KMI - Dispersion

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centre), within the context of the <a href="https://www.ctbto.org/">CTBTO</a>.</p> <p>This service is also focussing on the validation of atmospheric trace gases, retrieved by satellites within the framework of the <a href="https://acsaf.org" target="_blank">AC SAF</a>.</p> </div> <div class="text-pp"> <p>The consequenses, related to the volcanic eruption of the Eyjafjallajökull, were a major incentive for the meteorological- and other scientific communities to improve their operational products related to these types of events.</p> <p>At the RMI, we have set up a strategy to improve our knowledge on aerosols, observed from the surface by setting up a <a href="/instruments-and-observation-techniques/lidar-ceilometer" target="_blank">LIDAR network</a>. One of the major problems during this event was the lack of knowledge on the observation of the vertical distribution of aerosols in the atmosphere. Since the installation of our operational LIDAR network, we have the possibility to observe aerosols in the atmosphere.</p> <p>RMI is also responsible for the calculation of dispersion of suspended nuclear particles. Therefore we have an operational dispersion model at our disposal, which calculates for several hotspots on a daily basis precalculated dispersion maps. We can use the dispersion model also for other types of aerosols and trace gases (e.g.  SO2, see Fig. 1)).</p> <p>In the weather office, the forecasters can start an "on-demand" dispersion modelling forecast which can be calculated for every location, located on the Northern Hemispere. We can provide a forecast with a lead time of 72 hours.</p> <p>On 22/09/2014, our <a href="/instruments-and-observation-techniques/spectrophotometers/the-brewer-spectrophotometers" target="_blank">Brewer spectrofotometer</a> observed a total column of 7 DU of SO2. This was nicely forecasted by our dispersion model (Figure 1).</p> </div> <figure class="image-pp"> <img src="https://ozone.meteo.be/uploads/media/5fc762bec81b3/2014082000-so2-iceland.gif?v20241107-0827" loading="lazy" decoding="async" /> <div class="container"> <figcaption> <p>Example of a dispersion simulation for the Bardarbunga volcano (20/09/2014)</p> </figcaption> </div> </figure> <h3 id="period"> Period </h3> <h3 id="contact"> Contact </h3> <div class="text-pp"> <p><a href="mailto:Andy.Delcloo.ad.meteo.be?subject=dispersion%20-%20website">Andy Delcloo</a><br /> Royal Meteorological Institute of Belgium<br /> Ringlaan 3<br /> B-1180 Uccle</p> </div> <p class="totop-pp"><a href="#">Top</a></p> </div> </div> <div class="col-md-12 visible-xs visible-sm"> <h2 class="subpage__content__read-more"> Read more </h2> <div class="box"> <nav class="sidebar-nav"> <h3 class="sidebar-nav__title"> Projects </h3> <ul class="sidebar-nav__list"> <li id="subnav-57471" class="sidebar-nav__list__item 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