by Claude Opus 5.5
When the people of the Earth imagined Mars, as they did for a century and more before anybody went there, they imagined it as a place of drama: of canals and ancient cities, of invaders and empires, of red deserts crossed by heroes. The most famous of these imaginings, written in a house in Woking in the 1890s, had the Martians coming to us, driven from their own dying world by its cold and its thinning air, and it is one of the small ironies of history that the first people actually to live on Mars found its chief difficulties to be very much what that author had attributed to its fictional inhabitants. Mars is cold. Its air is thin. And its sunlight, on which almost everything depends, can be taken away for months at a time by a storm of dust.
I want to tell the story of the great storm of the second year at Tharsis Station, and of the woman who kept the lights on, because it seems to me that the history of the settlement of Mars, when it comes to be written properly, will be a history of such people, and of such decisions, rather than of the landings and launches that the newspapers prefer.
*
Grace Odhiambo was the station's power systems lead. She was forty-four, born in Kisumu on the shore of Lake Victoria, and she had spent the first part of her career working on the geothermal plants of the Rift Valley at Olkaria, where the Earth's heat is drawn up from boreholes two kilometres deep and turned into a large part of Kenya's electricity. She knew a good deal about making power in difficult places, and more about rationing it, since a geothermal field, like any other power source in a developing grid, is always being asked for more than it can give. She had come to Mars, she liked to say, because it seemed to be the one place left with a worse power problem than Kenya.
The station, in its second year, housed eight people in six connected modules on a flat stretch of plain at the foot of one of the great Tharsis volcanoes. Its power came from two sources. The first was a fission reactor, a compact unit about the size of a domestic refrigerator, buried in a shallow pit four hundred metres from the habitat to keep its radiation away from the crew, which produced forty kilowatts of electricity continuously, day and night, whatever the weather. The second was a field of solar panels, spread over a hectare of ground east of the habitat, which in clear conditions produced about sixty kilowatts at midday and nothing at night, and which charged a bank of batteries to carry the station through the dark. Between them, the two sources gave the station a comfortable margin. The reactor alone could keep everyone alive. The solar field made life pleasant.
In the forty-third week of the second year, the reactor was shut down for its first scheduled maintenance.
*
It is worth explaining why a reactor should need maintenance at all, since the public, encouraged by the agencies, had come to think of them as sealed boxes that simply ran.
The reactor's core was, in fact, sealed, and needed nothing. But its power was controlled by a set of drums arranged around the core, each one coated on one side with a material that absorbed neutrons, which turned slowly on electric actuators to regulate the reaction. If the drums turned to present their absorbing faces to the core, the reaction slowed and stopped. If they turned the other way, it ran. The actuators were the reactor's only moving parts, and moving parts wear out. One of them had begun, in the thirty-eighth week, to draw more current than it should, and to respond more slowly to its commands. The fault was not dangerous; the reactor's design ensured that any failure of the drums would shut it down rather than run it away. But it was a fault, and the rules required that it be investigated and repaired, and the investigation required the reactor to be shut down, cooled for several days, and opened by the station's two engineers, working in suits behind a shadow shield, with tools designed for the purpose and a procedure that had been rehearsed on Earth but never performed on Mars.
The engineers estimated three weeks. The station could run on solar power and batteries alone for three weeks without difficulty, provided the weather held. The forecasters on Earth, who watched the Martian atmosphere through a small fleet of orbiting satellites, said that the weather would hold.
The weather did not hold.
*
Martian dust storms are among the strangest phenomena in the solar system. They begin small, as a local lifting of dust by the wind in some region of the planet, usually in the southern hemisphere during its summer, when Mars is closest to the Sun and the surface is warmest. Most of them stay small, or die. But some of them grow, because the dust they lift absorbs sunlight and warms the air, and the warmed air rises and draws in more wind from around it, and the wind lifts more dust, in a feedback that can, in the right conditions, spread across the planet in a matter of weeks until the whole of Mars is wrapped in a haze so thick that from the surface the Sun is a faint smudge, hardly brighter than the Moon seen from the Earth. These global storms come every few Martian years. The last one, before the station was built, had come in 2018, and had killed a robotic rover that had been working on the surface for fourteen years, its solar panels starved of light until its batteries died.
This one began in the forty-fourth week, in a basin far to the south. By the forty-sixth it had crossed the equator. By the forty-seventh it was at Tharsis.
The reactor was in pieces.
*
Grace watched the solar output fall over the course of four days. Sixty kilowatts at midday, then forty, then twenty-five, then eleven. On the fifth day, at noon, the panels produced a little over five kilowatts. The sky outside the habitat's small windows was the colour of weak tea, and then of mud, and the Sun, when it could be seen at all, was a pale disc that could be looked at directly without discomfort. The forecasters said that the storm would last at least six weeks, perhaps more. They said that the dust would take months to settle afterwards, and that the solar panels, coated by its fall, would need cleaning before they returned to anything like full output.
The station's essential loads, the things without which eight people would die, required about nineteen kilowatts. Life support: oxygen generation, carbon dioxide removal, water recovery, air circulation. Heating, at the minimum level to keep the inhabited modules above freezing. Communications. The medical bay's refrigeration. Nineteen kilowatts, day and night. The batteries, fully charged, could provide that for about thirty hours. The panels, at five kilowatts at noon and nothing at night, could not provide it at all.
The engineers at the reactor said that they could have it back in nine days, if they worked without rest, perhaps seven if they cut corners. Grace did not want them to cut corners.
So: nine days. Thirty hours of batteries. Five kilowatts at noon. And everything above nineteen kilowatts, everything that made the station a place of work and not merely a place of survival, would have to go dark.
*
I should say something about the station's loads, because it was the loads, and not the storm, that made the decision hard.
A settlement on Mars is not a camp. By its second year, Tharsis Station had become a place where eight people were doing several kinds of work at once, each of it the culmination of years of preparation, and each of it requiring power. In the greenhouse module, under banks of red and blue lights, a botanist from Wageningen named Pieter de Graaf was running a trial of wheat and potatoes grown in Martian soil, treated to remove its perchlorates, which was in its fourteenth month and which, if completed, would be the first demonstration that a crop could be raised through its full cycle on Mars from local materials. The trial needed eleven kilowatts for its lights and its heating and its pumps. In the laboratory module, a geochemist from Tokyo named Hiroshi Kato was running a set of experiments on samples from the volcano's flanks that required furnaces and a mass spectrometer and, for one series, a freezer at minus eighty degrees, holding samples that would be destroyed if they warmed. In the outer module, used for storage and as a workshop, there were instruments that monitored the weather and the seismic activity of the planet, and a small telescope that a pair of astronomers on Earth were using to observe Jupiter. Each of these had a constituency, among the crew and on the Earth, and each had been promised power when the station was planned.
None of them was essential. All of them were somebody's life's work.
*
Grace called the crew together in the galley on the evening of the fifth day, with the sky outside the windows the colour of a bruise, and set it out.
She said that the station could survive nine days on batteries and the remaining solar output, provided that its load was cut to the essentials and a little more, about twenty-two kilowatts in all, averaged over the day. She said that this would mean shutting down, or reducing to a minimum, everything that was not life support. She said that she had drawn up a plan and wished to discuss it, but that the plan would have to be implemented the next morning, because every hour of delay drained the batteries further.
Her plan was this. The greenhouse lights would be turned off. The plants would be kept alive, just, by maintaining the greenhouse module's temperature at a few degrees above freezing and its air circulation at a minimum, but they would not grow, and the trial would end; whatever the plants did in the next nine days would not be the full-cycle growth that the trial was designed to demonstrate. Hiroshi's furnaces and spectrometer would be shut down. His freezer would be kept running, because its samples were irreplaceable and because it drew only three hundred watts. The outer module's heating would be turned off entirely; its instruments would be powered down; its contents would be allowed to cool to the ambient temperature of the Martian night, about minus seventy. The telescope would be stopped. The weather station and the seismometer, which drew very little, would be kept running on a reduced schedule. The crew would consolidate into the three central modules and sleep there.
*
Pieter de Graaf took it badly. This was not surprising, and Grace did not hold it against him. He was a large, gentle man who had spent the voyage out talking about his potatoes with an enthusiasm that some of the crew found tiresome and Grace found rather touching. He said that the trial was in its fourteenth month of an eighteen-month cycle and that ending it now would waste fourteen months of work that could not be repeated for at least another two years. He said that the trial was the most important experiment on the station, since it bore directly on whether a settlement on Mars could ever feed itself. He asked whether the greenhouse lights could be run at a fraction of their power, enough to keep the plants in a slow growth phase, and Grace said that she had calculated it, and that the fraction which would sustain meaningful growth was about four kilowatts, and that she did not have four kilowatts.
He asked whether Hiroshi's freezer was more important than his plants. Grace said that it was not more important, but that it was cheaper, and that she could afford to keep one of them and not the other. Hiroshi, to his credit, offered to let his freezer go. Grace said no. The freezer's samples could not be collected again; the plants could be grown again. That was the rule she had used throughout: protect what could not be replaced, and let go of what could.
Pieter said that it was a bad rule, because it always favoured the past over the future. Grace said that he might be right, and that she did not have time for a better one.
*
There is a lesson in this which I think the settlers of Mars learned more quickly than the people of the Earth, and which the people of the Earth might do well to learn from them.
We are used to thinking of scarcity as a temporary condition, a problem to be solved by growth. On the Earth, for most of the last two centuries, it has been: when there was not enough of something, we made more, or found more, or moved to where there was more. On Mars there is no more. There is the power the station can make, and the power it needs, and the difference between them, and in a storm the difference is negative. The settlers learned, as people in sieges and wars and famines have always learned, that the central question of life under scarcity is not how to get more but how to divide what there is; and that every division is a moral act, because it decides whose work continues and whose ends. A power budget on Mars is not an engineering document. It is a constitution.
Grace understood this. She had learned it at Olkaria, where the managers of the grid would telephone on dry evenings to ask her to push the turbines harder, and she would refuse, because she knew what the boreholes could bear, and somewhere in Nairobi a district would go dark for an hour so that the field would still be producing in ten years. She did not think of herself as a moralist. She thought of herself as someone who knew what the machines could bear.
*
The plan was implemented the next morning. The greenhouse lights went out. Hiroshi shut down his furnaces. The outer module's heaters were turned off, and over the following day its temperature fell through zero and minus twenty and minus fifty, and frost formed on the inside of its single window. The crew moved into the three central modules, eight people in a space designed for four, and slept in shifts in the galley and the laboratory, and were, for the most part, patient with each other.
The batteries held. The panels gave their five kilowatts at noon, and then four, as the dust settled on them, and Grace sent a crew member out in a suit each morning with a soft brush to clear the worst of it, which helped a little. She watched the battery charge every hour of every day. At night it fell; by day it rose, a little, never quite as much as it had fallen. She kept a chart of it, on paper, on the galley wall, because she found that the others found it reassuring to see the line, and because she did not trust the screens entirely.
On the sixth day the reactor engineers reported a setback: the replacement actuator had been fitted, but its position sensor was giving inconsistent readings, and they would need to investigate. Another two days. They asked whether they should restart the reactor with the sensor as it was, relying on the other drums for control, and accept the risk that the reactor's protection system would detect the inconsistency and shut it down again. Grace said no. A restart followed by a shutdown would cost a further cooling period of several days, and would leave the station worse off than waiting. She asked them to fix the sensor properly.
*
The reactor came back on the eleventh day of the storm, at four in the morning. Grace was awake, in the galley, watching the reactor's telemetry on a tablet, and she saw the neutron flux rise as the drums turned, and the temperature of the core climb, and the converters begin to produce power, a kilowatt, five, twenty, forty. She watched it hold at forty for an hour. Then she went to the panel on the galley wall and, one by one, began to bring the station's loads back up.
The batteries had reached, at their lowest point, nineteen per cent of their capacity. Her plan had allowed for a minimum of fifteen.
*
The storm lasted seventy-one days in all. For the sixty days after the reactor's return, the station ran on its forty kilowatts and whatever the dusty panels could add, which was not much, and Grace managed the budget daily, as a quartermaster manages rations. Hiroshi's laboratory came back on, with its furnaces running at reduced schedule. The outer module was warmed again, slowly, so that its instruments would not crack from thermal shock, and three of them were found to be damaged anyway, and were repaired or written off. The telescope resumed.
The greenhouse came back last, because its lights were the largest single load, and because Grace could give it only part of what it needed until the storm cleared. Pieter's plants had survived. They were pale and stunted and had lost most of their leaves, and the wheat had stopped growing at a stage that made a full harvest impossible. The potatoes, astonishingly, had kept forming tubers in the dark, slowly, on the reserves stored in their stems, and when the lights came back they resumed. Pieter harvested them in the seventy-ninth week: two point three kilograms of small, knobbly, slightly greenish potatoes, grown in Martian soil, through a Martian winter that had become a Martian night.
It was not the trial he had designed. It was, he wrote in his report, something better: a demonstration that a staple crop could survive, in Martian soil, a prolonged loss of light of the kind that any future settlement would face. He was generous enough to acknowledge, in a footnote, that this demonstration had been made possible by the station's power systems lead, who had cut his lights.
*
I have said that the history of the settlement of Mars will be a history of people like Grace Odhiambo, and I should end by saying why I think so.
The history of exploration, as it has generally been written, is a history of arrivals: of the first to cross an ocean, the first to reach a pole, the first to stand on the Moon. But arrival is not settlement. Settlement is what happens afterwards, in the long years when the explorers have gone home and the people who remain must make a life in a place that does not want them. It is a history of rationing and repair, of maintenance schedules and power budgets, of the endless quiet decisions about what to keep and what to let go. It is not dramatic. It is the opposite of dramatic. Its triumphs are the disasters that do not happen, and its heroes are the people who know, to the kilowatt, what the machines can bear.
The author in Woking, a century and a half ago, imagined Martians who had learned to live on a dying world by becoming cold and calculating and ruthless. The real Martians, the people of Tharsis Station and the settlements that have followed it, learned to live there by becoming careful, and by being honest with one another about what they could not have. It is a less exciting story. I think it is a better one.
Grace still works at Tharsis. The station now has two reactors, so that one can be maintained while the other runs, a lesson learned in the second year and applied in the third. She keeps, on the wall of the power control room, the paper chart of the battery charge from the eleven days before the reactor came back, a jagged line descending across the page and stopping, at its lowest point, at nineteen per cent. Visitors sometimes ask what it is. She tells them it is the station's most important document. They generally assume she is joking.