High tides lash a Destin, Florida, pavilion—usually on dry land—ahead of tropical storm Claudette on August 17, 2009. Aside from such short-term events as storms, anomalous wind and ocean patterns caused a sustained and unexpected rise in sea levels on the U.S. East Coast through much of summer 2009, according to a September 2009 report. Photograph by Mari Darr-Welch/AP From National Geographic:
Sea levels rose as much as 2 feet (60 centimeters) higher than predicted this summer along the U.S. East Coast, surprising scientists who forecast such periodic fluctuations.
The immediate cause of the unexpected rise has now been solved, U.S. officials say in a new report (hint: it wasn't global warming). But the underlying reason remains a mystery.
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