Paleo-climatology

New Study: The Reality Of The Medieval Warm Period Confirmed By Changes In Agricultural Practices

New Study: The Reality Of The Medieval Warm Period Confirmed By Changes In Agricultural Practices

Share this… Facebook TwitterDue 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 […]

New Study Indicates Coral Presence Around Japan Has Plummeted With The Onset Of Global Cooling

New Study Indicates Coral Presence Around Japan Has Plummeted With The Onset Of Global Cooling

Share this… Facebook TwitterThe 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 […]

Global-Scale Warming Events Of 'Up To 15 °C Within A Few Decades' Have Occurred Since The Jurassic

Global-Scale Warming Events Of ‘Up To 15 °C Within A Few Decades’ Have Occurred Since The Jurassic

Share this… Facebook TwitterA 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 […]

New Study: Greenland 'Must Have Been At Least 3°C Warmer' Than Today During The Early Holocene

New Study: Greenland ‘Must Have Been At Least 3°C Warmer’ Than Today During The Early Holocene

Share this… Facebook TwitterThese 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 […]

South America's Sea Levels Were Multiple Meters Higher And SSTs 2-5°C Warmer Until Recent Centuries

South America’s Sea Levels Were Multiple Meters Higher And SSTs 2-5°C Warmer Until Recent Centuries

Share this… Facebook TwitterSeveral 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 […]

A Warmer Climate, Less Sea Ice, Sea Levels 5-16 Meters Higher Than Today An 'Optimum' For Penguins

A Warmer Climate, Less Sea Ice, Sea Levels 5-16 Meters Higher Than Today An ‘Optimum’ For Penguins

Share this… Facebook TwitterA 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, […]

Global Sea Surface Temperature Records Suggest Only Modest Warming In The 20th And 21st Centuries

Global Sea Surface Temperature Records Suggest Only Modest Warming In The 20th And 21st Centuries

Share this… Facebook TwitterGlobal sea surface temperatures have only been warming at a rate of about 0.06°C per decade since 1950. According to Dieng et al., 2017, global sea surface temperatures (SST) cooled slightly (-0.006°C/decade) from 2003 to 2013. This reduced the overall 1950-2014 warming rate to 0.059°C per decade. Image Source: Dieng et al., […]

The Evidence Keeps Piling Up: Iceland Is Not Cooperating With The ‘Global Warming’ Agenda

Share this… Facebook TwitterIf decadal- and century-scale glacier advance and retreat is strongly indicative of a region’s climate, glacier behavior in Iceland saps the narrative that says anthropogenic CO2 is a climate driver. Per a new study, many of the northern Icelandic glaciers in existence today had “disappeared” from about 10,000 to 6,000 years ago. […]

Deliberately Alarmist 'The Last Time CO2 Was This High' Claims Are Rooted In Guesswork, Not Science

Deliberately Alarmist ‘The Last Time CO2 Was This High’ Claims Are Rooted In Guesswork, Not Science

Share this… Facebook TwitterRecent reconstructions suggest CO2 concentrations may have ranged between 150 and 600 ppm (or more) throughout the last 4 million years. We routinely see screaming headlines such as CO2 in the Atmosphere Climbs to Highest Level in 4.5 Million Years or Carbon Dioxide Levels Reach Highest Point in Human History. However, these […]

Climate Past Far From Settled: 7 Major Temperature Reconstructions Find No Agreement

Share this… Facebook TwitterA new paper published in open access publishing MDPI looks at seven prominent hemispheric and global temperature reconstructions for the past 2000 years (T2k). The analysis conducted by the authors found that some reconstructions “differed from each other in some segments by more than 0.5 °C” whilst some show negligible pre-industrial climate […]

Comprehensive European Study Finds Warmer Climate Periods Do Not Lead To More Conflict, War

Comprehensive European Study Finds Warmer Climate Periods Do Not Lead To More Conflict, War

Share this… Facebook TwitterAnalysis of 1000 years of European wars finds that more war and conflict are not linked to warm climates. One of the scare stories used by the global warming alarmists is the claim that climate extremes produced by manmade climate change will lead to greater strife and more bloody wars. Hat-tip: Klimaschau […]

Horses Grazed On Grass Year-Round In A Birch-Forested Siberian Arctic Until 2200 Years Ago

Horses Grazed On Grass Year-Round In A Birch-Forested Siberian Arctic Until 2200 Years Ago

Share this… Facebook TwitterFrom 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 […]

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