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Unearthing climate clues buried in ice

February 13, 2019

A blue tent sits on a field of ice and snow, with a University of Rochester MELIORA flag flying in front.EVER…COLDER: The Meliora flag flies high at the Law Dome research station in Antarctica, where scientists from the University of Rochester are leading a research effort aimed at understanding how human activity has affected the ability of the atmosphere to cleanse itself. One of the goals of the project is to estimate changes in the concentration of atmospheric hydroxyl radicals since the pre-industrial period. Hydroxyl radicals are the main atmospheric oxidant and are responsible for removing reactive greenhouse gases such as methane as well as many pollutants such as carbon monoxide.

 

Metal container filled with dozens of long, cylindrical ice cores.
TRAPPED IN ICE: The research team—which includes Vasilii Petrenko, associate professor of Earth and environmental sciences, postdoctoral research associate Peter Neff, and laboratory manager Edward Crosier—recently spent three months in Antarctica. The group drilled more than 1000 meters of ice core and extracted approximately 500 liters of ancient air trapped in the ice. This is a continuation of their research to analyze ice samples for clues about past and present climate change.

 

sunset over a camp of tents on a vast field of ice and snow.

NO SNOW DAYS: Conditions in the field this past season, including bitter cold temperatures and some of the heaviest snowfalls in the world, made data collection difficult, Petrenko says. “This was probably the most challenging polar field campaign that my group has ever undertaken because of the length of the field season, tremendously bad weather, multiple logistical hurdles, and the difficulties associated with cleanly drilling the ice cores and extracting ancient air from them.”

This research is jointly supported by the US National Science Foundation and the Australian Antarctic Division.

(University of Rochester photos / Vasilii Petrenko)

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Category: Science & Technology