An abrupt episode of global warming marked the end of the Paleocene epoch. Oxygen and
carbon isotope records from two widely separated sites support the notion that degassing of …

A methane record from the GISP2 ice core reveals that millennial-scale variations in
atmospheric methane concentration characterized much of the past 110,000 years. As …

The low O2 content of the Archean atmosphere implies that methane should have been
present at levels∼ 102 to 103 parts per million volume (ppmv)(compared with 1.7 ppmv …

A record of atmospheric carbon dioxide (CO2) concentration during the transition from the
Last Glacial Maximum to the Holocene, obtained from the Dome Concordia, Antarctica, ice …

A simple climate model has been used to calculate the effect of past changes in the land-sea
distribution on the seasonal cycle of temperatures during the last 100 million years. Modeled …

The present climate, which falls between the last ice age and the next, is relatively stable.
New data on past climate change, however, indicates that the climate is capable of …

Like most Earth scientists, we are intrigued and amazed by recent discoveries from ice-core
and marine sediments that global climate and the ocean-atmosphere system can abruptly …

A paleotemperature record based on measurements of atmospheric noble gases dissolved
in ground water of the Carrizo aquifer (Texas) shows that the annual mean temperature in …

During the last glacial period, Earth's climate underwent frequent large and abrupt global
changes. This behavior appears to reflect the ability of the ocean's thermohaline circulation …

In the Jurassic period, the Early Toarcian oceanic anoxic event (about 183 million years
ago) is associated with exceptionally high rates of organic-carbon burial, high …