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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 20. September 2021
Share this…FacebookTwitterA new study shows ocean pH (“acidification”) levels naturally vary seasonally and decadally at rates and magnitudes far exceeding those attributed to anthropogenic activity. In recent decades the oceans’ average pH level has fallen to 8.1 according to NOAA. This pH value is said to be about one-tenth of a unit lower than it […]
Posted in Ocean Acidification, 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 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 P Gosselin on 31. August 2021
Share this…FacebookTwitterMadagascar’s current drought is perfectly within normal range. Droughts were even worse in the past, 2000 years of precipitation reconstruction data show… Linking Madagascar drought to climate change “scientifically not correct” Not surprisingly, there been lots of climate doomsday talk about the drought and hunger situation in Madagascar, all coming from the usual suspects. […]
Posted in Drought and Deserts, Paleo-climatology |
By Kenneth Richard on 23. August 2021
Share this…FacebookTwitterA new study suggests British Columbia (Canada) relative sea levels remained 10 meters higher than they are today until they fell to their present levels in the last ~1800 years. Two other new studies suggest sea levels were still 0.8 to 1 meter higher than today during the Medieval Warm Period. After the peak […]
Posted in Paleo-climatology, Sea Levels |
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 P Gosselin on 17. August 2021
Share this…FacebookTwitterA new study by Atwood et al (2021) published in the journal of Paleoceanography and Paleoclimatology found there’s “poor agreement” between precipitation reconstructions and model simulations over the past 2000 years. This means future projections made by current models are unreliable. Die kalte Sonne here reports on a team of scientists who examined 67 […]
Posted in Models, Paleo-climatology |
By Kenneth Richard on 16. August 2021
Share this…FacebookTwitterThe IPCC’s latest report uses a hockey stick-shaped reconstruction of global temperatures that wholly contradicts previous records produced by the same PAGES 2k and Oceans 2k consortiums from 4 years earlier. In 2015, the PAGES 2k Consortium published an updated (“corrected”) 0-2000 AD global reconstruction that showed a large portion of the 1st millennium […]
Posted in Little Ice Age, Medieval Warm Period, Paleo-climatology |
By Kenneth Richard on 5. August 2021
Share this…FacebookTwitterA new study suggests the modern (1994-2004) surface temperatures in the South China Sea are colder now than any time in the last 6000 years. Except for a brief interval ~500 years ago, SSTs have been consistently 2-4°C warmer than today since the middle Holocene in the South China Sea (Zhou et al., 2021). […]
Posted in Cooling/Temperature, Paleo-climatology |
By Kenneth Richard on 29. July 2021
Share this…FacebookTwitterDozens of rapid warming and cooling periods episodically occurred throughout the last glacial. However, they have often been dismissed as local-only events. A 2020 study published in Science robustly affirms steeper-than-today warming periods spanned both hemispheres and 23 of 25 were “globally synchronous.” Geologists have long recognized that Greenland abruptly warmed up by 5 […]
Posted in Natural Variability, Paleo-climatology |
By Kenneth Richard on 8. July 2021
Share this…FacebookTwitterThere has been no net warming in the Rocky Mountains in the last 500 years. The southern Rocky Mountains were as warm or warmer than recent decades during the 1600s and 1700s and they have been cooling since the 1950s (Berkelhammer and Stott, 2012, Heeter et al., 2020). Image Source: Berkelhammer and Stott, 2012 […]
Posted in Cooling/Temperature, Medieval Warm Period, Paleo-climatology |
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