Higher sea levels were due to a warmer climate, or the consequence of more water in ocean basins rather than locked up on land as ice.

The post New Study: Chile’s Relative Sea Level Was 3.2 Meters Higher Than Today During The Mid-Holocene appeared first on Watts Up With That?.

Three new tree ring reconstructions (spanning 1320-2021, 1720-2014, and 1657-2020 CE) document the dominance of natural variability in the paleoclimate record.

The post New Paleo Research: Modern ‘Climate Change’ Has Had No Apparent Impact On Precipitation Patterns appeared first on Watts Up With That?.

A new geological study sheds light on a previously hidden phase of the Colorado River’s history. Geologists have uncovered what happened to the Colorado River during a mysterious missing stretch of its history millions of years ago. Research published in Science shows that the river once flowed into a large inland lake for several million [...]

Researchers have applied a temperature proxy to exceptionally well-preserved fossil phytoplankton for the first time. The results suggest that conditions in the North Atlantic have been cooler than previously believed since the Miocene epoch. Accurate forecasts of how Earth’s climate will respond to rising atmospheric carbon dioxide depend on climate models. To test and refine [...]

Published studies show that science has long been aware of significantly more extreme and rapid temperature shifts throughout Earth’s history.

The post Abrupt Climate Change Also Occurred NATURALLY In The Past …25 Times During Last Ice Age appeared first on Watts Up With That?.

Fuerteventura, one of the eight major Canary Islands, was not the “desert in the ocean” it is today throughout the Early to Middle Holocene.

The post Cave Discovery Reveals Today’s Desert Climates Were Recently Far Warmer, Wetter, Teeming With Life appeared first on Watts Up With That?.

The presence of such biological material is undeniable evidence that glaciers have historically expanded and retreated in natural cycles long before industrial CO2 emissions [04:10].

Ancient Antarctic ice is revealing a more detailed and unexpected picture of Earth’s climate history. New research on ancient Antarctic ice and the air trapped within it is extending the timeline of Earth’s climate history and offering new insight into how the planet has evolved over the past 3 million years. The results, published in [...]

Ancient Antarctic ice sheet cycles affected subtropical ocean productivity by altering nutrient circulation. The 40,000-year obliquity cycle played an unexpectedly strong role, revealing deep global climate connections. Fluctuations in Antarctica’s ice sheets once influenced marine life far beyond the polar regions, shaping biological productivity in subtropical oceans thousands of miles away.…

Settled science becomes unsettled....film at 11.

The truth is, no one can ever know. And this is where the science rubber really hits the road.

Carbon dioxide levels in this dataset vary between 170 parts per million (ppm) and 280 ppm. If the level had fallen below 150 ppm, photosynthesis would have stopped and an almost certain mass extinction of land-based life would have occurred. Hatton observes that in 556 centuries of the 800,000-year Vostok database, CO2 was below 190 ppm.

New geological evidence suggests that the slow wobble of Earth’s axis may have triggered rapid climate swings during the Late Cretaceous greenhouse world. When audiences watched The Day After Tomorrow, they saw a dramatic Hollywood depiction of sudden climate chaos. The film greatly compresses the timeline, but the underlying idea that Earth’s climate can change [...]

Ancient DNA preserved in seabed sediments suggests Doggerland hosted temperate forests far earlier than expected. Forests covered parts of Doggerland, the now-submerged landmass beneath the North Sea, thousands of years earlier than scientists once thought. The conclusion comes from a large study of sedimentary ancient DNA (sedaDNA) led by researchers at the University of Warwick. [...]

In contrast to the dramatic climate shifts tied to volcanism and “unforced natural climate variability,” modern Greenland has not warmed (net) in the last 100 years despite the foreboding “anthropogenic forcing” that we have been warned about since the 1980s.

In climate policy, confidence should track evidence. And here, the evidence points not to imminent tropical marine extinction at 1.5 °C, but to a system that has endured comparable warming before without collapsing.

“D–O signals [10-16°C warming events within decades to centuries] are not just seen in Greenland – they are registered globally.” – Liu et al., 2026

A new pollen-based reconstruction study shows Greenland warmed 10–16°C within decades during 11 Dansgaard–Oeschger events between 57,000 and 29,000 years ago, when atmospheric CO₂ was near 200 ppm. These globally expressed, circulation-driven shifts demonstrate that rapid, large climate changes occurred naturally under low and relatively stable carbon dioxide levels.

It is highly unlikely that today is the warmest Earth has been in the past 6,800-7,800 years or that today's warming is unprecedented.