Big climate patterns Ice cores draw the attention of climate researchers because the ratio of oxygen isotopes in the ice acts like a thermometer for past climate and sea surface temperatures.

Big climate patterns Ice cores draw the attention of climate researchers because the ratio of oxygen isotopes in the ice acts like a thermometer for past climate and sea surface temperatures.

A Greenland ice core shows that volcanoes quietly release ... so better estimates could improve the accuracy of long-term projections. Volcanoes draw plenty of attention when they erupt.

Princeton University-led researchers have extracted 2 million-year-old ice cores from Antarctica that provide the first direct observations of Earth’s climate at a time when the furred early ancestors ...