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Defenses Spring 2015

Fall 2014 | Fall 2015

Wake Vortices and Tropical Cyclogenesis Downstream of Sumatra over the Indian Ocean

Caitlin Fine
June 26, 2015

A myriad of processes acting singly or in concert may contribute to tropical cyclogenesis, including convectively coupled waves, breakdown of the inter-tropical convergence zone (ITCZ), or upper level troughs. This thesis investigates th...

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Uncertainties in Global Aerosols and Climate Effects due to Biofuel Emissions

Jack Kodros
May 14, 2015

Prevalent combustion of biofuel as a source of energy for domestic tasks emits large quantities of black carbon and organic aerosol, causing potentially large impacts to air quality and climate. While reducing aerosol emissions through i...

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Cumulus Moistening, The Diurnal Cycle, and Large-Scale Tropical Dynamics

James Ruppert
May 8, 2015

Observations and modeling techniques are employed to diagnose the importance of the diurnal cycle in large-scale tropical climate. In the first part of the study, soundings, radar, and surface flux measurements collected in the Indian O...

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TOWARD AN IMPROVED UNDERSTANDING OF THE SYNOPTIC AND MESOSCALE DYNAMICS GOVERNING NOCTURNAL HEAVY-RAIN-PRODUCING MESOCALE CONVECTIVE SYSTEMS

John Peters
April 21, 2015

In the first stage of this research, rotated principal component analysis was applied to the atmospheric fields associated with a large sample of heavy-rain-producing mesoscale convective systems (MCSs) that exhibited the training-line a...

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Time-Filtered Inverse Modeling of Land-Atmosphere Carbon Exchange

Nick Geyer
April 3, 2015

The locations and changes of biospheric carbon dioxide sources and sinks represents one of the least understood processes regarding carbon science. The diagnosis of these sources and sinks come from carbon inversion models, which employ ...

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On the Observed Relationships Between Variability in Sea Surface Temperatures and the Atmospheric Circulation in the Northern Hemisphere

Samantha Wills
April 3, 2015

The advent of increasingly high-resolution satellite observations and numerical models has led to a series of advances in our understanding of the role of midlatitude sea surface temperature (SST) in climate variability, especially near ...

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Tropical Tropopause Layer Variability Associated with the Madden-Julian Oscillation during DYNAMO

Erin Dagg
March 27, 2015

As the transition region between the troposphere and stratosphere, the tropical tropopause layer (TTL) has importance as the gateway to the stratosphere for atmospheric tracers such as water vapor. This has implications for Earth’s ra...

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The Spatial and Temporal Properties of Precipitation Uncertainty Structures over Tropical Oceans

Jianbo Liu
March 13, 2015

The global distribution of precipitation has been measured from space using a series of passive microwave radiometers for over 40 years. However, our knowledge of precipitation uncertainty is still limited. While previous studies have sh...

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