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 19. May 2022
Scientists continue to document a sea surface cooling in the vast waters above Antarctica. As recently as a few thousand years ago the Sub-Antarctic (South Georgia) region was 5 to 10°C warmer than it is today (Xia et al., 2020). Image Source: Xia et al., 2020 About 1,000 years ago (the Medieval Warm Period) Antarctica […]
Posted in Antarctic, Cooling/Temperature |
By Kenneth Richard on 24. March 2022
From about 14,000 to 12,000 years ago, when CO2 hovered around a “safe” ~240 ppm, Siberian Arctic July temperatures reached ~8 to 12°C, which is at least 4°C warmer than today (Andreev et al., 2008). Grass grew 300-350 days a year in the late stages of the last glacial in the Siberian Arctic. This allowed […]
Posted in Arctic, Paleo-climatology |
By P Gosselin on 29. December 2021
In a recent paper, scientists expressed their surprise that the Arctic had started warming already back in the early 20th century, 100 years ago. This, along with the obligatory CO2 climate warming lip service, is described in a Cambridge University press release. Hat-tip: Die kalte Sonne ================================== Arctic Ocean started getting warmer decades earlier than […]
Posted in Arctic, Natural Oceanic Oscillations |
By Kenneth Richard on 11. November 2021
The evidence continues to accumulate affirming there is nothing unusual about modern temperature changes – including recent net cooling – throughout large regions of the globe. Cruz et al., 2021 (Argentina) Argentina’s (Tixi Cave) present annual temperature is 13.8°C. It was 3.5°C (17.3°C), 1.7°C (15.5°C), 3°C (16.8°C), and 4.5°C (18.3°C) warmer than today 3496, 1656, […]
Posted in Cooling/Temperature, Paleo-climatology |
By Kenneth Richard on 14. October 2021
From Russia to the Indian Ocean to Antarctica, surface temperatures were much warmer than they are today during Medieval times. 1. The Eastern Russia region was 1.5°C warmer than now during the Medieval Warm Period. The modern warm-up began centuries ago and temperatures have declined in the last few centuries. Relative sea levels were 1 […]
Posted in Medieval Warm Period, Paleo-climatology |
By Kenneth Richard on 7. October 2021
A new study indicates that from 4,000 years ago until as recently as 1,500 years ago, or when CO2 levels ranged between 255 and 270 ppm, lake levels in Antarctica were as high as 60 meters above today’s levels. This coincided with “warmer-than-modern paleoclimate throughout the Holocene.” During the last 2,000 years, Antarctica’s temperatures have […]
Posted in Antarctic, Cooling/Temperature, Paleo-climatology |
By P Gosselin on 13. January 2021
Data show Arctic more stable than media doomsayers portray it to be. In the latter part of the latest Klimaschau video, Arctic mean temperature trends above 70°N are examined: The first chart (8:38) goes back to 2000. Though the running 37-month average rose until 2006, it’s been steady ever since: Source: climate4you Over the last […]
Posted in Misc. |
By Kenneth Richard on 12. November 2020
The southwestern US was nearly a desert from about 9000 to 5000 years ago, when Holocene peaks in aridity, surface temperature, and wildfire rates occurred. Arctic sea ice was at its lowest extent of the Holocene during these years. Image Source: Lachniet et al., 2020 A new extensively-referenced study (Lachniet et al., 2020) reviewing many […]
Posted in Drought and Deserts, Paleo-climatology, Sea Ice |
By Kenneth Richard on 26. October 2020
In a new study, scientists insist that since the Earth’s highest biomass and biodiversity exist in the warmest regions, “higher temperatures than currently existing on Earth” and a “higher water content (absolute humidity) in the atmosphere” seem to be “more favorable” to the planet’s inhabitants. Until a few thousand years ago, when mammoths and wild […]
Posted in Paleo-climatology, Warming/CO2 Benefiting Earth |
By Kenneth Richard on 31. August 2020
Surface temperatures needed to have been much warmer than today to supply enough grass year-round for horses and mammoths to subsist in the Arctic through the Late Holocene. Wrangel Island is located in the Arctic’s Chukchi Sea, which is covered in sea ice for all but a few weeks of the year today (Porter et […]
Posted in Paleo-climatology |
By Kenneth Richard on 27. July 2020
Using biomarker evidence (for example, the Early Holocene presence of sea creatures unable to survive below fixed warmth thresholds) and glacier melt extent measurements (for example, sea shells buried 6 km inside a glacier), scientists have been colloborating on a growing consensus that much of Arctic Svalbard was about 7°C warmer than today during the […]
Posted in Arctic, Glaciers, Paleo-climatology |
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