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By Kenneth Richard on 29. September 2022
Share this…FacebookTwitterGreenland’s climate changes are remarkably uncorrelated with climate model expectations and changes in atmospheric CO2. When CO2 levels were in the mid-200s parts per million (11.7 to 4.5 thousand years ago) the Arctic and northern Greenland were 2-4°C warmer than now, ice margins were 80 km behind today’s, ice-free open water conditions prevailed, and […]
Posted in Arctic, Paleo-climatology |
By Kenneth Richard on 15. September 2022
Share this…FacebookTwitterYet another new study documents the lack of regional cooperation with the “global” warming narrative. Since 1979 there has been no net warming in the South China Sea and no evidence of a hiatus or “growth discontinuity” in this region’s coral development (Tan et al., 2022). Natural ENSO variation leads changes in the sea […]
Posted in Cooling/Temperature, Natural Oceanic Oscillations, Paleo-climatology |
By Kenneth Richard on 5. September 2022
Share this…FacebookTwitterAbundant polar bear remains dating to 8000 to 9000 years ago have been found on Zhokhov Island, which is today surrounded by year-round sea ice (even in summer). This Arctic latitude (76°N) is too cold and thus too ice-covered for polar bears to inhabit today. During the Early Holocene CO2 concentrations ranged between 255 […]
Posted in Arctic, Paleo-climatology, Sea Ice |
By Kenneth Richard on 1. September 2022
Share this…FacebookTwitterNew studies identify sites in Portugal, southern Africa, and Arctic Svalbard that have not warmed in the last few centuries. Daily temperature records in northern Portugal indicate no net warming from 1863-2004 (Nunes, 2022). Also, the Medieval Warm Period was warmer than the 21st century at this location. Image Source: Nunes, 2022 Affirming this […]
Posted in Cooling/Temperature, Paleo-climatology |
By Kenneth Richard on 29. August 2022
Share this…FacebookTwitterA new study details how a much warmer climate than today led to the disappearance of glaciers and ice caps during the sub-300 ppm CO2 Early to Middle Holocene. The Arctic’s modern ice extent is among the largest of the last 10,000 years. Glaciologists Larocca and Axford (2022) have synthesized a comprehensive record of […]
Posted in Arctic, Glaciers, Paleo-climatology |
By Kenneth Richard on 25. July 2022
Share this…FacebookTwitterA warmth-demanding plant can provide us with solid evidence of a much warmer than today Mid-Holocene climate. Growth of the tropical aquatic plant 𝐶𝑒𝑟𝑎𝑡𝑜𝑝𝑡𝑒𝑟𝑖𝑠 ceases when air temperatures fall below 10°C. A new study says that from about 8000 to 5000 years ago it was warm enough in winter that 𝐶𝑒𝑟𝑎𝑡𝑜𝑝𝑡𝑒𝑟𝑖𝑠 could grow at the […]
Posted in Paleo-climatology |
By Kenneth Richard on 18. July 2022
Share this…FacebookTwitterDue to a “relatively stable warm climate” the Medieval Warm Period (800 to 1300 CE) was a period of expanding Scandinavian population, increasing trade, food and goods production. There has been a ~500 zettajoule (ZJ) increase in global ocean heat energy since 1750. The Medieval Warm Period global ocean had 1000 ZJ more heat […]
Posted in Medieval Warm Period, Paleo-climatology |
By Kenneth Richard on 14. July 2022
Share this…FacebookTwitterThe Western North Pacific has continued cooling over the last millennium, with no reversal in trends after the Little Ice Age. Earlier this year we highlighted a study showing corals thrive in multiple-degrees-warmer-than-today waters and their growth is stunted in cooler environments. Corals in the Western North Pacific near Japan were far more abundant […]
Posted in Cooling/Temperature, Paleo-climatology |
By Kenneth Richard on 11. July 2022
Share this…FacebookTwitterA new study (Boulila et al., 2022) suggests “abrupt and severe changes in Earth’s past climate” have been occurring at ~1,500-year periodicities since the iceless Jurassic period. Warming events of degrees C per within decades or less were at one time thought to have occurred only at locations like Greenland and the North Atlantic […]
Posted in Paleo-climatology |
By Kenneth Richard on 4. July 2022
Share this…FacebookTwitterThese much warmer Greenland temperatures imply that the elevation of the ice sheet was 400 meters lower than it is today from about 6,000 to 10,000 years ago. Scientists (Westhoff et al., 2022) report that the two largest Greenland melt events in the last few hundred years occurred in 2012 and in 1889 CE […]
Posted in Arctic, Glaciers, Medieval Warm Period, Paleo-climatology |
By Kenneth Richard on 9. June 2022
Share this…FacebookTwitterSeveral new and recent studies have affirmed that the waters surrounding South America – from Peru to Chile to Argentina to Brazil – were several degrees warmer and sea levels multiple meters higher than today until the Little Ice Age centuries. A new study suggests ~4,000 to 5,000 years ago coastal Argentina’s sea surface […]
Posted in Cooling/Temperature, Oceans, Paleo-climatology, Sea Levels |
By Kenneth Richard on 26. May 2022
Share this…FacebookTwitterA new study (Gao et al., 2022) suggests Antarctica’s sea levels (Ross Sea) were more than 16 meters higher than today ~5,000 years ago and still 5.5 meters higher ~3,000 years ago. Penguins thrived with the warmer climate and diminished sea ice. Image Source: Gao et al., 2022 “Since 1.5 kyr BP, with further […]
Posted in Antarctic, Paleo-climatology, Sea Levels |
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