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New study by WHOI scientists provides baseline measurements of carbon in Arctic Ocean
Date:5/21/2012

Scientists from the Woods Hole Oceanographic Institution (WHOI) have conducted a new study to measure levels of carbon at various depths in the Arctic Ocean. The study, recently published in the journal Biogeosciences, provides data that will help researchers better understand the Arctic Ocean's carbon cyclethe pathway through which carbon enters and is used by the marine ecosystem. It will also offer an important point of reference for determining how those levels of carbon change over time, and how the ecosystem responds to rising global temperatures.

"Carbon is the currency of life. Where carbon is coming from, which organisms are using it, how they're giving off carbon themselvesthese things say a lot about how an ocean ecosystem works," says David Griffith, the lead author on the study. "If warming temperatures perturb the Arctic Ocean, the way that carbon cycles through that system may change."

Griffith's team sampled suspended particles of organic matter, as well as organic carbon and carbon dioxide (CO2) dissolved into the surrounding water. This is the first time that researchers have focused broadly on measuring multiple types of carbon at the same time and place in the Arctic Oceandue to its remote location and the challenges of operating in sea ice, few comprehensive carbon surveys had been conducted there before this study.

Griffith and his colleagues conducted their fieldwork in 2008 aboard the Canadian Coast Guard icebreaker Louis S. St. Laurent. At two different spots in the Canada Basin, an area northwest of the Canadian coast, they gathered samples from 24 depths ranging from the surface to the ocean floor 3800 meters (roughly 12,500 feet) below.

Collecting samples at those intervals was necessary, Griffith says, because the Arctic Ocean is separated into distinct layers, each with its own unique carbon characteristics. At the surface is a freshwater layer from river runoff and sea-ice melt. Belo
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Contact: WHOI Media Relations Office
media@whoi.edu
508-289-3340
Woods Hole Oceanographic Institution
Source:Eurekalert  

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New study by WHOI scientists provides baseline measurements of carbon in Arctic Ocean
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