Browse: Home / Paleo-climatology
By P Gosselin on 8. September 2019
Share this…FacebookTwitterTwo recent scientific publications underscore how mass extinction events are associated with global cool-offs, glaciation and sea level fall, and NOT warmer climates. Life thrives when the globe gets tropically warm. Photo credit: NASA, public domain There’s been a lot of hype and hysteria surrounding the claims that the recent, modest global warming supposedly […]
Posted in Cooling/Temperature, Paleo-climatology, Warming/CO2 Benefiting Earth |
By P Gosselin on 3. September 2019
Share this…FacebookTwitterMore than 1200 publications show the Medieval Warm Period (MWP) was global – an embarrassment to global warming alarmists who claimed it was regional Global warming alarmist scientists like claiming that the well documented Medieval Warm Period (MWP) was mostly a regional, North Atlantic phenomenon, and was not global, and so we just move […]
Posted in Paleo-climatology |
By Kenneth Richard on 2. September 2019
Share this…FacebookTwitterCO2 concentrations ranged between 180 ppm to 220 ppm from about 15 to 60 thousand years ago. Several new temperature reconstructions indicate there were millennial-scale periods with multiple degrees Celsius greater warmth than today (410 ppm CO2) during this glacial period. Image Source: Ganyushkin et al., 2018 Between 45 and 30 thousand years ago, or […]
Posted in Paleo-climatology |
By Kenneth Richard on 22. August 2019
Share this…FacebookTwitterIn recent decades, the Earth’s seas have been rising at a rate of under 0.8 mm/year (8 cm per century) according to estimations of the sum of contributions to sea level rise. In contrast, sea levels rose at rates of more than 40 mm/year ~10,000 years ago. Relative sea level rise can be calculated […]
Posted in Glaciers, Paleo-climatology, Sea Levels |
By P Gosselin on 17. August 2019
Share this…FacebookTwitterAmazing: A proxy study of Laos finds natural variability in hydrometeorology, a little Ice Age, and other substantial climate changes in the pre-greenhouse gas era. Who would have thought! (sarcasm) Hat-tip: NTZ reader Mary Brown. University of California Irvine researcher Jessica Wang and her team of researchers find plenty of natural climate variability in […]
Posted in Drought and Deserts, Little Ice Age, Medieval Warm Period, Natural Variability, Paleo-climatology, Solar |
By Kenneth Richard on 8. August 2019
Share this…FacebookTwitterYet another region of the globe has not warmed (net) for the last 333 years. The authors of a new study (Jiao et al., 2019) point out that temperature changes in the Tianshan mountains are “mainly influenced by the solar activity via the mean minimum temperature within approximately 11-year periods.” Despite some warming since […]
Posted in Cooling/Temperature, Paleo-climatology, Solar Sciences |
By Kenneth Richard on 5. August 2019
Share this…FacebookTwitterMost of the ice currently melting on Greenland only formed during the last few hundred years. Image Source: Mikkelson et al., 2018 A new paper (Axford et al., 2019) reveals NW Greenland’s “outlet glaciers were smaller than today from ~9.4 to 0.2 ka BP” (9,400 to 200 years before 1950), and that “most of […]
Posted in Glaciers, Paleo-climatology |
By Kenneth Richard on 1. August 2019
Share this…FacebookTwitterThe world was much warmer and greener with meters-higher sea levels just a few thousand years ago. Between 9000 to 6000 years ago, when global temperatures were 4-6°C warmer than they are today, the Sahara was a tree- and lake-covered haven teeming with megafauna and human civilizations (Manning and Timpson, 2014). Image Source: LiveScience […]
Posted in Paleo-climatology, Sea Levels |
By Kenneth Richard on 18. July 2019
Share this…FacebookTwitterScientists have found sea levels on India’s eastern coast were still 1-1.5 m higher than today as recently as 500 to 300 years ago and 3-4 m higher than today between 6000 to 4000 years ago. Seas rose and fell by multiple meters (-5 m to +3 m) within 1250 years until as recently […]
Posted in Paleo-climatology, Sea Levels |
By P Gosselin on 6. July 2019
Share this…FacebookTwitterIn Medieval times, the penguins had it nice and warm By Die kalte Sonne (German text translated in the English by P Gosselin) Image Source: Lüning et al. 2019 For a long time it has been said that the Medieval Warm Period was a purely North Atlantic phenomenon. This has proved to be wrong. […]
Posted in Paleo-climatology |
By Kenneth Richard on 1. July 2019
Share this…FacebookTwitterMarine species evolved, thrived, and diversified in 35 to 40°C ocean temperatures and CO2 concentrations “5-10x higher than present-day values” (Voosen, 2019 and Henkes et al., 2018). Image Source: Voosen, 2019 I. The insignificance of modern “global warming” Today’s ocean temperatures average about 16°C. CO2 levels hover around 400 parts per million (0.04%). The […]
Posted in Paleo-climatology |
By P Gosselin on 23. June 2019
Share this…FacebookTwitterThe Medieval Warm Period in Oceania By Die kalte Sonne For a long time it was said that the Medieval Warm Period was a North Atlantic phenomenon. This proved to be wrong. On June 15, 2019, a paper by Lüning et al. 2019 on the Medieval Warm Period in Oceania appeared in the journal […]
Posted in Medieval Warm Period, Paleo-climatology |
By P Gosselin on 19. June 2019
Share this…FacebookTwitterDry Summers Like 2018 Were Common in the Middle Ages Dry summers were not rare 1000 years ago. Researchers from the University of Greifswald’s research group ‘Landscape Ecology and Ecosystem Dynamics’ have been able to reconstruct 1000 years of the dry summer period in northern Germany. Beech forest – photo: Dr. Tobias Scharnweber The […]
Posted in Medieval Warm Period, Paleo-climatology |
By Kenneth Richard on 17. June 2019
Share this…FacebookTwitterIn the first 5½ months of 2019, over 200 scientific papers have been published that cast doubt on the position that anthropogenic CO2 emissions function as the climate’s fundamental control knob…or that otherwise serve to question the efficacy of climate models or the related “consensus” positions commonly endorsed by policymakers and ²²²²mainstream media sources. […]
Posted in Alarmism, Antarctic, Arctic, Climate Sensitivity, CO2 and GHG, Cooling/Temperature, Drought and Deserts, Emissions, Glaciers, Models, Natural Oceanic Oscillations, Natural Variability, Paleo-climatology, Sea Ice, Sea Levels, Solar Sciences, Tectonics/Volcanoes, Warming/CO2 Benefiting Earth, Wind Power |
By Kenneth Richard on 6. June 2019
Share this…FacebookTwitterTwo more new papers add to the voluminous paleoclimate evidence that most of the last 10,000 years were much warmer than modern. The globe was about 4 to 6°C warmer than it is today between 9000 and 6000 years ago, when CO2 concentrations centered around 265 ppm. Image Source: ScienceDaily.com Some regions exceeded the […]
Posted in Hockey Team, Paleo-climatology |
By Kenneth Richard on 23. May 2019
Share this…FacebookTwitterBiomarker evidence for Arctic-region sea ice coverage in the northern Barents Sea indicates the most extensive sea ice conditions of the last 9,500 years occurred during the 20th century (0 cal yr BP). In contrast, this region was ice free with open water conditions during the Early Holocene (9,500-5,800 years ago). Berben et al., […]
Posted in Arctic, Paleo-climatology, Sea Ice |
By Kenneth Richard on 16. May 2019
Share this…FacebookTwitterDuring the last few hundred years, species extinctions primarily occurred due to habitat loss and predator introduction on islands. Extinctions have not been linked to a warming climate or higher CO2 levels. In fact, since the 1870s, species extinction rates have been plummeting. Image Sources: Loehle & Eschenbach (2012), BBC, Wrightstone, 2019 In the […]
Posted in Cooling/Temperature, Paleo-climatology |
By Kenneth Richard on 9. May 2019
Share this…FacebookTwitterAnother new paper published in Paleoceanography and Paleoclimatology casts further doubt on the paradigm that says CO2 has historically been a temperature driver. Evidence from the tropical Atlantic indicates today’s regional temperatures (15.5°C) are 7.5°C colder than a peak temperatures (23°C) between 15,000 to 10,000 years ago, when CO2 hovered around 220 ppm. Image Source: Reißig et […]
Posted in Paleo-climatology |
By Kenneth Richard on 2. May 2019
Share this…FacebookTwitterTree-ring evidence reveals recent cooling and glacier thickening in Central Asia as well as flat temperatures throughout the last 432 years. Tree rings were the proxy used by Dr. Michael Mann to invent the orignal hockey stick graph. Twenty years later, yet another reconstruction (1580 to 2012 AD) indicates modern warmth in Central Asia […]
Posted in Paleo-climatology |
By Kenneth Richard on 25. April 2019
Share this…FacebookTwitterAnother new paper published in Earth and Planetary Science Letters casts further doubt on the paradigm that says CO2 has historically been a temperature driver. Evidence from southern California’s Lake Elsinore indicates today’s regional temperatures (18°C) are 4-5°C colder than a millennial-scale period between 29,000 to 26,000 years ago (29 to 26 ka), or […]
Posted in Paleo-climatology |
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