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Now showing items 1-10 of 13
GLOBAL SCALE AEROSOL PROPERTIES: IMPLICATIONS FOR SURFACE SHORTWAVE RADIATION BUDGET
(2005-12-01)
Aerosols are known to affect the shortwave radiation budget of the Earth-atmosphere system. Using truncated Empirical Orthogonal Functions (EOF) fitting, we derive monthly mean aerosol optical depth (AOD) at 0.55 μm ...
Short-term Variability of Atmospheric Extinction During the Night, Under Clear-Sky Conditions, Investigated by Broadband Stellar Photometry
(2004-09-02)
This is a study about the possibility of determining the aerosol optical depth by using star broadband observations from a whole sky imager. The main difficulty in such measurements consists of accurately separating the ...
Analyses of multiple global and regional aerosol products: investigation of aerosol effects and artifacts
(2005-12-02)
Multiple aerosol products derived from satellite, ground-based, and air-borne instruments were analyzed with a focus on satellite-based aerosol products. Aerosol measurements based on different techniques were utilized to ...
An analysis of convective transport, Lightning NO.sub.x production, and chemistry in midlatitude and subtropical thunderstorms
(2006-10-18)
The impact of lightning NO.sub.x production and convective transport on tropospheric chemistry was studied in four thunderstorms observed during field projects using a 3-dimensional (3-D) cloud-scale chemical transport ...
Variability of the Great Plains Low-Level Jet: Large Scale Circulation Context and Hydroclimate Impacts
(2007-04-26)
Variability of the Great Plains Low-Level Jet (GPLLJ) is analyzed from the perspective of larger-scale, lower-frequency influences and regional hydroclimate impacts; as opposed to the usual analysis of its frequency, diurnal ...
BRED VECTORS IN THE NASA NSIPP GLOBAL COUPLED MODEL AND THEIR APPLICATION TO COUPLED ENSEMBLE PREDICTIONS AND DATA ASSIMILATION
(2005-04-27)
The theme of my thesis research is to perform breeding experiments with NASA/NSIPP coupled general circulation model (CGCM) in order to obtain ENSO-related growing modes for ensemble perturbations. We show for the first ...
VARIATIONAL DATA ASSIMILATION OF SOIL MOISTURE INFORMATION
(2005-04-20)
This research examines the feasibility of using observations of land surface temperatures (in principle available from satellite observations) to initialize soil moisture (which is not available on a continental scale). ...
LONGWAVE RADIATIVE TRANSFER THROUGH 3D CLOUD FIELDS: TESTING THE PROBABILITY OF CLEAR LINE OF SIGHT MODELS WITH THE ARM CLOUD OBSERVATIONS
(2004-03-16)
Clouds play a key role in regulating the Earth's climate. Real cloud fields are non-uniform in both the morphological and microphysical sense. However, most climate models assume the clouds to be Plane-Parallel Horizontal ...
The Effect of Deep Convection on Temperatures in the Tropical Tropopause Layer and Its Implications to the Regulation of Tropical Lower Stratospheric Humidity
(2005-04-19)
This dissertation focuses on the impact of deep convection on the thermal structure in the Tropical Tropopause Layer (TTL). Temperatures in this region play an important role in the regulation of water vapor, which in turn ...
Regional Aspects of the North American Land Surface-Atmosphere Interactions and Their Contributions to the Variability and Predictability of the Regional Hydrologic Cycle
(2006-04-17)
In this study, we investigate the pathways responsible for soil moisture-precipitation interactions and the mechanisms for soil moisture memory at regional scales through analysis of NCEP's North American Regional Reanalysis ...