By P Gosselin on 8. November 2022
Changing Holocene climate…was never steady Researchers say the 5300 year old Ötzi corpse didn’t remain covered by ice 5300 years long, but in fact was exposed again and again! Figure 1. Orthophoto of the findspot in the Tisenjoch (1) and other locations mentioned in the text (2: Kesselwandferner, 3: Weißseespitze, 4: Hintereisferner, 5: Langgrubenjoch, 6: […]
Posted in Glaciers, Paleo-climatology |
By Kenneth Richard on 31. October 2022
Sites in Canada and Africa were warmer than today throughout nearly the entirety of the Holocene. Canada Per a new study, eastern Canada mean summer temperatures are 13.6°C and July temperatures average 15°C today. For nearly all of the Holocene the region was 1-1.5°C warmer (16.5°C, July) than it is now. In other words, except […]
Posted in Cooling/Temperature, Paleo-climatology |
By Kenneth Richard on 24. October 2022
The Earth was still in ice age conditions 14,700 to 12,900 years ago, or during the “Bolling interstadial.” CO2 hovered near 230 ppm at that time, and yet “continental Europe was a few degrees warmer than present” (Toth et al., 2022). In recent years there have been multiple studies detailing a European climate that was […]
Posted in Paleo-climatology |
By Kenneth Richard on 13. October 2022
During the much-warmer-than-today Mid-Holocene, when CO2 concentrations lingered around 265 ppm, sea levels were multiple meters higher than they are now. From about 5000 to 7000 years ago, when Earth was several degrees warmer than it is today, there was less water locked up on land as ice. Consequently, relative sea levels were much higher […]
Posted in Paleo-climatology, Sea Levels |
By Kenneth Richard on 29. September 2022
Greenland’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 Greenland […]
Posted in Arctic, Paleo-climatology |
By Kenneth Richard on 15. September 2022
Yet 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 surface […]
Posted in Cooling/Temperature, Natural Oceanic Oscillations, Paleo-climatology |
By Kenneth Richard on 5. September 2022
Abundant 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 to […]
Posted in Arctic, Paleo-climatology, Sea Ice |
By Kenneth Richard on 1. September 2022
New 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 temperature […]
Posted in Cooling/Temperature, Paleo-climatology |
By Kenneth Richard on 29. August 2022
A 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 Arctic-wide […]
Posted in Arctic, Glaciers, Paleo-climatology |
By Kenneth Richard on 25. July 2022
A 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 40°N […]
Posted in Paleo-climatology |
By Kenneth Richard on 18. July 2022
Due 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 energy […]
Posted in Medieval Warm Period, Paleo-climatology |
By Kenneth Richard on 14. July 2022
The 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 than […]
Posted in Cooling/Temperature, Paleo-climatology |
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