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.
A coral colony’s hard parts are mostly made of calcium carbonate, but as the cr