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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 11 to 20 of 85 (0.012 seconds)| 11 |
Understanding field measurements through a master chemical mechanismSommariva, Roberto Carlo January 2004 (has links)
No description available.
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Complex mixture analysis using time of flight mass spectrometry and comprehensive gas chromatographyHamilton, Jacqueline Fiona January 2003 (has links)
No description available.
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Monitoring and modelling direct atmospheric formaldehyde measurementsAl-Haider, Sahailah Ahmed January 2006 (has links)
No description available.
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| 14 |
Airborne measurements of hydroxyl radicals by fluorescence assay by gas expansionFloquet, Cedric Florian Aymeric January 2006 (has links)
No description available.
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| 15 |
Alkyl nitrates (Câ‚-Câ‚…), trihalomethanes and related compounds in contemporary air and air preserved in polar firn and iceWorton, David R. January 2005 (has links)
No description available.
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| 16 |
The chemistry of Fe+ and Fe-containing ions with atmospheric gases : implications for the lifetimes of sporadic E layersWoodcock, Kenneth Reginald Simon January 2007 (has links)
No description available.
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| 17 |
Retrieval of atmospheric composition from the MIPAS satellite instrumentBurgess, Alastair Buchanan January 2005 (has links)
No description available.
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Retrieval of water vapour and methane from the MIPAS satellite instrumentPayne, Vivienne Helen January 2005 (has links)
No description available.
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Measurements of HCFC-22 in the upper troposphere and lower stratosphere from the MIPAS-E instrumentMoore, David Philip January 2005 (has links)
In this thesis, the potential for retrieval of HCFC-22 volume mixing ratios in the upper troposphere and lower stratosphere (UTLS) from a spaceborne infrared limb-sounding spectrometer is assessed. Hydrochlorofluorocarbon-22 (HCFC-22) is an important trace constituent in the atmosphere through its role as a greenhouse gas and its potential influence on stratospheric ozone chemistry. Current estimates of its vertical distribution are limited to infrequent and sparse balloon and aircraft campaigns, giving poor spatial coverage. Atmospheric limb-emission spectra measured by the Michelson Interferometer for Passive Atmospheric Sounding onboard the ENVISAT satellite (MIPAS-E) have been used to successfully detect and retrieve HCFC-22 volume mixing ratios (vmrs) between 9 and 15 km. Global and seasonal means are presented from 2003. This is achieved using the Optimal Estimation Retrieval Algorithm (OPERA) developed as part of this thesis and designed specifically to invert measurements from MIPAS-E data to trace gas concentrations. The scheme performs a joint retrieval of the target gas and total extinction from clouds or aerosols. High extinctions are observed globally at 9 km. In January 2003, global mean HCFC-22 vmr data at 9 km agreed to within 8% of the measured mean surface value. Mean agreement for all seasons in 2003 was 15%. Indications are that mean HCFC-22 data at 9 km are accurate to better than 10%. Vertical profiles were distinguished between 9 and 15 km. OPERA CFC-12 retrievals were used as a consistency check on the likely accuracy of HCFC-22 data. These data were validated against independent measurements. Agreement with HAGAR measurements in spring 2003 was better than 7%. The results of this thesis demonstrate that HCFC-22 (and CFC-12) can be detected and retrieved from MIPAS-E data in the UTLS based on current concentrations. In addition, they show the potential to obtain other vertical profiles of particle extinction on a global basis throughout the UTLS.
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Dynamics of the tropical tropopause and lower stratosphereTindall, Julia Claire January 2004 (has links)
No description available.
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