Se Nasas visualisering av hur isen försvinner i Arktis! Hela 95 % av den gamla isen har försvunnit på 35 år!
Det förändrar naturligtvis förutsättningarna för både människor och djur, t o m plankton påverkas, kusterna eroderas.
NASA visualization shows devastating decline in Arctic ice over past 35 years
New sheets of sea ice spread and melt with the seasons, but the Arctic Circle has always been covered with a percentage of older ice, or perennial ice, which survives seasonal changes. This is why in the dead of summer there is still ice at the top of the world.
According to the new data, accumulated by the NSIDC and visualized by NASA, in the first week of January in 1984, the area in the Arctic Ocean covered by sea ice older than four years was over 3.1 million square kilometres.
By contrast, in the first week of January in 2019, NASA found that the area covered by the older sea ice had plunged down to only 116,000 square kilometres.
This means that perennial ice in the Arctic Circle has shrunk by more than 95 per cent in only 35 years.
…
The ramifications of this could be massive, Serreze said, from environmental effects to cultural ones, threatening the safety and livelihoods of entire communities.
“The people who live (in northern communities) are being affected because their Indigenous hunting practices are being affected,” Serreze said. “They can't get out onto the ice. Same with the polar bears and the walrus can't get out on the ice.”
He added that coastal erosion is becoming more and more of a problem in parts of the Arctic, explaining that some “coastal areas are basically sediments that are glued together by permafrost.” Not only is the permafrost being affected by global temperatures increasing in the air and the water, but the loss of sea ice cover is exposing these areas to harsher waves and physical punishment from the ocean.
“You're seeing areas along the coast of Alaska that are receding 15 to 25 feet a year,” Serreze said. “Because of the loss of the sea ice cover.”
The continued loss of sea ice will have effects on everything “from plankton all the way through the top predators,” according to Serreze.
https://www.ctvnews.ca/sci-tech/nasa-visualization-shows-devastating-decline-in-arctic-ice-over-past-35-years-1.4582365
Det förändrar naturligtvis förutsättningarna för både människor och djur, t o m plankton påverkas, kusterna eroderas.
NASA visualization shows devastating decline in Arctic ice over past 35 years
New sheets of sea ice spread and melt with the seasons, but the Arctic Circle has always been covered with a percentage of older ice, or perennial ice, which survives seasonal changes. This is why in the dead of summer there is still ice at the top of the world.
According to the new data, accumulated by the NSIDC and visualized by NASA, in the first week of January in 1984, the area in the Arctic Ocean covered by sea ice older than four years was over 3.1 million square kilometres.
By contrast, in the first week of January in 2019, NASA found that the area covered by the older sea ice had plunged down to only 116,000 square kilometres.
This means that perennial ice in the Arctic Circle has shrunk by more than 95 per cent in only 35 years.
…
The ramifications of this could be massive, Serreze said, from environmental effects to cultural ones, threatening the safety and livelihoods of entire communities.
“The people who live (in northern communities) are being affected because their Indigenous hunting practices are being affected,” Serreze said. “They can't get out onto the ice. Same with the polar bears and the walrus can't get out on the ice.”
He added that coastal erosion is becoming more and more of a problem in parts of the Arctic, explaining that some “coastal areas are basically sediments that are glued together by permafrost.” Not only is the permafrost being affected by global temperatures increasing in the air and the water, but the loss of sea ice cover is exposing these areas to harsher waves and physical punishment from the ocean.
“You're seeing areas along the coast of Alaska that are receding 15 to 25 feet a year,” Serreze said. “Because of the loss of the sea ice cover.”
The continued loss of sea ice will have effects on everything “from plankton all the way through the top predators,” according to Serreze.
https://www.ctvnews.ca/sci-tech/nasa-visualization-shows-devastating-decline-in-arctic-ice-over-past-35-years-1.4582365

