Climate scientists and activists responded with alarm Thursday to reporting that this is the latest date in recorded history that \u0022the main nursery of Arctic sea ice in Siberia has yet to start freezing,\u0022 another example of the present-day consequences of human-caused global heating.According to the Guardian, \u0022The delayed annual freeze in the Laptev Sea has been caused by freakishly protracted warmth in northern Russia and the intrusion of Atlantic waters, say climate scientists who warn of possible knock-on effects across the polar region.\u0022\u0022The lack of freeze-up so far this fall is unprecedented in the Siberian Arctic region,\u0022 Zachary Labe, a postdoctoral researcher at Colorado State University, told the newspaper, adding that the current conditions are in line with scientists\u0026#039; expectations about the consequences of anthropogenic climate change.\u00222020 is another year that is consistent with a rapidly changing Arctic,\u0022 added Labe, who also shared a series of related graphics on Twitter. \u0022Without a systematic reduction in greenhouse gases, the likelihood of our first \u0026#039;ice-free\u0026#039; summer will continue to increase by the mid-21st century.\u0022Here is a visual of the extensive open water north of Siberia... sea ice struggling to form so far this October[Daily data from 3-km AMSR2 satellite since September 15] pic.twitter.com/h6qsPLepeL— Zack Labe (@ZLabe) October 22, 2020As the Guardian detailed:The Laptev Sea is known as the birthplace of ice, which forms along the coast there in early winter, then drifts westward carrying nutrients across the Arctic, before breaking up in the spring in the Fram Strait between Greenland and Svalbard. If ice forms late in the Laptev, it will be thinner and thus more likely to melt before it reaches the Fram Strait. This could mean fewer nutrients for Arctic plankton, which will then have a reduced capacity to draw down carbon dioxide from the atmosphere.More open sea also means more turbulence in the upper layer of the Arctic ocean, which draws up more warm water from the depths.In a series of tweets about the reporting, climate scientist Peter Kalmus declared, \u0022Goodbye to the delicate sheet of ice at the top of our planet.\u0022\u0026gt;Goodbye to the delicate sheet of ice at the top of our planet. “This has been forecast for a long time, but there has been little substantial response by decision-makers.” \u0022little substantial response\u0022 is being too generous https://t.co/qGuAW6Qt5r— Peter Kalmus the people\u0026#039;s climate scientist (@ClimateHuman) October 22, 2020I am really struck by this plot. pic.twitter.com/afaqIAkJ25— Peter Kalmus the people\u0026#039;s climate scientist (@ClimateHuman) October 22, 2020Kalmus was far from alone in expressing concern and frustration over the conditions in the Arctic and pointing to the new record as just the latest evidence that policymakers must urgently address the climate crisis.\u0022This is a frightening milestone,\u0022 Food \u0026amp; Water Watch tweeted about the lack of ice in the Laptev Sea. \u0022Our leaders must act to curb and mitigate climate change.\u0022The Green Party in the United Kingdom also shared the report and warned that \u0022we\u0026#039;re breaking the wrong records.\u0022The Arctic sea ice\u0026#039;s annual freeze has yet to begin - making it the latest ever.This follows the Siberian heatwave, with temperatures as high as 38C.There\u0026#039;s more open sea in the Arctic than ever.We\u0026#039;re breaking the wrong records.https://t.co/9wvFnmY7gX— The Green Party (@TheGreenParty) October 22, 2020\u0022Time is running out,\u0022 tweeted former congressional candidate Skylar D. Hurwitz, calling on Americans to vote for Democratic presidential candidate Joe Biden. Although the former vice president remains under pressure from progressives to embrace bolder policies, the contrast between his positions and those of President Donald Trump has won him widespread support from climate experts and advocates.Time is running out. We need @JoeBiden over Trump for the simple fact our planet needs #climateaction.Vote 11/3 #PA01 then we\u0026#039;ll ensure anyone saying they \u0022listen to science\u0022 hears #science says 2050, while nice sounding, is too late for 100% renewables.https://t.co/zoxVds4kDN pic.twitter.com/pIslfRiPLn— Skylar D. Hurwitz (@skylar4congress) October 22, 2020The latest climate crisis record comes after Arctic sea ice shrank to the second-lowest documented extent last month, which the National Oceanic and Atmospheric Administration found was the hottest September ever recorded. Global scientists warned earlier this month that 2020 is on track to be the warmest year on record.