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What the Arctic's rapid transition into a 'new climate' looks like

اخبارالعرب 24-كندا:الثلاثاء 15 سبتمبر 2020 04:40 مساءً Lawrence Ruben has lived in the Arctic all his life, and is still learning about the changing region. 

In the 1970s, there was one guarantee when he would head out on the land — the conditions would be predictable and relatively the same as the previous year.

Elders and knowledge holders would predict a pattern of wildlife migration and flight changes, and the number of seals and polar bears.

But in the past two decades, that predictability has diminished.

"Things have drastically changed, you can't as a traditional knowledge holder guarantee that your predictions will play out because the weather system, the weather patterns are constantly changing," said Ruben. 

A director for the Inuvialuit Game Council, Ruben lives in Paulatuk, N.W.T. Through generations on the land, the Inuvialuit have developed intricate knowledge systems about the interrelationship between the land, waters, plants and animals.

Some of the major changes Ruben has seen in recent years include coastal erosion, prevailing winds throughout the year, fluctuating animal numbers, colder summers, and changes in berry and fishing seasons.

Lawrence Ruben, who is a director for the Inuvialuit Game Council, lives in Paulatuk, N.W.T. He says he has seen drastic changes in the past few decades. (David Thurton/CBC)

What does the 'new Arctic' climate look like?

On Monday, a study of Arctic conditions was published saying the Arctic region has started to transition into a new climate regime altogether.

Laura Landrum, a climate scientist and lead author on the paper, said the climate has changed "astonishingly quickly" from what it was just decades ago.

"We have changed the climate so much and so rapidly that it's different ... This [study] sort of quantifies and validates that we're transitioning to a new regime."

The study looked at three areas to show the transition away from a predominantly frozen state: sea ice, temperature, and precipitation (rain versus snow).

Before the end of this century, the study says, a new Arctic will have emerged in all of these categories if we continue producing emissions at a high rate.

By 2100, if emissions continue at a high rate, the Arctic will likely be ice-free for three to four months of the year; fall and winter temperatures for most of the Arctic Ocean will be 16 to 28 degrees warmer; and rainfall will replace snowfall, with an extension of the rainy season by two to four months each year compared to conditions in the 20th century.

New research by scientists at the National Center for Atmospheric Research (NCAR) finds that the Arctic has changed so significantly that year-to-year variability is moving outside the bounds of any past fluctuations. (Simmi Sinha, ©UCAR)

"The results are consistent across all the different models and they suggest that the Arctic climate, from the perspective of sea ice, has already transitioned into a new climate," said Landrum.

This week a large chunk of Greenland's ice cap, estimated to be more than twice the size of Iqaluit, broke off in the far northeast Arctic. Last month the Milne ice shelf, the last intact ice shelf in the Canadian Arctic, collapsed.

In the next 10 to 40 years, if emissions continue at a high rate, we could see a new climate, statistically, for air temperatures in the fall and winter.

The study says these changes will have wide-ranging and enormous consequences that will affect ecosystems, water resource management, food planning and infrastructure. 

The Greenpeace's Arctic Sunrise ship is seen near floating ice at the Arctic Ocean, September 14, 2020. (Natalie Thomas/REUTERS)

Importance of Indigenous knowledge

A study from February found that extremely warm conditions from 2017 to 2019 were a marked change, even from other recent warm years. The study suggests this change of state could alter the Pacific Arctic ecosystem's structure and function.

Henry Huntington, an Arctic researcher based in Alaska, worked on the February study. He said the recent findings from this latest study aren't surprising, and have been seen for years by people who live and work in the North.

He said working with Indigenous communities and using traditional knowledge is crucial to understanding these changes and connections throughout the ecosystem.

Paulatuk is a community of about 300 people in the Northwest Territories on the Arctic Ocean. (Alex Brockman/CBC)

"Indigenous peoples have been living in the Arctic for thousands of years, and of course they understand it better than anyone," said Huntington.

"They have a tremendous ability to see what is changing in ways that others might not recognize."

Ruben says current knowledge holders are finding ways to adapt to the rapidly changing climate, checking in month-to-month on different conditions.

"Climate change has happened, is happening, and … we have to learn how to adapt to it."

New scientific research shows the Arctic is warming so fast it's started to transition from a mostly frozen state into an entirely different climate with significantly less sea ice, warmer temperatures and even a rainy season. 1:43

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