Search for dissertations about: "DOAS"

Showing result 1 - 5 of 18 swedish dissertations containing the word DOAS.

2. 1. Application of DOAS for Studies of Evolving Volcanic Activity in Central America

   Author : Alexander Vladimir Conde Jacobo; Chalmers University of Technology; []
   Keywords : RSAM; seismic events; UV-scattered sunlight; gas scrubbing; sulphur dioxide; DOAS;

   Abstract : Volcanic gas emissions play a critical role in understanding the physical processes that drive eruptive activity. Combining gas measurements with other geophysical parameters provides a more accurate description of the changes that occur beneath a volcano. READ MORE

4. 2. Development and Application of Methods based on DOAS and FTIR Absorption Spectroscopy for Atmospheric Research

   Author : Bo Galle; Chalmers University of Technology; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; open-path; nitrous oxide; DOAS; long-path absorption; landfill; methane; climate gases; ozone depletion; biogenic emissions; fugitive emissions; FTIR; ammonia;

   Abstract : Over the past decades concern about the environmental impact on our atmosphere from human activities has been constantly increasing. From the recognition of local industrial pollution in the first part of this century, over regional scale problems related to urbanisation and growth of traffic systems to global environmental problems such as climate change and stratospheric ozone depletion. READ MORE

5. 3. Studies of Volcanic Plumes with Remote Spectroscopic Sensing Techniques -DOAS and FTIR measurements on volcanoes of the Network for Observation of Volcanic and Atmospheric Change-

   Author : Santiago Arellano; Chalmers University of Technology; []
   Keywords : NATURVETENSKAP; NATURVETENSKAP; NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; NATURAL SCIENCES; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; FTIR; Remote Sensing; DOAS; NOVAC; Volcanic gas emissions;

   Abstract : Volcanism is a rich geodynamical process, closely linked to the origin and ongoing evolution of the lithosphere, atmosphere, hydrosphere and biosphere. Humans have benefited from the resources provided by volcanoes but also been threatened by the dangers of volcanic eruptions, which accurate prediction remains elusive. READ MORE

6. 4. Development and Use of Optical Remote Sensing Methods for Studies of Megacity Air Pollution and Volcanic Gas Emissions

   Author : Mattias Erik Johansson; Chalmers University of Technology; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; volcano; emission; Megacity; air pollution; tomography; DOAS;

   Abstract : Optical Remote Sensing Techniques offers the opportunity to, in real-time, obtain line averaged measurements of gases in the lower and upper atmosphere. These techniques easily offer themselves to automatization, which increases their usability for e.g. READ MORE

7. 5. Optical remote sensing of industrial gas emission fluxes

   Author : John Johansson; Chalmers University of Technology; []
   Keywords : NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES; DOAS; formaldehyde; optical remote sensing; gas emission; absorption spectroscopy; solar occultation; VOC; flux measurement; FTIR;

   Abstract : Mobile optical remote sensing techniques offer promising possibilities to quantify and geographically attribute local industrial gaseous emissions to the atmosphere. Studies have shown that such emissions are often poorly understood, underestimated, and thereby not properly accounted for in emission inventories and regional atmospheric chemistry models, especially for emissions of VOCs. READ MORE