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Dear all,
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<div class="">Please join us next <b class="">Thursday October 19</b> for a Meteorology seminar, given by Prof. Bradford Johnson of FSU’s Department of Geography. He will speak about “<i class="">Getting Particular about Urban Precipitation Enhancement”.
</i>(Abstract below). </div>
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<div class="">Prof. Johnson will be joining us in person in 1044. <b class="">If you are interested in meeting with the speaker, please contact Allison Wing (<a href="mailto:awing@fsu.edu" class="">awing@fsu.edu</a>).
</b>He is available on Thursday afternoon before the seminar. </div>
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<div class="">**Graduate students, there will be a free lunch with the speaker at 12:30 PM; please contact Allison Wing to sign up.**</div>
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<div class=""><b class="">DATE:</b> Thursday October 19<br class="">
<b class="">SEMINAR TIME:</b> Refreshments at 3 PM, Talk 3:15 PM - 4:15 PM. <br class="">
<b class="">SEMINAR LOCATION:</b> EOA 1044 (Speaker in person)<br class="">
<b class="">SPEAKER: </b>Prof. Bradford Johnson<br class="">
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<b class="">TITLE: </b><i class="">Getting Particular about Urban Precipitation Enhancement</i><i class=""><br class="">
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<b class="">ABSTRACT: </b>The relationship between the growth of urbanization, the surrounding natural environment, and the corresponding atmospheric response has been studied extensively. Through the replacement of forests, agricultural lands, and other natural
land cover with impervious surfaces such as roads, buildings, and supporting infrastructure, several environmental changes can be observed. The combination of unnatural surfaces, commercial and industrial activities, increased emissions from anthropogenic
heating and cooling, and decreased evapotranspiration leads to discontinuities in the surface energy budget. This often results in retention of heat in urban areas compared to surrounding rural areas, giving rise to the urban heat island (UHI). Increased surface
roughness via the urban form and the UHI alter precipitation distribution and intensity through increased surface-based mechanical and thermal buoyancy, respectively. </div>
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<div class="">Urban precipitation research methods often fall into two broad categories – numerical simulations and climatological studies. High-resolution numerical models, such as the Weather Research and Forecasting model, are deployed to assess dynamic
response to land cover change via case study or seasonal simulations at urban-resolving spatial resolutions of less than or equal to 3km. Climatological approaches leverage a combination of in situ, radar, satellite-borne, and rain gauge products to characterize
urban precipitation distribution from historical observing networks. Efforts to translate the knowledge of urban precipitation modification to actionable science have had mixed results. The information needed by end users can vary according to the task or
application. The current body of research has identified preferred regions of enhanced rainfall – over and downwind of the city center – however, these generalizations are not optimal for operational use. The identification of precipitation hotspots (or areas
where heavier and/or more frequent precipitation are observed relative to neighboring subregions) would provide actionable information toward numerous decision-making processes. </div>
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<div class="">Through both climatological and modeling methods, an investigation of urban precipitation hotspots is conducted. This talk highlights a climatological approach and poses a couple of questions: </div>
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<div class="">1) What areas within cities have higher convective precipitation compared to city wide observations?</div>
<div class="">2) What are the antecedent atmospheric conditions during extreme, isolated precipitation events? </div>
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Allison Wing, Ph.D.<br class="">
Werner A. and Shirley B. Baum Professor<br class="">
Associate Professor, Department of Earth, Ocean and Atmospheric Science<br class="">
Florida State University<br class="">
<a href="mailto:awing@fsu.edu" class="">awing@fsu.edu</a></div>
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