The crew was already at the third trap line when Salomé got to the meadow, which annoyed her in the small way that signaled she had read the wrong departure time on the schedule the night before. She had walked up from the cabin in the blue hour, expecting to find Tomás unpacking the scale at the trailhead. Instead the willows were quiet and the trail showed the scuff of four pairs of boots already gone up. She climbed faster.
The light at 9,500 feet at six in the morning was not the light at seven. She had known this since 2014 and still found it surprising. At six the talus held its own shadow; at seven the shadow belonged to the ridge.
She found them at the upper plot, where the colony spilled across two boulder fields she still thought of by the numbers she had learned as an undergrad — Six-Above, Seven-Above, the Saddle. Tomás had the weighing platform set on its tripod, leveled on a flat slab someone had wedged years ago. The new postdoc, whose name was Hadiya, was crouched at trap nineteen with her hand flat on the wire mesh, talking in the low patient voice that animals heard as not-threat.
"You missed Eight," Tomás said, not looking up. "Yearling male. Light. Four-eighty."
"Light how light?"
"Light for him. He was five-twenty in June."
She set her pack down on the slab and pulled out her tablet, which woke up and showed her the morning's running sheet, the four prior weights for that yearling already aligned in a column, and a small annotation in the margin from the archive assistant — consistent with 2034 cohort trajectory at this date, see also 2037, both below 1991–2020 envelope — which she had not asked for and which was correct.
"I see it," she said.
Hadiya looked over. "He went into the trap willingly. Sat down in it. Didn't even rattle."
"They do that when they're saving."
"Saving what?"
"Everything," Tomás said. "Movement. Calories. Indignation."
Hadiya laughed, then didn't, because she was reading the marmot's posture through the mesh and her face changed. Salomé watched her watch. The postdoc had been at Gothic three months and would be back next year — she had that look, the one Salomé recognized from the inside, the one that meant a person was already redesigning their next five summers around a place.
---
They worked through the line. Trap, weigh, scan the chip, record, release. Tomás had the rhythm; he had been on this crew nine seasons. Salomé had ten if you counted the undergrad summer, which she did and he didn't, a long-running argument neither of them was interested in resolving. Hadiya was learning the rhythm and overshooting it slightly, the way new people did, holding the scale steady for two beats longer than necessary, double-checking the chip reader against her notes.
The morning was warm earlier than it should have been. Salomé noticed it the way you notice an off note in a piece of music you have heard your whole life — not as information but as wrongness. By eight she had peeled off her fleece. By nine she was thinking about the snow year again, which was unhelpful because she had been thinking about the snow year since April.
Thirty percent. Again. The third time in five years.
She took out her tablet at the break and opened the archive. The interface had matured into something that mostly stayed out of her way; she typed colony-stratified survival, Six-Above through Saddle, paired with SWE at upper Gothic snotel, 1948 forward, mark each year below 50 percent of mean and the response came back with a colony-by-colony grid that resolved across ninety-one years and asked her, at the bottom, in the small box where it offered itself as collaborator rather than oracle, whether she wanted to also overlay the 1976–1977 paper-notebook reconstruction that the data team had finished transcribing in February. She said yes. The grid redrew.
Tomás came over with his coffee. "What."
"Look."
He looked. He had been a field tech long enough that he read a grid like this faster than most professors. "Huh."
"Six-Above and Seven-Above behave like each other. The Saddle behaves like a different study."
"It does. It has."
"I want to know if it always did. Or if it's only since the seventies."
"You're going to need the early notebooks for that."
"The 1948 to 1962 stuff is in. They finished it last fall." She tapped the side panel. "I can ask it."
She asked it. The response took longer this time — eleven seconds, which her postdoc self from 2018 would have considered miraculous and which now felt like a wait — and came back with a caveat she appreciated: that the early plot boundaries had been reconstructed from sketch maps and journal descriptions and that confidence on Saddle-versus-Seven-Above colony assignment in the 1950s was moderate, not high, and would she like to flag the affected records for human review.
"Yes," she said aloud, and the tablet logged it.
Hadiya had come over too. "Is this the synthesis?"
"This is a piece of it."
"My PI at Davis tried to do something like this in 2029. Couldn't get the demographic records aligned to the snow data without somebody at RMBL hand-walking it for three weeks."
"It was three weeks. I remember."
"Now it's eleven seconds."
"Eleven seconds plus the nine years of someone digitizing the notebooks."
"Right. That."
Tomás was still looking at the grid. "The Saddle was the colony that had the big die-off in 'fifty-four. Carl talked about it. He said his advisor talked about it."
"That's in the notebooks?"
"It's in a notebook. I don't know which one."
She made a note. The tablet folded it into the day's running log without ceremony.
---
They broke for lunch on the slab. Tomás had brought too many sandwiches because he always brought too many sandwiches, and Hadiya ate one gratefully and asked whether anyone had a kid coming up for Labor Day. Tomás's daughter was driving up from Gunnison Friday. Salomé's wife was flying into Montrose Thursday with their seven-year-old, who had spent the last two summers furious at Gothic and was now, for reasons no one understood, in love with it. She would have four days. Salomé was already negotiating with herself about how much of those four days would be spent at the cabin and how much at the meadow.
"The kid wants to see a marmot weighed," she said.
"Bring her up," Tomás said.
"She'll cry if it squeaks."
"They don't squeak that much."
"She'll find one that does."
Hadiya, who had been quiet, said: "My partner's coming out for two weeks in September. He's never been above 8,000 feet."
"Don't take him up Copper Lake the first day."
"I was going to take him up Copper Lake the first day."
"Don't."
---
After lunch Salomé sat with her back against her pack and opened the document she had been not-writing for six weeks. The sabbatical proposal had promised her department a synthesis paper. It had also promised, in a paragraph she had written quickly and was now living with, that she would scope the feasibility of a new long-term plot five kilometers up-drainage, at the small colony above the old mine, where the elevation was three hundred meters higher and the snowpack regime was distinct enough that it would, if maintained for thirty years, eventually give the kind of contrast that her grid this morning had been straining toward.
Thirty years. She would be seventy-three.
She typed: A new plot established in 2040 at the upper colony would not yield analyzable demographic signal until approximately 2060. Then she deleted it. Then she typed it again.
"Tomás."
"Mm."
"If I proposed a new plot at the upper colony, would the crew carry it?"
He thought about it longer than she expected. "Not this crew. The crew in 2055 would."
"That's the answer, isn't it."
"That's an answer."
She looked at Hadiya, who was repacking the scale, who would be back next summer, and the summer after that, and possibly — if the world held together in the shape it was currently holding together in — for thirty more.
She typed: The case for the upper-colony plot is not what it gives us. It is what it gives the people who will be reading our records in 2070, looking back at the years we are inside of now, trying to understand what the basin did when the snow regime broke.
She left the sentence. She would argue with it tomorrow. She would argue with it the rest of the week.
The wind came up the drainage and turned the aspens at the lower edge of the meadow, and Tomás said one more line before we lose the light, and they went back to work.