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)
- Seriously @UNCims 70 years? So glad to have been part of the last 12. It’s just a number. about 14 hours ago from Twitter for iPhone ReplyRetweetFavorite
- RT @UNCims: Woo hoo - getting excited for our big community Open House. Join us Sat October 21 from 1-4 for an afternoon of family friendly… 02:21:14 AM October 11, 2017 from Twitter for iPad ReplyRetweetFavorite
- RT @nochedevolcanes: The 2006 Eruption of Augustine Volcano, #Alaska 🌋 Good read for #VolcanoMonday https://t.co/hDuiulcKqS #scicomm #geolo… 11:06:13 PM September 25, 2017 from Twitter for iPhone ReplyRetweetFavorite
Let’s share: Our first open-access article published.