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Browsing Atmospheric sciences by Title
Now showing items 72-91 of 315
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An empirical study of the lidar ratio and its variability, with implications for determining climate forcing by satellite-borne lidar
(2001)It is well-established that atmospheric aerosols play a role in determining the radiative balance of the Earth. Further, it is believed that anthropogenic aerosols may be causing significant cooling at the Earth's surface ... -
Empirically Derived Sensitivity of Vegetation to Climate Across the Globe
To predict the response of vegetation to climate change, we must understand the physiological processes controlling productivity across large spatial scales, encompassing global climate space. To date there is not a fully ... -
The Energetic Constraints on the Zonal Mean Atmospheric Circulations in the Tropics, Midlatitudes, and High Latitudes
(2013-07-25)In this doctoral thesis, I have studied the processes that affect the atmospheric energy budget and their coupling relationships with atmospheric circulations. The equator-to-pole radiation gradient at the top of the ... -
Energy and Moisture Transport in the Earth Climate System: Mean State and the Perturbation Response
Four studies are presented which investigate how energy and moisture transport define the mean state of the Earth Climate System and its response to perturbations. In the first study, we use a global climate model to study ... -
An Ensemble Numerical Modeling Study of Alantic Basin Hurricane Intensification
(2014-04-30)Rapid intensification of tropical cyclones is an active area of research in the atmospheric sciences due to the difficulty of forecasting cyclone intensity and the unclear mechanism by which a hurricane my undergo explosive ... -
ENSO-related marine cloud variation and new single column marine boundary layer cloud modeling
(2002)Low cloud and precipitation anomalies associated with tropical sea surface temperature (SST) variations or El Nino/Southern Oscillation (ENSO), fall into three groups: (1) modulation of tropical deep convection associated ... -
Estimating the Response of Mid-latitude Orographic Precipitation to Global Warming
(2013-07-25)The possible change in orographic precipitation in response to global warming is a rising concern under climate change, which could potentially cause significant societal impact. A general circulation model was employed ... -
Evaluating airborne fluxes of reactive nitrogen compounds over the marine boundary layer: from eddy covariance to wavelet transform
Reactive nitrogen compounds (Nr) have different fates in the atmosphere due to differences in the governing process of chemical transformation, physical transport and deposition. Quantifying dry deposition of critical Nr ... -
Evaluating CFSv2 Subseasonal Forecast Skill with an Emphasis on Tropical Convection
The deterministic predictive skill of CFSv2 is analyzed with respect to lead time and temporal averaging period. We also examine the spatial distributions of error and bias for synoptic-scale parameters and the impacts of ... -
Evaluation of High-Level Clouds in Cloud Resolving Model Simulations with ARM and KWAJEX Observations
(2013-04-17)The objective of this research is to evaluate the performance of microphysical parameterizations in cloud resolving model (CRM). The goal is to understand the reasons for differences between simulated cloud statistics and ... -
Evaluation of the KCl Denuder Method for Gaseous Oxidized Mercury using HgBr<sub>2</sub> at an In-Service AMNet Site
During the summer of 2013, we examined the performance of KCl-coated denuders for measuring gaseous oxidized mercury (GOM) by calibrating with a known source of GOM (i.e., HgBr<sub>2</sub>) at the North Birmingham SouthEastern ... -
Evolution of Secondary Organic Aerosol Composition, Volatility, and Absorption During Oxidation of Phenolic Compounds Under Conditions Relevant to Biomass Burning
Phenolic compounds emitted from wildfires and biomass burning (BB) are highly reactive and yield secondary organic aerosol (SOA) and brown carbon (BrC) upon oxidation initiated by the hydroxyl radical (OH) and nitrate ... -
Evolution of the cross-equatorial atmospheric boundary layer in the east Pacific: observations and models
(2004)The NCAR C-130 research aircraft flew eight missions observing the atmospheric boundary layer (ABL) along 95°W, 1°S--12°N. The positive air-sea temperature difference over the equatorial cold tongue results in a shallow ... -
Examining changes to the Madden-Julian Oscillation in a warmer climate using CMIP5 models
Five models from the Coupled Model Intercomparison Project Phase 5 (CMIP5) that reasonably represent the Madden-Julian Oscillation (MJO) are used to examine the response of the MJO to greenhouse gas induced warming. Changes ... -
Examining the chemistry of atmospheric mercury using aircraft-based measurements and a global chemical transport model
Mercury is a potent neurotoxin that accumulates in fish and enters the human food chain. The largest source of mercury to the oceans is from the deposition of atmospheric mercury. Oxidized mercury species (Hg(II)) in the ... -
Exploring Aerosol-Cloud-Precipitation Feedbacks on Marine Low Cloud Induced by Natural and Anthropogenic Perturbations in a Cloud Resolving Model
This dissertation describes the development of a single mode bulk aerosol model for warm rain microphysics and its application within a cloud resolving model for the simulation of aerosol-cloud-precipitation interactions ... -
Exploring Meteorological and Biomass Burning Aerosol Influences on Marine Stratocumulus in the Southeast Atlantic using WRF-Chem
(2014-04-30)Biomass burning in southern Africa exists in a complex series of relationships with its adjacent and remote environments. Gas and aerosol emissions can be lofted into the free troposphere and undergo long-range transport ... -
Exploring the Interface of Land-Atmosphere Interactions and Boundary Layer Cloud Physics
Boundary layer clouds are fundamental components of the climate system because of their first order impacts on the global energy balance. While marine boundary layer clouds have received most of the attention in this field ... -
Facing Arctic Climate Change: Sea Ice Freeze Through the Lens of A Community
Arctic sea ice loss has significantly affected the wellbeing of Arctic Indigenous communities due to subsistence-based lifeways that depend on the land and ocean in remote coastal locations. Through conversations with ... -
Factors influencing the diurnal temperature range in the contiguous United States
(2000)During the past several decades, much of the United States has experienced a warming, particularly at night, and a marked decrease in the diurnal temperature range (DTR). Observed variations in many variables have been ...