Now showing items 1-5 of 5
The nature of adjoint sensitivities with respect to model parameters and their use in adaptive data assimilation
The predictability of the atmosphere depends, in part, on the accuracy of the initial states of numerical weather prediction models. Adjoints of numerical weather prediction models are used to produce initial condition sensitivities of some chosen forecast metric, quantifying such predictability. Previous studies investigating ...
Processes controlling the mean tropical Pacific precipitation pattern
In this dissertation, mechanisms responsible for the climatological large-scale distribution of precipitation in the tropical Pacific are addressed, in particular the Intertropical Convergence Zone (ITCZ) and the South Pacific Convergence Zone (SPCZ). This study is performed using numerical experiments with idealized ...
Long-range transport of Asian pollution to North America: mechanisms, chemistry and variability
Long-range transport (LRT) of Asian pollutants affects the atmospheric composition over the North Pacific and has important implications in terms of air quality regulation in the United States. Through analysis of surface and aircraft observations with a global model of tropospheric chemistry, this dissertation investigates ...
The thermodynamic and kinetic impacts of organics on marine aerosols
Organics can change the manner in which aerosols scatter radiation directly as hydrated aerosols and indirectly as in-cloud activated aerosols, through changing the solution activity, the surface tension, and the accommodation coefficient of the hydrated aerosol. This work explores the kinetic and thermodynamic impacts of the ...
Mesoscale variability and drizzle in southeast Pacific stratocumulus
Large regions of subtropical stratocumulus clouds are responsible for significant net cooling in the earth's radiative budget. Stratocumulus are maintained by a complex interaction of processes on small scales (turbulent eddies) and mesoscales (10-100 km) that are not currently well represented in climate models. In ...