Variations in Earth's orbit pace the glacial-interglacial cycles of the Quaternary, but the
mechanisms that transform regional and seasonal variations in solar insolation into glacial …

Glaciation during the late Palaeozoic era (340–250 Myr ago) is thought to have been
episodic, with multiple, often regional, ice-age intervals, each lasting less than 10 million …

The past rapid growth of Northern Hemisphere continental ice sheets, which terminated
warm and stable climate periods, is generally attributed to reduced summer insolation in …

Abstract Late Paleozoic glaciation on Gondwana is associated with changes in geography,
solar luminosity, and estimated CO2 levels. To assess the relative importance of these …

Earth's last icehouse, 300 million years ago, is considered the longest-lived and most acute
of the past half-billion years, characterized by expansive continental ice sheets, and possibly …

During the Mid-Pleistocene Transition (MPT; 1,200–800 kya), Earth's orbitally paced ice age
cycles intensified, lengthened from∼ 40,000 (∼ 40 ky) to∼ 100 ky, and became distinctly …

Abstract The Pliocene Epoch (∼ 5.3–2.6 million years ago, Ma) was characterized by a
warmer than present climate with smaller Northern Hemisphere ice sheets, and offers an …

Reconstructions of ancient atmospheric carbon dioxide (CO2) variations help us better
understand how the global carbon cycle and climate are linked. We compared CO2 …

A major puzzle of paleoclimatology is why, after a long interval of cooling climate, each late
Quaternary ice age ended with a relatively short warming leg called a termination. We here …

Climate variability over the past 800,000 years has long been described as being dominated
by~ 100-kyr glacial cycles, and researchers have debated whether these glacial cycles were …