University of Colorado at Boulder scientists and an international team of researchers have revealed the most in-depth view yet of the Earth's recent climate history by examining Antarctic ice cores. This includes summer and winter temperatures that date back 11,000 years to the start of the Holocene
scientists and an international team of researchers have revealed the most in-depth view yet of the Earth’s recent climate history by examining Antarctic ice cores. This includes summer and winter temperatures that date back 11,000 years to the start of the Holocene epoch., provides the first-ever seasonal temperature record of its kind from any location on the planet.
Scientists around the world use ice cores—cylindrical columns of ice, drilled from ancient ice sheets—gathered from the poles to study Earth’s past climate. Credit: Bradley Markle “This research is something that humans can really relate to because we partly experience the world through the changing seasons—documenting how summer and winter temperature varied through time translates to how we understand climate,” said Jones.Scientists around the world have long studied Earth’s past climate using ice cores gathered from the poles.
Measuring seasonal changes in our planet’s history from ice cores is especially difficult, however, due to the fine detail required for their shorter timescales. A process within ice sheets known as diffusion, or natural smoothing, can blur this needed detail. For more than three decades, researchers at INSTAAR’s Stable Isotope Lab have been studying a variety of stable isotopes—nonradioactive forms of atoms with unique molecular signatures—found everywhere from the inside ice cores and the carbon in permafrost to the air in our atmosphere. Jones joined the lab in 2007 as a master’s student and has never left.
Bruce Vaughn, co-author and manager of the Stable Isotope Lab, and Bradley Markle, a co-author on the study and assistant professor at INSTAAR and the Department of Geology, were there to collect the ice in West Antarctica that was shipped back and analyzed.
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