{"id":32022,"date":"2019-09-06T09:44:19","date_gmt":"2019-09-06T13:44:19","guid":{"rendered":"https:\/\/www.fondriest.com\/news\/?p=32022"},"modified":"2019-09-06T09:44:19","modified_gmt":"2019-09-06T13:44:19","slug":"tide-gauge-data-reveal-multiple-us-meteotsunamis-annually","status":"publish","type":"post","link":"https:\/\/www.fondriest.com\/news\/tide-gauge-data-reveal-multiple-us-meteotsunamis-annually.htm","title":{"rendered":"Tide Gauge Data Reveal Multiple US Meteotsunamis Annually"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Say the word \u201ctsunami\u201d and images of tremendous waves engulfing homes or masses of debris might come to mind. Those tsunamis that are triggered by massive landslides and earthquakes are in fact at that scale.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">But weather can trigger more localized \u201cmeteotsunamis\u201d as well, and <\/span><a href=\"https:\/\/journals.ametsoc.org\/doi\/full\/10.1175\/BAMS-D-18-0206.1\"><span style=\"font-weight: 400;\">new research<\/span><\/a><span style=\"font-weight: 400;\"> shows just how common these are along the East Coast of the United States.<\/span><a href=\"https:\/\/www.noaa.gov\/\"><span style=\"font-weight: 400;\"> National Oceanic and Atmospheric Administration (NOAA)<\/span><\/a><span style=\"font-weight: 400;\"> physical oceanographer<\/span><a href=\"https:\/\/www.researchgate.net\/profile\/Gregory_Dusek\"><span style=\"font-weight: 400;\"> Gregory Dusek<\/span><\/a><span style=\"font-weight: 400;\"> of the<\/span><a href=\"https:\/\/oceanservice.noaa.gov\/\"><span style=\"font-weight: 400;\"> National Ocean Service<\/span><\/a><span style=\"font-weight: 400;\"> in Silver Spring, Maryland, spoke with us about the work.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cThe public noticed the 2013 tsunami event, we did a report summarizing that event in our office, and we started wondering how frequently these actually occur,\u201d explains Dr. Dusek. \u201cAt that point, there really hadn&#8217;t been any significant work in the US looking at a long data record and trying to determine how often meteotsunamis happen.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">As the team that operates the<\/span><a href=\"https:\/\/oceanservice.noaa.gov\/facts\/tide-gauge.html\"><span style=\"font-weight: 400;\"> tide gauges<\/span><\/a><span style=\"font-weight: 400;\">, the<\/span><a href=\"https:\/\/oceanservice.noaa.gov\/navigation\/tidesandcurrents\/\"><span style=\"font-weight: 400;\"> tides and currents<\/span><\/a><span style=\"font-weight: 400;\"> office at NOAA is uniquely positioned to know what data is available in this area and how to best use it.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cInitially I think people generally thought meteotsunamis were quite rare, at least in the US,\u201d details Dr. Dusek. \u201cThere&#8217;s a lot of work in the Mediterranean, where they are perhaps a little more destructive and meteotsunamis are a little more common, but in the US I think people thought of these as rare events because the extreme ones don&#8217;t happen very frequently.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">In addition, the team noted that much of the previous literature focused primarily on which meteorological conditions tend to drive tsunamis. Thus, they worked to identify those meteorological conditions in the water level data to see if watching meteorological conditions is as predictive of meteotsunamis as we might hope.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Similar results, different coasts<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">At about the same time as Dr. Dusek&#8217;s team was working on this problem, other NOAA and academic colleagues working <\/span><a href=\"https:\/\/www.nature.com\/articles\/srep37832\"><span style=\"font-weight: 400;\">on the Great Lakes<\/span><\/a><span style=\"font-weight: 400;\"> and <\/span><a href=\"https:\/\/link.springer.com\/article\/10.1007\/s11069-017-2922-3\"><span style=\"font-weight: 400;\">in the Gulf of Mexico<\/span><\/a><span style=\"font-weight: 400;\"> published papers that reflected similar results.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cWe found that instead of watching meteorological data, we should be looking at the water level data for the signal we know to expect,\u201d Dr. Dusek describes. \u201cThen we can confirm whether the meteorological data supports what we&#8217;re seeing in the water level data. Approaching it that way makes the process much more efficient despite high amounts of data.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This is new information in part because until more recently, the data simply wasn&#8217;t available.<\/span><\/p>\n<div id=\"attachment_32025\" style=\"width: 610px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-32025\" class=\"size-large wp-image-32025\" src=\"https:\/\/www.fondriest.com\/news\/wp-content\/uploads\/2019\/09\/NOAA_meteo_Jacksonville-NWLON-600x450.jpg\" alt=\"tide gauge data\" width=\"600\" height=\"450\" srcset=\"https:\/\/news.fondriest.com\/wp-content\/uploads\/2019\/09\/NOAA_meteo_Jacksonville-NWLON-600x450.jpg 600w, https:\/\/news.fondriest.com\/wp-content\/uploads\/2019\/09\/NOAA_meteo_Jacksonville-NWLON-300x225.jpg 300w, https:\/\/news.fondriest.com\/wp-content\/uploads\/2019\/09\/NOAA_meteo_Jacksonville-NWLON-768x576.jpg 768w, https:\/\/news.fondriest.com\/wp-content\/uploads\/2019\/09\/NOAA_meteo_Jacksonville-NWLON.jpg 940w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><p id=\"caption-attachment-32025\" class=\"wp-caption-text\"><span style=\"color: #808080;\">Tide gauge at Jacksonville which shows a Microwave water level sensor near the water and a tower with the data collection platform and meteorological sensors in the background. (Credit: NOAA)<\/span><\/p><\/div>\n<p><span style=\"font-weight: 400;\">\u201cUntil 1996, our tide gauges didn&#8217;t retain six-minute water level data,\u201d states Dr. Dusek. \u201cPrior to that it was hourly water levels, and you can&#8217;t resolve a meteotsunami with a single data point every hour. There wasn&#8217;t an extensive data record to go on really until recently, but since we now have 23 years of data, now we can do the research.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">When the team first developed and tested the algorithm using the 2013 meteotsunami event, they already knew of one additional reported event from that year\u2014and were surprised to detect many more.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cWe knew we had two events that we needed to get right and detect, but when we first ran through the data we found many events in 2013,\u201d remarks Dr. Dusek. \u201cI didn&#8217;t expect to see that many. I can&#8217;t remember the precise number now but in the teens, I think. That was a surprise.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Once the researchers felt comfortable with how the algorithm was working, they applied it to the data from a greater number of years.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cI started seeing 20 to 30 events every year,\u201d comments Dr. Dusek. \u201cI thought wait, is that right? That seemed crazy, you know, that we&#8217;d see that many. We did extensive validation and sure enough, we&#8217;re seeing many events, but I think the catch is that the vast majority of them are quite small; unless you&#8217;re looking at the data you probably wouldn&#8217;t even know they&#8217;re happening.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The team believes that this is part of why these events don&#8217;t get reported.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cThey&#8217;re just in the background, for the most part, a lot of the smaller events under a foot or a foot and a half,\u201d Dr. Dusek says. \u201cThose kinds of events people probably aren&#8217;t going to notice. I think that&#8217;s why people hadn&#8217;t expected to see that many because they occur frequently, but they&#8217;re pretty small. It was a big surprise.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">After that initial work, other papers from the Great Lakes and the Gulf, both using the team&#8217;s water level data and general approach, saw similar results.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cSo it turns out these things happen frequently in all these places across the US, which confirmed what we were seeing,\u201d adds Dr. Dusek.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Warning of meteotsunami hazards<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A major takeaway from this research is that about once a year, on average, there is an event that reaches the impactful category, over two feet.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cIn any particular location those are a little more rare; if you&#8217;re just at one location on the east coast you might go five years before you see an event that large, but as a whole, up and down the east coast, about once per year you have one of those larger events,\u201d explains Dr. Dusek. \u201cLarge ones might not be occurring frequently, but they&#8217;re occurring frequently enough that we want to make sure we better understand why they&#8217;re happening and better provide warnings if we need to.\u201d<\/span><\/p>\n<div id=\"attachment_32026\" style=\"width: 610px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-32026\" class=\"size-large wp-image-32026\" src=\"https:\/\/www.fondriest.com\/news\/wp-content\/uploads\/2019\/09\/NOAA_meteo_NewLondon-1-600x400.jpg\" alt=\"tide gauge data\" width=\"600\" height=\"400\" srcset=\"https:\/\/news.fondriest.com\/wp-content\/uploads\/2019\/09\/NOAA_meteo_NewLondon-1-600x400.jpg 600w, https:\/\/news.fondriest.com\/wp-content\/uploads\/2019\/09\/NOAA_meteo_NewLondon-1-300x200.jpg 300w, https:\/\/news.fondriest.com\/wp-content\/uploads\/2019\/09\/NOAA_meteo_NewLondon-1-768x512.jpg 768w, https:\/\/news.fondriest.com\/wp-content\/uploads\/2019\/09\/NOAA_meteo_NewLondon-1.jpg 940w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><p id=\"caption-attachment-32026\" class=\"wp-caption-text\"><span style=\"color: #808080;\">Tide gauge at New London, CT which shows the same type of Microwave water level sensor on the right, and an acoustic water level sensor on the left. These two types of sensors were the ones primarily used to collect the water level data used for this research. (Credit: NOAA)<\/span><\/p><\/div>\n<p><span style=\"font-weight: 400;\">The team&#8217;s goal became determining exactly which meteorological conditions lead to meteotsunamis, and to start by detecting them at all.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cWe aimed to associate meteotsunamis and whichever their concurrent meteorological conditions might be,\u201d details Dr. Dusek. \u201cWe could then develop a better research strategy for unraveling why specific conditions lead to meteotsunamis more often. You need to know how often they&#8217;re occurring as a starting point, to then move on to when and where, and finally, better let people know when to be worried about them or when they might cause impact.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">That&#8217;s one of the next tasks for the team: actually employing the algorithm they wrote to warn people in time to save them from harm.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cThere&#8217;s a bit of lag because you have to have enough data before you can establish that you see a wave, so it wouldn&#8217;t necessarily give you warning before it&#8217;s arrived on shore,\u201d Dr. Dusek describes. \u201cIt might at least give people some notice away from the initial location, though.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For example, in 2013 the tsunami arrived in New Jersey first, but then several hours passed before it arrived further south along the coast.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cOne possibility is trying to implement our approach in a real-time manner to give people additional information in situations like that,\u201d adds Dr. Dusek. \u201cThat&#8217;s something the National Weather Service is interested in. The NWS houses the tsunami warning center notification network for seismic tsunamis. In the ocean service here at NOAA, we&#8217;re exploring whether we can treat these similarly, notifying people right away that there potentially could be a hazard when we detect something somewhere that looks like an event. That&#8217;s one thing we&#8217;re going to be working on.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The NOAA team will also be exploring the possibility of applying other types of instrumentation such as high-frequency radar to the problem.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cNOAA helps fund all these radar systems all along the US coast, but also up and down the East Coast, which are predominantly for looking at surface currents,\u201d remarks Dr. Dusek. \u201cThey can also detect meteotsunamis because they&#8217;re looking at the surface of the ocean. Now that we have this catalog of events, we can better pinpoint how well those systems are picking up the events, and we may also see additional information that could potentially be coupled with the tide gauge data.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Another future point for research: the connections between summer storms and meteotsunamis.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cA result of the modeling that we found that I wasn&#8217;t expecting going into this was that meteotsunamis happen during nor&#8217;easters and tropical storms,\u201d comments Dr. Dusek. \u201cIn those cases, because there is a storm surge, large waves, and other hazards, from an on-the-ground impact, perspective meteotsunamis might not seem like the biggest priority.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">However, an extra meter or so of water atop storm surge can worsen flooding and inundation.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cWe discussed modeling some of these specific events to better understand why they are occurring during tropical storms or nor&#8217;easters, and whether we can parse out how much they might contribute to inundation,\u201d Dr. Dusek says. \u201cIs this something we need to be concerned about in some cases with those types of events? That&#8217;s something else we&#8217;re looking into with some of our partners.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Right now, the team is prioritizing warning people and a better understanding of whether meteorological conditions are involved.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u201cParticularly in the summer months, where summer storms and Derechos <\/span><i><span style=\"font-weight: 400;\">tend<\/span><\/i><span style=\"font-weight: 400;\"> to lead to meteotsunamis, the question is, do these meteorological conditions <\/span><i><span style=\"font-weight: 400;\">always<\/span><\/i><span style=\"font-weight: 400;\"> lead to meteotsunamis? Dr. Dusek queries. \u201cAnd what is the threshold, so when the weather service sees these specific conditions they can be ready.\u201d<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>NOAA researchers have used years of tide gauge data to reveal that meteotsunamis arrive on US shores with surprising frequency.<\/p>\n","protected":false},"author":31,"featured_media":32024,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,5,8,44],"tags":[1939,60,1937,1933,393,109,74,1934,1938,1940,1935,1936],"class_list":["post-32022","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-earth-atmosphere","category-featured-articles","category-newsfeed","category-oceans-coasts","tag-derechos","tag-featured","tag-gregory-dusek","tag-meteotsunamis","tag-national-ocean-service","tag-news-ticker","tag-noaa","tag-nws","tag-storm-events","tag-tide-gauge-data","tag-tide-gauges","tag-tides-and-currents"],"remote_post_permalink":false,"remote_post_featured_image":false,"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Tide Gauge Data Reveal Multiple US Meteotsunamis Annually<\/title>\n<meta name=\"description\" content=\"NOAA researchers have used years of tide gauge data to reveal that meteotsunamis arrive on US shores with surprising frequency.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.fondriest.com\/news\/tide-gauge-data-reveal-multiple-us-meteotsunamis-annually.htm\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tide Gauge Data Reveal Multiple US Meteotsunamis Annually\" \/>\n<meta property=\"og:description\" content=\"NOAA researchers have used years of tide gauge data to reveal that meteotsunamis arrive on US shores with surprising frequency.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.fondriest.com\/news\/tide-gauge-data-reveal-multiple-us-meteotsunamis-annually.htm\" \/>\n<meta property=\"og:site_name\" content=\"Environmental Monitor\" \/>\n<meta property=\"article:published_time\" content=\"2019-09-06T13:44:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.fondriest.com\/news\/wp-content\/uploads\/2019\/09\/NOAA_meteo_June_13_Derecho.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"940\" \/>\n\t<meta property=\"og:image:height\" content=\"702\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Karla Lant\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Karla Lant\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.fondriest.com\\\/news\\\/tide-gauge-data-reveal-multiple-us-meteotsunamis-annually.htm#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.fondriest.com\\\/news\\\/tide-gauge-data-reveal-multiple-us-meteotsunamis-annually.htm\"},\"author\":{\"name\":\"Karla Lant\",\"@id\":\"https:\\\/\\\/www.fondriest.com\\\/news\\\/#\\\/schema\\\/person\\\/51170f7bfa3a05b94cea6f517ce4e79b\"},\"headline\":\"Tide Gauge Data Reveal Multiple US Meteotsunamis Annually\",\"datePublished\":\"2019-09-06T13:44:19+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.fondriest.com\\\/news\\\/tide-gauge-data-reveal-multiple-us-meteotsunamis-annually.htm\"},\"wordCount\":1615,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/www.fondriest.com\\\/news\\\/tide-gauge-data-reveal-multiple-us-meteotsunamis-annually.htm#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/news.fondriest.com\\\/wp-content\\\/uploads\\\/2019\\\/09\\\/NOAA_meteo_June_13_Derecho.jpg\",\"keywords\":[\"Derechos\",\"featured\",\"Gregory Dusek\",\"Meteotsunamis\",\"National Ocean Service\",\"news ticker\",\"NOAA\",\"NWS\",\"storm events\",\"Tide Gauge Data\",\"tide gauges\",\"tides and currents\"],\"articleSection\":[\"Earth &amp; 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