05-02 . National Oceanic and Atmospheric Administration, Center for Operational Oceanographic Products and Services. So, in Madison, Lake Monona has 3,274 acres of surface area. Storm surges occur on ocean coasts as well as on Great Lakes coasts. As a record of wave motion in a lake, they can reveal when a lake freezes over and when it thaws. Within the global hydrologic cycle, freshwater lakes constitute only about 0.009 percent of all free water, which amounts to less than 0.4 percent of all continental fresh water. WHAT CAUSES FOAM IN STREAMS AND LAKES? The large expanse of the lakes allows waves to build to substantial heights and the open water can alter weather systems (fog, lake effect snow). And that’s how deep the water is. Seiches are typically caused when strong winds and rapid changes in atmospheric pressure push water from one end of a body of water to the other. Seiches are usually limited to partially or fully enclosed basins, such as Lake Erie. Seismic waves travel through different geological materials at different speeds, so observing how waves change as they emanate from a source can reveal subsurface geology. While limnology is the study of inland waters, our expertise doesn’t technically extend to the physics of waves, so we couldn’t find an in-house scientist to tackle this one. In 1844, a 22-foot seiche breached a 14-foot-high sea wall killing 78 people and damming the ice to the extent that Niagara Falls temporarily stopped flowing. Microseisms can perform another function, says Aini Mokhdhari, a senior majoring in geology. First off, the answer to your question is “Yes and No.” Weird, right? They’ll place an array of small seismometers called geophones around the perimeter of the lake, and also place an array of special waterproof seismometers on the lake floor. Mobile: 801-505-8253 paul.gabrielsen@utah.edu, UNIVERSITY OF UTAH PUBLIC RELATIONS Thus, rather than relying on satellite or eyewitness observations, lake freezing and thawing could be monitored by an autonomous seismometer. Find out how they contribute to transport, erosion and deposition. SALT LAKE CITY, UTAH 84113 Rogue waves are an open water phenomenon, in which winds, currents, non-linear phenomena such as solitons, and other circumstances cause a wave to briefly form that is far larger than the "average" large occurring wave (the significant wave height or "SWH") of that time and place. Next week’s big question: Logan, a 4th grader from Arbor Vitae, Wisconsin has a question about water snakes. “We compare the data we got from the seismograph to see if it’s the same,” she says. Lake Pontchartrain, Louisiana, is also known to routinely form small seiches after the passage of afternoon squall lines during summer months. Feedback, questions or accessibility issues: hinterthuer@wisc.edu. What's the difference? It’s surface area is more than three times the size of Lake Monona at 9,847 acres and it can get some pretty impressive waves. But taking the plunge in lakes and quarries is extremely dangerous, for r… Thanks for your question. Seiches and meteotsunamis. Seiches and meteotsunamis are often grouped together, but they are two different events. If you have observed water sloshing back and forth in a swimming pool, bathtub, or cup of water, you may have witnessed a small-scale seiche (pronounced saysh). On a much grander scale, the same phenomenon occurs in large bodies of water such as bays and lakes. A “big” wave on Lake Mendota might be 3 feet high, but, during a storm on Oct. 24, 2017, a buoy in Lake Superior recorded 29-foot high waves north of Marquette, Michigan! 75 Fort Douglas Blvd Meteotsunamis can occur in such basins but are … and has an average depth of 483 feet. But, if you think the waves get big on Lake Monona, you should ride your bike across the isthmus on a windy day to see what’s going on on Lake Mendota.
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