By Kenneth Richard on 23. September 2021
Share this…FacebookTwitterScientists continue to find regions of the world where modern “global” warming has not occurred. Sea surface temperatures (SSTs) in the South Atlantic (south of South Africa) and Southern Ocean (New Zealand) are colder today than they have been at any time in the last 12,500 years (Shuttleworth et al., 2021). SSTs were multiple […]
Posted in Arctic, Paleo-climatology |
By Kenneth Richard on 16. September 2021
Share this…FacebookTwitter The Canadian Arctic’s surface temperatures have been up to 15 to 25°C warmer than today during the geologically recent Holocene, Pleistocene, and Pliocene epochs. Scientists (Campbell-Heaton et al., 2021) assessing the ratio of winter temperature at the ground surface to that in the air (the “freezing n-factor”) suggest ground surface winter temperatures now […]
Posted in Arctic, Paleo-climatology |
By P Gosselin on 12. September 2021
Share this…FacebookTwitterNorwegian data show September minimum Arctic sea ice has risen over the past 10 years, contradicting earlier predictions of a death spiral By Kirye and Pierre Friday NTZ posted on Arctic sea ice extent. This year Arctic sea ice has just about reached its minimum. and so we plot the new data (see below). […]
Posted in Arctic, Stupid Predictions |
By P Gosselin on 10. September 2021
Share this…FacebookTwitterThis year’s Arctic sea ice minimum reaches third highest level in a decade, latest data show. Die kalte Sonne here presents its latest climate video. The first part looks at this year’s Arctic sea ice melt season. Now that it’s September, sea ice extent has just about reached its minimum for the year and […]
Posted in Arctic |
By Kenneth Richard on 9. September 2021
Share this…FacebookTwitterIn a “major revision” to the “long-standing view,” scientists are increasingly concluding the last glacial had summers “several degrees” warmer than today, with climate conditions warm enough to allow year-round grass grazing by horses, antelope, gazelle…in Siberia, Alaska, and north of the Arctic circle. Multiple degrees warmer glacial temperatures pervaded both hemispheres. The “long-standing […]
Posted in Arctic, Paleo-climatology |
By Kenneth Richard on 19. August 2021
Share this…FacebookTwitterExposed moss and willow shrubs buried beneath today’s receding East Greenland glaciers can be dated to 400 to 500 years ago, suggesting this period (the early Little Ice Age) was as-warm or warmer than today. It is widely accepted that Greenland’s surface temperatures were several degrees warmer (McFarlin et al., 2018, Axford et al., […]
Posted in Arctic, Glaciers, Paleo-climatology |
By Kenneth Richard on 1. July 2021
Share this…FacebookTwitterA new study reports that during Pleistocene cold stages, when CO2 concentrations dipped below 200 ppm, Arctic Siberia had much more fertile soil and productive vegetation than exists today. Extensive grassland ecosystems could sustain year-round grazers: horses, mammoths, bison. Today this region’s large herbivores must be fed by humans to secure survival due to […]
Posted in Arctic, Paleo-climatology |
By Kenneth Richard on 21. June 2021
Share this…FacebookTwitterSea ice has been declining in the Canadian North Atlantic since the 1970s, and yet the harp seal population has been estimated to have risen from a little over 1 million in 1971 to about 7.5 million in 2012 to 2019. But model projections suggest the seal populations will decrease in the future due […]
Posted in Arctic, Sea Ice |
By Kenneth Richard on 20. May 2021
Share this…FacebookTwitterA new study asserts that when Greenland naturally warms by multiple degrees per decade, this “abrupt climate variability can result entirely from unforced or noise-induced oscillations of the coupled atmosphere-ice-ocean system.” This means the recent modest climate changes for Greenland may easily fall within the scope of an unforced natural variability pattern. In the […]
Posted in Arctic, Natural Variability |
By Kenneth Richard on 13. May 2021
Share this…FacebookTwitterFossilized evidence of temperate rainforests only hundreds of kilometers from Antarctica’s South Pole (82°S) has been uncovered. It suggests the warmest mean month was 18.5°C about 90 million years ago. Today the warmest mean month for this location is about -20°C. Image Source: EarthSky (press release for Klages et al., 2020) Despite rapidly rising […]
Posted in Antarctic, Arctic, CO2 and GHG, Paleo-climatology |
By Kenneth Richard on 3. May 2021
Share this…FacebookTwitterA new study (Kullman, 2021) suggests ~9000-year-old tree remains can be found buried in “currently empty snow hollows and glacier cirques” at elevations 600-700 m higher than where trees can grow today, implying a >3°C warmer Early Holocene climate. Treelines were still 75-100 m higher during the Medieval Warm Period…and even during the 15th […]
Posted in Arctic, Medieval Warm Period, Paleo-climatology |
By P Gosselin on 14. April 2021
Share this…FacebookTwitterThough it has dropped since its peak in 1979, Arctic sea ice extent in March has remained stable since 2005. There are two months that are of particular interest in the Arctic: September, when sea ice reaches its minimum, and March, when it reaches its maximum. Gains 504,000 sq km. Today we look at […]
Posted in Antarctic, Arctic, Sea Ice |
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