WHOI Associate Scientist Matt Charette (left) and Research Assistant Matt Allen use pumps and instruments deployed on a canoe to collect water samples from Pamet Harbor in Truro, Mass. By measuring the amount of dissolved radon and other chemical tracers—leached naturally from rocks or introduced by septic systems—they can measure the flow of submarine groundwater into the coastal ocean. (Tom Kleindinst,
WHOI Graphic Services.)[back]
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