Sea-level anomalies are periods greater than 2 weeks when the water level at the beach is high. They are not necessarily related to storm surge or sea-level rise, rather they are forced by changes in ocean currents. On the US East Coast, slowing of the Gulf Stream or meteorological phenomena, like northeasterly winds or pressure changes, can pile water up against the shore and cause a sea-level anomaly. They impact large stretches of coastline (e.g. Massachusetts to Florida) and occur every year, but some years they are more frequent. Ethan Theuerkauf recently published a paper in Geophysical Research Letters that presents the first direct measures of the effects of sea-level anomalies on beaches. He shows that a year with frequent sea-level anomalies can cause as much beach erosion as a year with a hurricane. Compare Onslow Beach, NC during a sea-level anomaly, above, with Hurricane Arthur (July 3, 2014), below. The hurricane made landfall at night, but you can still make out overwash (the camera is pointed landward across a washover fan).
3431 Arendell St.
Morehead City, NC
Lesson plans for middle- and high-school teachers that focus on estuarine fish habitats can be found here.
Lab Musings (mostly)
- Balloons of Lava Bubble into the Ocean from Seafloor Blisters https://t.co/EnVPnXWLFW about 21 hours ago from Twitter Web Client ReplyRetweetFavorite
- Accounting for Accelerated East Coast Sea Level Rise https://t.co/gKKjGHl9Wy about 21 hours ago from Twitter Web Client ReplyRetweetFavorite
- Of course oyster reefs (hard) impede marsh (soft) erosion, but they also preserve carbon-rich seds @jtridge https://t.co/K1S1zT7G0w 07:09:57 PM June 02, 2017 from Twitter Web Client ReplyRetweetFavorite
Let’s share: Our first open-access article published.