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By Kenneth Richard on 14. January 2021
Share this…FacebookTwitterScientists continued defying the “unprecedented” global warming narrative by publishing nearly 150 papers in 2020 that show large regions of the Earth (a) haven’t warmed in recent decades, (b) were as-warm or warmer within the last several centuries, and/or (c) were 1-7°C warmer than today just a few millennia ago. Here is the link […]
Posted in Cooling/Temperature, Medieval Warm Period, Paleo-climatology |
By Kenneth Richard on 4. January 2021
Share this…FacebookTwitterIn 2020, scientists continued to publish papers affirming global sea levels are today about 2 meters lower than they were a few thousand years ago. During the last interglacial (~116 to 128 thousand years ago), when CO2 peaked at just 280 ppm but surface temperatures were so much warmer that much less water was […]
Posted in Paleo-climatology, Sea Levels |
By Kenneth Richard on 31. December 2020
Share this…FacebookTwitterA new study affirms coral reefs grow when seas are warm and rising. Growth “shuts off” during colder, falling sea level periods. Consequently, the Great Barrier Reef has experienced growth in the last 150 years – especially in recent decades. During the Last Glacial Maximum (~30,000 to 15,000 years ago), when Great Barrier Reef […]
Posted in Coral Reefs, Paleo-climatology, Sea Levels |
By P Gosselin on 18. December 2020
Share this…FacebookTwitterUndisputed temperature reconstructions from around the world show the planet was much warmer over most of the Holocene (past 10,000 years) than it is today. Kenneth recently wrote how a wealth of new research in glacier and sea ice extent show modern Iceland is 2-4°C colder than all of the last 8000 years. Only […]
Posted in Cooling/Temperature, Glaciers, Paleo-climatology |
By Kenneth Richard on 17. December 2020
Share this…FacebookTwitterScientists are increasingly finding that abrupt, decadal-scale temperature changes of multiple degrees Celsius can arise unforced and spontaneously. The surface temperatures for the Greenland ice sheet have been known to warm 8 to 16°C “within decades or less” – yes, fewer than 10 years – due to “unforced oscillations.” In other words, no external […]
Posted in Natural Oceanic Oscillations, Natural Variability, Paleo-climatology |
By Kenneth Richard on 14. December 2020
Share this…FacebookTwitterA wealth of new research in glacier and sea ice extent show modern Iceland is 2-4°C colder than all of the last 8000 years except for a slightly colder late 19th century. Even the 1700s were warmer with less ice than today in and around Iceland. A new study (Geirsdóttir et al., 2020) now […]
Posted in Arctic, Cooling/Temperature, Glaciers, Paleo-climatology, Sea Ice |
By Kenneth Richard on 30. November 2020
Share this…FacebookTwitterScientists report they must “exclude atmospheric pCO2 as a direct driver of SST variations” after finding the Atlantic Ocean’s surface was multiple degrees warmer than today from 90 to 20 thousand years ago, or when CO2 concentrations hovered below 200 ppm. Another new study (Hou et al., 2020) casts even more doubt on the […]
Posted in Climate Sensitivity, CO2 and GHG, Paleo-climatology |
By Kenneth Richard on 23. November 2020
Share this…FacebookTwitterCO2 reached 1980s (352 ppm, average) to 2000s (380 ppm, max) levels 2500-5500 years ago in Japan per stomata records. Scientists (Wang et al., 2020) have determined stomatal evidence can uncover large short-term CO2 fluxes of 50-100 ppm within a century or less. Measurements from a forest near Mt. Kurikoma, Japan, reveal minimum to […]
Posted in CO2 and GHG, Paleo-climatology |
By P Gosselin on 22. November 2020
Share this…FacebookTwitterAtmospheric CO2 just doesn’t change on a whim and cause global temperature to follow along in response. Press release from The Alfred Wegener Institute (AWI): Irregular Appearances of Glacial and Interglacial Climate States During the last 2.6 million years of Earth’s climate has altered between glacial and interglacial states. As such, there have been […]
Posted in Paleo-climatology |
By Kenneth Richard on 16. November 2020
Share this…FacebookTwitterReconstructions of past temperatures show much colder periods with higher CO2 levels or as-warm or warmer periods with much lower CO2 levels. A new study (Paus, 2020) indicates modern July temperatures center around 7.5 to 8°C in the Scandes Mountains (Norway). Today’s CO2 atmospheric concentration has reached 410 ppm. During the latter stages of […]
Posted in CO2 and GHG, Little Ice Age, Paleo-climatology |
By Kenneth Richard on 12. November 2020
Share this…FacebookTwitterThe 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 […]
Posted in Drought and Deserts, Paleo-climatology, Sea Ice |
By Kenneth Richard on 9. November 2020
Share this…FacebookTwitterOnly a few thousand years ago, when CO2 levels were both stable and low (~265 ppm), the (1) Arctic had far less ice and more vegetation than it does now and (2) the massive rate of ice melt in Antarctica rendered modern melt rates negligible by comparison. A new study (Cherezova et al., 2020) […]
Posted in Antarctic, Arctic, Glaciers, Paleo-climatology |
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