November 8, 2018 – Tim Lenton of University of Exeter presents “Tipping Points in Climate and Biosphere Function”. Lenton is co-author of the most discussed climate study from 2018, Trajectories of the Earth System in the Anthropocene https://www.pnas.org/content/115/33/8252 Tipping Points in Climate & Biosphere Functions Lenton is co-author of the most discussed climate study from…
We report the discovery of a large impact crater beneath Hiawatha Glacier in northwest Greenland. From airborne radar surveys, we identify a 31-kilometer-wide, circular bedrock depression beneath up to a kilometer of ice http://advances.sciencemag.org/content/4/11/eaar8173 Hiawatha Glacier https://en.wikipedia.org/wiki/Hiawatha_Glacier Sources Discovering a massive meteorite crater https://www.youtube.com/watch?v=hQ9maLsIcts Massive crater under Greenland’s ice points to climate-altering impact in the…
Climate unknowns include the rate of sea level rise, ozone loss, how the Gulf Stream will react and what it possibly means, the Earth’s response, and the potential for extra methane release from methane clathrates, stored at continental margins. There are many more climate unknowns, for example elaborated in this article https://thinkprogress.org/what-are-the-unknown-unknowns-of-global-warming-1438d934bdee 0:04 #1 Ozone…
Glacier half the size of Manhattan breaks off Greenland https://www.cbc.ca/news/technology/greenland-glacier-calving-1.4742691 POLAR 2018 https://www.facebook.com/1667646543476558/videos/2059095260998349 The land ice contribution to sea level during the satellite era http://iopscience.iop.org/article/10.1088/1748-9326/aac2f0/meta ICE ALIVE https://www.youtube.com/watch?v=okafyLzGvcw Greenland Documentary https://www.youtube.com/watch?v=IfjoI-jliSk Drastic Arctic warm event stuns scientists, as record-breaking temperatures reach the North Pole https://mashable.com/2018/02/26/arctic-heat-wave-north-pole-february-sea-ice Zack Labe https://twitter.com/ZLabe Ocean‐induced melt triggers glacier retreat in Northwest…
Collapse of the Atlantic Ocean heat transport might lead to hot European summers https://www.su.se/english/collapse-of-the-atlantic-ocean-heat-transport-might-lead-to-hot-european-summers-1.383247 Related Warm summers during the Younger Dryas cold reversal https://www.nature.com/articles/s41467-018-04071-5
Observed fingerprint of a weakening Atlantic Ocean overturning circulation https://www.nature.com/articles/s41586-018-0006-5 The oceans’ circulation hasn’t been this sluggish in 1,000 years. That’s bad news. https://www.washingtonpost.com/news/energy-environment/wp/2018/04/11/the-oceans-circulation-hasnt-been-this-sluggish-in-1000-years-thats-bad-news Gulf Stream current at its weakest in 1,600 years, studies show https://www.theguardian.com/environment/2018/apr/11/critical-gulf-stream-current-weakest-for-1600-years-research-finds Shutdown of thermohaline circulation https://en.wikipedia.org/wiki/Shutdown_of_thermohaline_circulation Stronger evidence for a weaker Atlantic overturning circulation http://www.realclimate.org/index.php/archives/2018/04/stronger-evidence-for-a-weaker-atlantic-overturning-circulation North Atlantic ocean currents are…
Past studies of Antarctica’s accelerated glacier retreat focused on regional trends, a new study now finds continental trends of over ten percent of marine terminating glaciers moving inland. Current peak retreat has been documented to be in the ballpark of 25 meters each single year. Read Chris Mooney’s Washington Post article study summary goo.gl/HuxtxL /…
Scientist speculated that pingos may erupt and lead to the creation of craters – small lakes, thaw ponds. New satellite observations reveal continuous trend. The Siberian Times article, Pingo in Arctic goo.gl/mwNnEF / http://siberiantimes.com/other/others/news/crater-formed-by-exploding-pingo-in-arctic-erupts-a-second-time-from-methane-emissions/ The trend from frozen tundra soils shifting to thermokarst erosion and thaw ponds, may in the future be exacerbated by increased…
In this panel, Vladimir Romanovsky (University of Alaska Fairbanks), talks about thawing permafrost. Anders Levermann (PIK) 12:30 ,talks about Greenland’s contribution to sea level rise, David Titley (Ret. U.S. Navy Admiral, now Pennsylvania State University) 23:38 , talks about security, with a subsequent panel discussion 33:34 . Video via Earth Institute https://www.youtube.com/watch?v=GFe3GOCBZO8