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\begin{document}
\title{OBSERVATIONS OF COLD FRONT FEATURES AT HIGH SPATIOTEMPORAL RESOLUTION USING THE ATMOSPHERIC IMAGING RADAR}
\author{WILLIAM ANDREW MAHRE}
\depositdate{2016}
\majorfield{SCHOOL OF METEOROLOGY}
\memberone{Dr. Robert D. Palmer, Co-Chair}
\membertwo{Dr. Tian-You Yu, Co-Chair}
\memberthree{Dr. Phillip Chilson}
%%%%
\begin{preface}
\prefacesection{Acknowledgements}
%must leave a blank line next to avoid bug:
\par First, I would like to acknowledge my advisors, Dr. Robert Palmer and Dr. Tian-You Yu for their support and for their
helpful advice through every stage of this project. I would also like to acknowledge the assistance of Feng Nai and Dr. Jim Kurdzo, for
teaching me how to operate and troubleshoot the Atmospheric Imaging Radar and for teaching me how to process the data.
This project would not have been possible without their assistance and tireless work on the AIR and data processing scripts.
Additionally, plotting and visualization scripts and advice by Dr. Boon-Leng Cheong have been invaluable in creating various plots within this thesis,
as well as input from Dr. Phil Chilson.
Also, I would like to acknowledge the ARRC technical staff for maintaining the AIR and helping to troubleshoot issues.

Additionally, I would like to thank my parents, Peter Mahre and Valerie Mahre, for always supporting me 
from a young age. Finally, I would like to thank my wife Kimberlee for her unwavering support,
for moving with me to Norman so I could pursue this degree, and for putting up with the long hours I've spent studying and
working on my research. I couldn't have done this without her support (and the support of Minka, our 9-month-old puppy).

This project was supported by NOAA/Oceanic and Atmospheric Research under NOAA-University of Oklahoma Cooperative Agreement~\#NA11OAR4320072, U.S. Department of Commerce.

\tableofcontents[Table of Contents]
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\prefacesection{Abstract}
\par Over the past 40+ years, cold front vertical structure has been studied for the
purpose of increased understanding of convection initiation and aviation safety. Traditional
scanning radars tend to not be well-suited for observing small-scale features due to low
spatial resolution and slow volume coverage patterns (VCPs). While some
previous studies have achieved high spatial or temporal resolution, this study is unique in that
cold front vertical structure is observed at both high spatial and temporal resolution without
any mechanical movement using the Atmospheric Imaging Radar (AIR). This mobile,
X-band, phased array radar offers relatively high spatial (0.5~degree in elevation, 30~m in
range) and temporal (300~ms) resolution while in range-height indicator (RHI) scanning mode.
Because the AIR is an imaging radar, electromagnetic energy is transmitted in a wide fan
beam pattern in elevation, allowing for use of digital beamforming to create simultaneous receive beams. This offers an additional advantage over traditional, pencil-beam radars:
because all receive beams are simultaneous, differential vertical advection can be distinguished from
temporal evolution. The ability of the AIR to obtain these simultaneous RHIs without
any mechanical movement allows for unique analysis of cold front structure which
would otherwise be difficult or impossible. Features such as Kelvin-Helmholtz Instabilities,
low-level mass transport (referred to as feeder flow), transverse jet oscillations, and regions
of heightened spectrum width will be analyzed and discussed in this study, which aims to
improve understanding of small-scale, rapidly evolving features behind the leading edge of a cold front.
\end{preface}

\chapter{Introduction and Background}
\label{Intro}
\input{MahreIntroduction01}
\chapter{Fundamentals of Weather Radar}
\label{Radar}
\input{MahreRadar01}
\chapter{Atmospheric Imaging Radar}
\label{AIR}
\input{MahreAIR01}
\chapter{A Case Study of a 19 September 2015 Cold Front}
\label{Findings}
\input{MahreFindings01}
\chapter{Analysis of Findings}
\label{Analysis}
\input{MahreAnalysis01}
\chapter{Conclusions and Future Work}
\label{Conclusions}
\input{MahreConclusions01}

\newpage
\references[Bibliography]{amermeteorsoc}{/Volumes/MahreExt/Thesis/MahreReferences}

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\end{document}
