Browse: Home / 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 |
By Kenneth Richard on 18. April 2019
Share this…FacebookTwitterAccording to the calculations of Dr. James Hansen, the radiative influence derived from the increase in CO2 during the last deglaciation was so negligible that it equated to “a third of energy required to power a honey bee in flight” (Ellis and Palmer, 2016). Image Source: Ellis and Palmer, 2016 Between about 22,000 and […]
Posted in Climate Sensitivity, CO2 and GHG, Glaciers, Paleo-climatology |
By Kenneth Richard on 4. April 2019
Share this…FacebookTwitterA new paper indicates the rise in CO2 concentration occurred well after the Northern Hemisphere’s ocean circulation changes drove the abrupt warming (~11,700 years ago) that ended the last ice age – a lag that effectively leaves no causal role for CO2 during deglaciation. Image Source: Muschitiello et al., 2019 Ice core evidence from […]
Posted in Cooling/Temperature, Paleo-climatology |
By P Gosselin on 30. March 2019
Share this…FacebookTwitterA new study has just come out in the journal Earth and Planetary Science Letters: Biomarkers reveal abrupt switches in hydroclimate during the last glacial in southern California. Hat-tip: reader Mary Brown It contradicts claims often made by global warming alarmists that the perceived California climate change is unusual, and that it is mostly […]
Posted in Paleo-climatology |
By Kenneth Richard on 22. March 2019
Share this…FacebookTwitterCould a transition in paleoclimate reconstruction be underway? More and more, scientists aren’t hiding statements or graphical depictions of the lack of modern warming or the much-warmer Holocene past. A compilation of 35 papers from across the globe indicate that modern climate is not unusual, remarkable or unprecedented, and that large regions of the […]
Posted in Hockey Team, Paleo-climatology |
By Kenneth Richard on 11. March 2019
Share this…FacebookTwitterDuring the Mid-Holocene, when CO2 concentrations were stable and low (270 ppm), Antarctica’s massive Ross Ice Shelf naturally collapsed, adding the meltwater equivalent of 3-4 meters to sea levels. Because CO2 concentrations changed very modestly during the pre-industrial Holocene (approximately ~25 ppm in 10,000 years), climate models that are predicated on the assumption that […]
Posted in Antarctic, Glaciers, Paleo-climatology, Sea Levels |
By Kenneth Richard on 25. February 2019
Share this…FacebookTwitterZhokhov Island in the Siberian High Arctic today exhibits inhospitably severe climate conditions, desolate tundra, and year-round pack ice in the surrounding sea. During the Early Holocene this same island was warm enough to host waterfowl species, birch trees, and year-round human residents who hunted polar bear and reindeer. Image Source: Makeyev et al., […]
Posted in Arctic, Paleo-climatology |
By Kenneth Richard on 18. February 2019
Share this…FacebookTwitter I. According to the IPCC, the true manifestation of “global warming” can almost exclusively (93%) be found in the oceans. The surface air or atmospheric heat changes amount to just 1% of the “global warming” representation. Image Source: IPCC (2013) II. In the first 2000 meters of the global ocean, there has only […]
Posted in Natural Variability, Oceans, Paleo-climatology, Scepticism |
By P Gosselin on 5. February 2019
Share this…FacebookTwitterThe European Institute for Climate and Energy (EIKE) posted a video of prominent German geologist Dr. Stefan Kröpelin, who in a presentation late last year in Munich called the notion of CO2-induced climate tipping points scientifically outlandish. He also called the prospect of the Sahara spreading into Europe preposterous. EIKE recently wrote an article […]
Posted in Drought and Deserts, Paleo-climatology, Scepticism |
By Kenneth Richard on 3. January 2019
Share this…FacebookTwitterIn 2018, over 500 scientific papers were 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 mainstream media sources. More than 500 scientific papers published […]
Posted in Alarmism, Alternative Energy, Antarctic, Arctic, Climate Sensitivity, CO2 and GHG, Cooling/Temperature, Drought and Deserts, Glaciers, Hockey Team, Hurricanes/Tornados, Natural Variability, Ocean Acidification, Paleo-climatology, Scepticism, Sea Ice, Sea Levels, Solar Sciences, Tectonics/Volcanoes, Warming/CO2 Benefiting Earth, Wind Power |
By Kenneth Richard on 24. December 2018
Share this…FacebookTwitterTree Trunk Conundrum Image Source: Ganyushkin et al., 2018 Between 60 and 40 thousand years ago, during the middle of the last glacial, atmospheric CO2 levels hovered around 200 ppm – half of today’s concentration. Tree remains dated to this period have been discovered 600-700 meters atop the modern treeline in the Russian Altai […]
Posted in Paleo-climatology |
By Kenneth Richard on 13. December 2018
Share this…FacebookTwitterUnmasking Marcott’s “Uptick” 20th century “uptick” from Marcott et al., 2013, RealClimate.org Almost immediately after it was introduced to the public, the lead author of Marcott et al. (2013) squelched the narrative that said the hockey-stick-shaped reconstruction he and his colleagues produced is a robust representation of modern global-scale temperature changes. In an interview with Marcott […]
Posted in Data Manipulation, Hockey Team, Medieval Warm Period, Paleo-climatology |
By Kenneth Richard on 26. November 2018
Share this…FacebookTwitterNewly published macrofossil discoveries from 4 papers strongly suggest that modern warmth may still be about 3°C colder than nearly all of the last 10,000 years. Image Source: Leunda et al. (2018) 1. Permafrost is still present today in a region that was permafrost-free throughout the Holocene (until the onset of the Little Ice Age) […]
Posted in Little Ice Age, Paleo-climatology |
By Kenneth Richard on 22. November 2018
Share this…FacebookTwitterThe evidence that “global” warming has not been global in scale continues to accumulate. Two more new reconstructions from the Western Pacific (He et al., 2018) and subpolar North Atlantic (Orme et al., 2018) indicate that modern temperatures have continued to decline since the onset of the Little Ice Age. These add to the […]
Posted in Cooling/Temperature, Paleo-climatology |
By P Gosselin on 3. November 2018
Share this…FacebookTwitterGlobal warming alarmist scientists like claiming that the well documented Medieval Warm Period (MWP) was merely a regional phenomenon, and not global. However a new publication by Lüning et al adds yet another study that shows the warm period from 1000 years ago was indeed global. ================================ Image source: here. Preindustrial climate change in […]
Posted in Paleo-climatology |
By Kenneth Richard on 15. October 2018
Share this…FacebookTwitterIn the first 9½ months of 2018, 368 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 mainstream media sources. These […]
Posted in Alarmism, Antarctic, Arctic, Climate Sensitivity, CO2 and GHG, Cooling/Temperature, Glaciers, Hockey Team, Hurricanes/Tornados, Medieval Warm Period, Natural Oceanic Oscillations, Natural Variability, Ocean Acidification, Paleo-climatology, Sea Ice, Sea Levels, Solar |
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