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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 73 for “"Vertical profiles."”.
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Vertical Profiles of NO 2 and HONO in the Planetary Boundary Layer
… used for long-term measurements (13 months) of vertical profiles of NO2 and HONO on three light paths above the city of Heidelberg, Germany. Both trace gasses were observed to feature concentrations that decrease with increasing altitude under virtually all atmospheric conditions. It was also …
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Quantifying Stratospheric Chlorine Chemistry by the Satellite Spectrometers GOME and SCIAMACHY
… in the limb geometry can be inverted to vertical profiles by calculation of the radiative transfer, which increases the information content with respect to a measurement of the column density essentially. In this thesis, algorithms for the retrieval of vertical profiles of OClO, ozone, …
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Remote Sensing of the Lower Atmosphere: From Surface Concentration to Mixing Layer Height
… surface concentration, tropospheric column and vertical profile for different trace gases. It addresses an important gap in near surface air quality measurements that is difficult for in-situ, satellite and other remote sensing measurements to address. Different applications of the MAX-DOAS …
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Modeling nighttime chemistry with WRF/chem: sensitivity to vertical resolution and boundary layer parameterization
… crucially on the characteristic development of vertical profiles of gas phase and aerosol phase species in the nocturnal boundary layer. Resolving these profiles adequately is a prerequisite for a good representation of nighttime chemistry and poses an important modeling challenge. In this work …
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Evaluation and Application of Max-DOAS Methods for Monitoring Aerosols, NO2, and SO2 in Urban and Industrial Environments
… including the determination of emissions, vertical profiles, and the tropospheric column loading of trace gases. Deployment of the MAX-DOAS instrument during the comprehensive air quality campaign in the Athabasca Oil Sands Region in 2013 provided a rare opportunity to evaluate the …
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Modelling the speciation and biogeochemistry of iron in oceanic surface waters at the Bermuda Atlantic Time-series Study site
… was able to simulate the temporal patterns and vertical profiles of dissolved iron in the upper ocean at the BATS site reasonably well. Subsurface model profiles depended strongly on the parameter values chosen for loss processes affecting iron, colloidal aggregation and scavenging onto …
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An investigation of the primary sources of the Cape Town brown haze
… of the atmosphere in a programme of lateral and vertical profiles through the Brown Haze. The field campaign took place from the 29th July 2003 to the 26th August 2003 around the Cape Town metropolitan region.
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Determination of dissolved trace metals in the western North Pacific
… the chemical composition of seawater. Data from 6vertical profiles in the western and central North Pacific Ocean and 14 surface samples along a transect from Japan to Hawaii, collected in the spring of 1991, are reported here. Vertical profiles for dissolved Cd, Ni, Zn, Cu, Pb, Mn, and Co from …
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Optimierung der Parameterauswahl für ein operationelles off-line-Retrieval von Spurengasvertikalprofilen aus MIPAS-Daten
… for an operational off-line retrieval of vertical profiles of trace gases from MIPAS data”. Since March 2002 the environment satellite ENVISAT is operational. ENVISAT carries a series of instruments used for remote sensing the earth atmosphere. MIPAS, as one of those instruments is, due to …
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Physical Processes that Affect Hypoxia in the Thames River Estuary, USA
… and oxygen levels in Norwich Harbor. Daily vertical profiles of temperature, salinity, and dissolved oxygen paired with monthly monitoring of tidal cycles provide new insight to the pattern of the anoxic and hypoxic conditions that are present in the harbor during the summer months. Regular …
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A General Observational Strategy for Validation of Satellite NO₂ Retrievals using Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS)
… chemical transport model was used to simulate profiles and vertical column densities of real measurements taken during the TROLIX'19 Field Campaign. The LOTOs-EUROS model was used to simulate vertical profiles as well as Vertical Column Densities based on real MAX-DOAS measurements as well as …
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Waves, currents, and sediment transport in the surf zone along long, straight beaches
… for time-varying and hence arbitrary beach profiles. The near-shore hydrodynamics model consists of wave, surface roller, and near- shore current models. Both wave and surface roller models are based on simple energy balance equations and, based on these models, the near-shore current is …
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Understanding the chemistry of atmospheric particles using single particle mass spectrometry
… particles is presented and used to derive vertical profiles of bioaerosol from near-surface to the upper troposphere.
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FLUORESCENCE STUDIES IN THE INDUCTIVELY COUPLED PLASMA
… in the literature for a commercial system. Vertical profiles of the plasma, using radial excitation, were obtained for Ba, Li , Mg and Na. Using the optimum conditions for Li and Na, vertical profiles of the plasma, using axial excitation with the more intense LEDs, were obtained. Both …
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Development and Application of a Versatile Balloon-Borne DOAS Spectrometer for Skylight Radiance and Atmospheric Trace Gas Profile Measurements
… simulate the measured quantities and (b) infer vertical profiles of O3, NO2, and BrO concentrations. Since the measurements were performed under a variety of viewing geometries, they provide a stringent validation of the applied Monte Carlo RT model. The new method of atmospheric trace gas …
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Preliminary investigation of light scattering and visibility in two eastern national parks
… aircraft. Data obtained from horizontal and vertical profiles flown in the two parks on six days between April and June 1979 were utilized in this study. However, these data are not conclusive in that sampling flights were performed under ideal visual flight conditions, and not in the peak …
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Convective Transport of Tropical Marine Boundary Layer Species into the Upper Troposphere and Relation to Species Lifetime: In Situ Measurements and Global Model Simulation
… from less than a day to several years. The vertical profiles of these species suggest that they fall into three main groups delineated by their lifetime: 1) very long-lived trace gases demonstrating a nearly constant vertical structure, 2) intermediate lifetime species exhibiting a reverse …
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Hydraulic Characterization of Mounded Gravel Fish Nests: Incipient Motion Criteria and Despiking Acoustic Doppler Velocimeter Data
… of finding bed shear stress from velocity vertical profiles are evaluated. Bed shear stress is found over the profile of 26 field nests. The ambient to peak flow stress amplification due to a nest's bed protrusion is found to be a proportion of τ = 1.66τ to determine a critical ambient …
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An investigation of wave-induced momentum flux through phase averaging of open ocean wind and wave fields
… the dominant, wind-driven, surface waves on the vertical flux of horizontal momentum in the marine surface layer over open ocean conditions. Through a procedure which involves phase averaging the wind fields at the period of the dominant waves, the wave-induced component of the atmospheric …
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