Rebecca Woodgate had no time for idle chat as her oceanography team scurried on the deck of their research ship during a recent mission in the Bering Strait, a crucial region for studying the impact of global warming.
Ms Woodgate, of the University of Washington's Polar Science Centre, had much to do in a short time, pinpointing undersea locations of eight data-gathering moorings on the US and Russian sides of the strait, electronically coaxing them to the surface and sinking new ones that will be anchored for a year.
It's exacting work that must be done quickly for readings to be useful to her and her colleagues on a joint US-Russian expedition to gauge the impact of climate change on the far north waters between the former Cold War foes.
When an onlooker wandered too close to the action during a deployment in choppy seas off the Siberian coast, the British-born scientist hastily handed him used packaging from a piece of gear and said, "Here - do something with this."
Resembling strings of beach balls, the moorings provide precision measurements of currents, temperature and salt content. Some even record whale sounds for the mission, called RUSALCA, or Russian-American Long-term Census of the Arctic.
RUSALCA, which in Russian folklore is the name of a female water nymph, has uncovered growing evidence of warming and its effects where the Pacific and Arctic oceans meet.
Organised by the US National Oceanic and Atmospheric Administration and Russian Academy of Sciences, it does so while balancing the objectives of two countries with growing interest in securing their resource-rich Arctic territories as open water make them more accessible.
The area is a crucial piece of the climate change puzzle.
"I see the Bering Strait as potentially a trigger for ice melt," Ms Woodgate said, while uploading the moorings' data on the Russian research vessel Professor Khromov.
The need for complete information, from Alaska's coast to Russia's eastern tip, makes bilateral cooperation important. Without it, "You're toast," she said.
Ms Woodgate was among about 50 scientists from the US, Russia and other countries aboard the Khromov for six weeks in August and September, studying water and sea life in the Bering and Chukchi seas and Arctic waters well north of Wrangel Island off Russian's northeast coast.
It's difficult to imagine when cold, gale-force winds and heavy seas buffet the ship in late summer that warmer and fresher water flowing through the strait into the Arctic may be pushing the sea ice edge back.
In 2007, it retreated a record amount, startling scientists. This summer, the ice receded to its third-smallest area in recorded history, according to the US National Snow and Ice Data Centre.
It is a vicious cycle, scientists say. Once the ice shrinks, open water absorbs more of the sun's heat, melting more ice.
"There is no debate that the atmosphere is getting warmer, and perhaps the Arctic the most," said Aleksey Ostrovskiy, one of the mission's Russian coordinators and a former diplomat. "That is why scientists have chosen this area for their research, because it indicates the change very well."
It was tough convincing Russia's defence ministry and other authorities that allowing US scientists and their equipment into the country's waters would not compromise national security, he said. Their movements are monitored closely.
Since the maiden RUSALCA voyage in 2004, researchers have identified species of fish and other organisms such as crabs that had never previously been able to survive this far north.
"It is a very interesting question about what happens out there where the ice has normally been all the time and now is retreating," said Terry Whitledge of the University of Alaska Fairbanks, RUSALCA's science chief and one of oceanography's elder statesmen with nearly 90 cruises under his belt.