When did satellite records begin tracking the Arctic Ocean?
Satellite records began tracking the Arctic Ocean in 1978. By 2013, ice that was at least four years old accounted for only seven percent of all Arctic sea ice.
Questions about Arctic sea ice decline
Short answers, pulled from the story.
How much ice did Earth lose from the Arctic region between 1994 and 2017?
Earth lost 7.6 trillion tonnes of ice from the Arctic region between 1994 and 2017. That loss represents fifty-seven percent more than the rate seen in the 1990s.
What year will Arctic sea ice area likely drop below one million square kilometers according to the IPCC Sixth Assessment Report?
The IPCC Sixth Assessment Report released in 2021 stated Arctic sea ice area will likely drop below one million square kilometers before 2050. A 2006 paper predicted near ice-free September conditions by 2040 using the Community Climate System Model.
Which part of the Arctic region is warming the fastest and what are its effects on Eurasian weather?
Barents Sea is the fastest-warming part of the Arctic region. Autumn BKS ice loss results in cooler Eurasian winters while winter ice loss makes them warmer.
Why do polar bears have reduced body size and reproduction rates due to melting sea ice?
Polar bears turn to alternative food sources because Arctic sea ice melts earlier each year. The diet becomes less nutritional, leading to reduced body size and reproduction rates.