The Water That Remembers

The dock smelled like salt and diesel and old rope. Maya sat on a crate watching a woman in a yellow slicker load orange floats into a truck, one after another, cursing softly at the tangle of them.

"What are those," Maya asked.

"Drifters," the woman said, not looking up. "We drop them in the current. They radio back where they go. I lost funding for the deep ones, so I'm packing it in." She held one up. It was the size of a beach ball with a long thin tail. "This one washed back after four years. Went south and vanished off the map, then came home."

Soren was already turning the drifter over in his hands. "Four years to go where?"

"Nobody knows exactly. That's the problem." She took it back and dropped it in the truck. "Watch the gear. I'm getting coffee." And she walked off up the dock, still muttering.

Soren opened his notebook against his knee and copied the number stenciled on a float. Maya was looking at the water where it slapped the pilings.

"Feel that," she said, crouching. She had her hand flat on the surface.

Soren put his hand next to hers. "Cold."

"Colder than yesterday. And yesterday was hot."

"Air was hot. Water isn't air."

"But it should catch up." Maya frowned at her wet fingers. "Sun's been cooking this bay for a week. Why is the water still cold underneath."

Soren dipped his arm deeper, past the wrist, past the elbow. His face changed. "Okay. Warm on top. Cold below. Like a line."

"Where's the cold from, then."

"Down."

"From down where."

He pulled his arm out, shaking it. "I don't know. It's just there."

Maya stood and walked to the truck and looked at the drifter that had come home. "She said it went south and came back. Four years. That's a long way for a float that doesn't have an engine."

"Something pushed it."

"Something's always pushing it. In a circle." Maya pressed her lips together. "The cold under my hand. And the float going south. I think those are the same thing."

Soren looked up from the notebook. "Why would those be the same thing."

"I don't know yet. Tell me why cold water sinks."

"It's heavier. Cold water's denser than warm. And salt." He tapped the pencil. "Salt makes it heavier too. Aunt Rosa's always complaining the freezer ice is fresh even from seawater, so when seawater freezes the salt gets left behind in the water around it."

"So near the poles." Maya was talking faster now. "Cold. Ice forming. Salt getting left behind. That water is heavy twice."

"So it sinks."

"So it sinks. And it has to go somewhere. It can't just pile up at the bottom of the pole." She turned in a slow circle on the dock, looking for where somewhere might be. "It spreads. Along the bottom. Toward here. Toward warm."

Soren stood up. "And if cold heavy water is sliding along the bottom away from the poles, then warm water on top has to slide the other way. Toward the poles. To replace it."

"A loop." Maya's eyes were huge. "That's the loop the float rode."

"Wait." Soren put a hand out like he was steadying something. "The float came back after four years. But it went down and off the map for most of that. If it followed the cold water along the bottom." He stopped.

"How deep is the bottom."

"Miles. Miles deep, in the middle."

They both looked at the flat gray water, which suddenly did not look flat at all.

"Soren." Maya's voice had gone quiet. "How long. If the water goes all the way down and all the way around, pole to here to the other pole and up again. How long is one whole trip."

Soren did not answer with a number. He looked at the water for a long time. Then he said, "Longer than four years. The float only rode a piece of it."

The woman came back down the dock with a paper cup steaming in the cold. She saw their faces and stopped.

"One trip," Maya said to her. "The whole loop. Top to bottom, pole to pole, back up. How long."

The woman took a sip. "That's the number I can't get funded to measure properly." She smiled without much happiness. "Best estimate. About a thousand years. Give or take."

Neither of them said anything.

"A drop of water that sinks off Greenland this morning," the woman went on, quieter now, like she was surprised to be saying it out loud to two kids, "might not surface again until long after everyone alive today is gone. It carries heat the whole way. That's why my country isn't frozen even though it sits as far north as places that are. The ocean hauls warm water up to us. Slow. Patient. On a clock that doesn't care about us at all."

Maya knelt again and put her hand in the water. The cold layer was still there, under the warm.

"This cold," she said. "On my hand right now."

"Could have gone under in the time of knights," the woman said. "Could be older than that. It's been down there in the dark this whole time, moving, and it just now came up to touch you."

Soren crouched next to Maya. He didn't reach for the notebook. He put his hand in beside hers, into the cold layer, and held it there.

"It's going back down," he said. "Isn't it. This water. It'll warm up here and go north and sink again."

"Round and round," the woman said. "For as long as there's been ocean."

The truck engine turned over. The woman set her coffee on the hood and reached in to lift out the drifter that had come home, the one that went south and vanished and returned. She held it a moment, then walked it back to the edge of the dock, knelt, and lowered it into the water. It bobbed once, turned, and began to slide out toward the mouth of the bay.