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<!DOCTYPE html>
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<title>Brian Blaylock, MS</title>
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<h1 align="center">
<i class="fa fa-graduation-cap fa-fw"></i> Master of Science 2016</h1>
<h2 align="center">Impact of a Lake Breeze on Summer Ozone<br>Concentration in the Salt Lake Valley</h2>
<hr>
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<ul class="nav nav-tabs">
<li class="active"><a data-toggle="tab" href="#tab1">Abstract</a></li>
<li><a data-toggle="tab" href="#tab2">Thesis</a></li>
<li><a data-toggle="tab" href="#tab3">Defense</a></li>
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<img align=right src="./images/seagull_logo_transparent.png" width="250px" style="padding:10px">
<p>During the late afternoon of 18 June 2015, ozone concentrations
within a strong lake breeze arising from the Great Salt Lake in
northern Utah were observed to be ~20 ppb higher than those in
its advance. Ozone observations from an enhanced network were
available from state air quality measurement sites, additional
fixed locations, and mobile platforms, including a news helicopter.
The southward progression of the well-defined lake-breeze front
through the Salt Lake Valley was observed by wind, temperature,
and moisture observations available at automated weather stations,
as well as radial velocity scans from a nearby Terminal Doppler
Weather Radar. Strong flow opposing the lake breeze increased
convergent frontogenesis and delayed the onset of its passage
through the Salt Lake Valley. Ozone concentrations were exceptionally
high aloft in the head of the lake-breeze front.
<p>The development and progression of lake breezes on both 17 and 18
June 2015 were simulated using the Weather Research and Forecast
model at 1-km horizontal resolution over northern Utah. The model
was initialized at 0000 UTC 14 June 2015 using hourly analyses
at 3-km resolution from the High Resolution Rapid Refresh model.
The underlying surface state was improved by specifying the
areal extent and surface temperature of the lake observed during
June 2015. An urban canopy parameterization was added as well
to better simulate urban effects on wind and heat fluxes.
These modifications improved the model simulation particularly
for the more typical lake
breeze event on 17 June. However, on 18 June weaker than observed
opposing southerly flow allowed the development of the simulated
lake-breeze front to occur too early and its subsequent speed up
the valley was too fast. Continuous passive tracers initialized at
the surface within and ahead of the lake breeze highlight the dispersion
and transport of pollutants arising from the strong lake-breeze front
on 18 June. Tracers within the lake breeze are confined closer to
the surface while tracers in advance of the front are lofted vertically
over it.
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<p><a href="https://1drv.ms/w/s!AtJL0JL_rT9jragSy5T5Bq9kcC4e8A" target="_blank">Full Thesis <i class="fa fa-file-word fa-fw"></i></a>
<a href=http://journals.ametsoc.org/doi/abs/10.1175/JAMC-D-16-0216.1 target="_blank">AMS Article <i class="fa fa-book fa-fw"></i></a>
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<br>
<p> <a href="./images/thesis_anouncement.jpg" target="_blank"><i class="fa fa-bullhorn fa-fw"></i> Defense Announcment</a>
<a href="https://www.youtube.com/watch?v=r85YC8ekD9s" target="_blank"><i class="fa fa-film fa-fw"></i> Pre-Defense Video</a>
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