Browsing Atmospheric sciences by Title
Now showing items 99-118 of 217
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A Lagrangian Study of Southeast Pacific Boundary Layer Clouds
(2013-04-17)Low clouds lie at the heart of climate feedback uncertainties. The representation of clouds in global climate models relies on parameterization of many sub-grid scale processes that are crucial to understanding cloud ... -
Light-absorbing particulates in seasonal snow in western North America
Commonly found light-absorbing particulates (LAPs) in snow are black carbon (BC), organic carbon (OC), and mineral dust (MD). These LAPs can reduce the very high albedo of snowpack and trigger positive feedback processes, ... -
Linear and nonlinear aspects of the northern hemisphere wintertime variability in the 500 hPa height field
(1993)Low-frequency variability in the Northern Hemisphere wintertime 500 hPa height field has been investigated. The Pacific/North American pattern and the North Atlantic Oscillation stand out above the background continuum of ... -
Linking Soil Moisture and Summertime Surface Temperature Variability
(2014-02-24)Summertime temperature variability in the late 20th century simulations of the CMIP3 and CMIP5 climate models used in the IPCC assessments is much greater than the observed temperature variability -- particularly in the ... -
The local, remote, and global consequences of climate feedbacks
(2013-07-25)Climate feedbacks offer a powerful framework for revealing the energetic pathways by which the system adjusts to an imposed forcing, such as an increase in atmospheric CO<sub>2</sub>. We investigate how local atmospheric ... -
The location of tropical precipitation in idealized atmospheric general circulation models forced with Andes topography and surface heat fluxes
(2014-02-24)This aquaplanet modeling study examines how ocean heat transport (OHT) and topography influence the location of tropical precipitation. Two global atmospheric general circulation models from the GFDL hierarchy of models ... -
Long-range transport of Asian pollution to North America: mechanisms, chemistry and variability
(2006)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 ... -
Low frequency variability and mean circulation of the tropical stratosphere from UARS data
(1997)The low frequency variability in the equatorial middle atmosphere is dominated by the semiannual (SAO) and quasi-biennial (QBO) oscillations. Although the general characteristics and forcing mechanisms of these oscillations ... -
Markov model studies of the El Niño-Southern Oscillation
(1999)Aspects of the El Nino-Southern Oscillation are investigated using statistical models derived from observational data sets of surface and subsurface temperature in the tropical Pacific Ocean. Topics examined include: the ... -
Mesoscale Predictability and Error Growth in Short Range Ensemble Forecasts
(2013-11-14)Although it was originally suggested that small-scale, unresolved errors corrupt forecasts at all scales through an inverse error cascade, some authors have proposed that those mesoscale circulations resulting from stationary ... -
Mesoscale variability and drizzle in southeast Pacific stratocumulus
(2006)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 ... -
Microphysical Mechanisms in Stratiform Precipitation as Observed in OLYMPEX
This thesis presents results from a strong, rain-producing storm that passed over the Olympic Mountains during the 2015–16 Olympic Mountains Experiment (OLYMPEX). The microphysical characteristics of the stratiform component ... -
Microphysics and Southern Ocean Cloud Feedback
Global climate models (GCMs) change their cloud properties in the Southern Ocean (SO) with warming in a qualitatively consistent fashion. Cloud albedo increases in the mid-latitudes and cloud fraction decreases in the ... -
Model studies of the middle atmosphere of Venus
(1991)Zonal winds reach in excess of 100 m/s in the middle atmosphere of Venus; the cloud-level atmosphere takes little more than 4 days to complete one rotation, while the solid planet below has a 243-day rotation period. This ... -
A model study of natural variability in the Arctic climate
(1997)The arctic climate response to natural perturbations in the atmosphere is simulated with two numerical models. The first is a single-column, energy balance model of the atmosphere, sea ice, and upper-ocean system which I ... -
Modeling and observational constraints on tropospheric sulfur-halogen interactions
Sulfur and reactive halogens are key components in tropospheric chemistry and the radiation budget of the Earth. Tropospheric sulfur and halogen budgets are still not well constrained. Laboratory and modeling studies have ... -
A modeling study of self-aggregation and large-scale control of tropical deep convection
(1998)The nonhydrostatic version of the Penn State University (PSU)/National Center for Atmospheric Research (NCAR) mesoscale model MM5 is used to investigate the mechanisms responsible for the superclustering of tropical deep ... -
A modeling study of the subtropical stratocumulus-to-trade-cumulus transition
(1997)The transition from the subtropical stratocumulus-capped marine boundary layer to the trade-cumulus boundary layer is studied using numerical simulations. Model results are used to propose a new conceptual model of this ... -
A modeling study of thunderstorm electrification and lightning flash rate
(1997)Observing the range of spatial scales important in thunderstorm electrification and subsequent lightning development is huge and would be an impossible task. The charge transfer processes within clouds takes place during ... -
Modeling the thickness distribution of Arctic sea ice
(1998)Arctic sea ice may be unusually sensitive to greenhouse warming, thanks to ice-albedo feedback. Most climate models represent sea ice crudely, with each grid cell occupied by ice of uniform thickness together with open ...