Articles Tagged: Ice Age

Paleoclimate Researchers Find Connection between Carbon Cycles, Climate Trends

The Ordovician geologic period included a climate characterized by high atmospheric carbon dioxide (CO2) levels, warm average temperatures and flourishing life. Near the end of the period, CO2 levels dropped significantly but precisely when and how fast is poorly known.

Research sheds light on end of Snowball Earth period

The second ice age during the Cryogenian period was not followed by the sudden and chaotic melting-back of the ice as previously thought, but ended with regular advances and retreats of the ice, according to research published by scientists from the University of Birmingham in the journal Nature Geoscience. The researchers also found that the constant advance and retreat of ice during this period was caused by the Earth wobbling on its axis

Heat release from stagnant deep sea helped end last Ice Age

he build-up and subsequent release of warm, stagnant water from the deep Arctic Ocean and Nordic Seas played a role in ending the last Ice Age within the Arctic region, according to new research led by a UCL scientist.

Iceberg armadas not the cause of North Atlantic cooling

Armadas of icebergs were probably not the cause of abrupt episodes of cooling in the North Atlantic over the past 440,000 years, according to new research published today in Nature. Abrupt climate change, characterised by transitions between warm and cold conditions across the North Atlantic, is a pervasive feature of the Late Pleistocene – the most recent period of repeated glacial cycles.

Global cooling likely caused mastodon death: study

Scientists who re-examined the fossils of mastodons that once roamed what is now the Yukon and Alaska have changed their thinking and now believe global cooling probably wiped out the ancient cousin of the elephant.

Fossils cast doubt on climate-change model projections on habitats

According to a new study by Davis and colleagues, fossil records of five ancient mammalian species that survived North America’s last glacial period point to weaknesses in the use of ecological niche models and hindcasting to predict future animal and plant habitats. As a result, Davis says, the modeling needs to be fine-tuned for complexities that might be harvested from fossils.

New theory on cause of ice age 2.6 million years ago

New research ihas provided a major new theory on the cause of the ice age that covered large parts of the Northern Hemisphere 2.6 million years ago. The study found a previously unknown mechanism by which the joining of North and South America changed the salinity of the Pacific Ocean and caused major ice sheet growth across the Northern Hemisphere.

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