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Flowing stream

Mark Roberts works on the gas ion source of the Continuous Flow Accelerator Mass Spectrometer (CFAMS), a Carbon 14 measurement system at WHOI. CFAMS was designed specifically for the continuous monitoring of C-14 in a flowing gas stream. Radiocarbon measurements are critical in determining the age of organic material for climate and other studies.(Photo by Tom Kleindinst, Woods Hole Oceanographic Institution)