Natural Science

Volume 12, Issue 5 (May 2020)

ISSN Print: 2150-4091   ISSN Online: 2150-4105

Google-based Impact Factor: 2.33  Citations  h5-index & Ranking

Rip Currents Have Least Friction

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DOI: 10.4236/ns.2020.125025    241 Downloads   514 Views  


Surface gravity waves continually come to the beach but rarely go back to sea. They bring excess mass to shore which must be returned offshore. Rip currents do that job because there is less overall friction in the nearshore region than there is in the only other imagined circulation, a two-layer scheme, which has in fact never been seen. An argument is presented to support this proposal. If correct, rip currents join a group of geophysical flow phenomena that persist, probably because there is zero friction associated with them, which include surface gravity waves, tornadoes and hurricanes, individually promoted recently.

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Kenyon, K. (2020) Rip Currents Have Least Friction. Natural Science, 12, 292-294. doi: 10.4236/ns.2020.125025.

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