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Defenses Fall 2015

Spring 2015 | Spring 2016

A Comparison of Observed and Modeled Inter-Annual Variability and Trends in Cloud Liquid Water Pah

Andrew Manaster
December 10, 2015

Long-term satellite records of changes in cloud properties have only been available for the past several decades and have just recently been used to help diagnose cloud-climate feedbacks. However, due to issues with satellite drift, cal...

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OBSERVATIONS OF ACYL PEROXY NITRATES DURING THE FRONT RANGE AIR POLLUTION AND PHOTOCHEMISTRY ÉXPERIMENT (FRAPPÉ)

Jake Zaragoza
December 9, 2015

The Colorado Front Range is an ozone (O3) nonattainment region. The photochemistry of the region is influenced by emissions from the urban sector, the oil and gas sector, the complex terrain and the meteorology. The Front Rang...

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Tropical Warm Pool Rainfall Variability and Impact on Ocean Mixed Layer Depth throughout the MJO

Elizabeth Thompson
December 9, 2015

Heating and rain freshening often stabilize the upper tropical ocean, bringing the ocean mixed layer depth to the sea surface. These thin mixed layer depths concentrate subsequent fluxes of heat, momentum, and freshwater into a thin laye...

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Using Convection-Allowing Ensembles to Understand the Predictability of Extreme Rainfall

Erik Nielsen
November 23, 2015

The meteorological community has well established the usefulness of ensemble-based numerical weather prediction for precipitation guidance, since trusting one possible atmospheric solution can lead to, in some cases, particularly bad for...

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The Simultaneous Influence of Thermodynamics and Aerosols on Deep Convection and Lightning

Doug Stolz
November 20, 2015

The dissertation consists of a multi-scale investigation of the relative contributions of thermodynamics and aerosols to the observed variability of deep convective clouds in the Tropics. First, estimates of thermodynamic quantities and...

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The Response of a Simulated Mesoscale Convective System to Increased Aerosol Pollution

Michal Clavner
November 19, 2015

Mesoscale Convective Systems (MCS) are important contributors to rainfall in the High Plains of the United States as well as producers of severe weather such as hail, tornados and straight-line wind events known as derechos. It is theref...

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Examination of the Potential Impacts of Dust and Pollution Aerosol Acting as Cloud Nucleating Aerosol on Water Resources in the Colorado River Basin

Vandana Jha
November 18, 2015

The Southwest United States has huge demands on water resources. The Colorado River Basin (CRB) covers the states of Colorado, Wyoming, Utah, Nevada, Arizona, New Mexico, and California as well as Mexico and serves 27 million people. The...

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Model Post-Processing for the Extremes: Improving Forecasts of Locally Extreme Rainfall

Greg Herman
November 16, 2015

This study investigates the science of forecasting locally extreme precipitation events over the contiguous United States from a fixed-frequency perspective, as opposed to the traditionally applied fixed-quantity forecasting perspective....

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Exploring Post-Cold Frontal Moisture Transport in an Idealized Extratropical Cyclone Study

Amanda Sheffield
November 10, 2015

Moisture transport in extratropical cyclones (ETCs) has been studied in the past in the context of the warm conveyor belt (WCB), a 'conveyor belt' transferring moisture from the warm sector boundary layer to the free troposphere both eas...

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A Theoretical and Numerical Investigation of Warm-Phase Microphysical Processes

Adele Igel
October 29, 2015

Several studies examining microphysical processes are conducted with an emphasis on further understanding warm-phase processes, particularly condensation. In general, these studies progress from simple to complex representations of micro...

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Seasonal Sensitivity of the Eddy-Driven Jet to Tropospheric Heating in an Idealized Atmospheric General Circulation Model

Marie McGraw
October 28, 2015

A dry dynamical core is used to investigate the seasonal sensitivity of the circulation to two idealized thermal forcings: a tropical upper tropospheric forcing, and a polar lower tropospheric forcing. The circulation is modified using a...

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Initiation and Intensification of East Pacific Easterly Waves

Adam Rydbeck
October 14, 2015

The background atmospheric state of the east Pacific (EPAC) warm pool in which easterly waves (EWs) develop varies dramatically on intraseasonal time scales. EPAC intraseasonal variability is well known to modulate local convective and c...

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