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Corals, turfgrass and sediments offer stories of climate past and future

Science News reports from San Francisco at the fall meeting of the American Geophysical Union

Hawaiian corals could provide ancient rainfall record

SAN FRANCISCO — Corals off the shore of a Hawaiian island may serve as monitors of groundwater flow and past climate in the region.

As the coral skeletons grew, they likely chronicled changes in the volume of groundwater seeping into the shallows offshore. Those changes, in turn, reflect variations in the island’s rainfall.

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