Differential Optical Absorption Spectroscopy of Trace Gas Species and Aerosols in the Upper Ohio River Valley

Differential Optical Absorption Spectroscopy of Trace Gas Species and Aerosols in the Upper Ohio River Valley

Bibliographic Details
Main Author: Beekman, Christopher Paul
Language:English
Published: The Ohio State University / OhioLINK 2010
Subjects:
Environmental Science
MAX-DOAS
Ohio River Valley
power plant plumes
air pollution
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=osu1268143515
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-osu12681435152021-08-03T05:58:46Z Differential Optical Absorption Spectroscopy of Trace Gas Species and Aerosols in the Upper Ohio River Valley Beekman, Christopher Paul Environmental Science MAX-DOAS Ohio River Valley power plant plumes air pollution In this research, it is hypothesized that recently developed theoretical considerations of atmospheric radiative transfer in horizontally in-homogeneous atmospheres can be applied to the remote measurement of anthropogenic plumes. To this end, a MAX-DOAS spectrometer, designed around a BandW-TEK BTU142 spectrometer was constructed and characterized. It was found that the MAX-DOAS spectrometer has a measured resolution of 0.282 nm, and a noise level of 178 counts at 75% pixel saturation, sufficient to resolve accurately the absorptions of important atmospheric species, including SO<sub>2</sub>, NO<sub>2</sub>, HCHO, and O<sub>4</sub>. The theory of MAX-DOAS spectral analysis was examined in detail, in particular the processing of reference absorption cross-section spectra for use in regression analyses of scattered solar radiation. For the purposes of inversion, optimal estimation software was designed and investigated for suitability in retrieving vertical profiles of atmospheric species. This software is shown to perform well under conditions of both typical and non-typical noise levels using synthetic spectral data and known profiles of three atmospheric species. Furthermore, an extensive examination of the residuals of DOAS spectral analysis was performed, to validate the assumption of normally distributed errors in the inversion process. Investigated methodologies were applied to spectral data collected over nine days in 2008 in the Upper Ohio River Valley. Aerosol extinction coefficient profiles were successfully retrieved, with an average peak value of 0.549 km<sup>-1</sup>. For the same measurement period, in-plume measurements of SO<sub>2</sub> and NO<sub>2</sub> concentration from a coal-fired power plant were conducted using recently developed methodologies to account for in-plume solar radiative transfer effects. 2010-08-23 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1268143515 http://rave.ohiolink.edu/etdc/view?acc_num=osu1268143515 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Environmental Science
MAX-DOAS
Ohio River Valley
power plant plumes
air pollution
spellingShingle Environmental Science
MAX-DOAS
Ohio River Valley
power plant plumes
air pollution
Beekman, Christopher Paul
Differential Optical Absorption Spectroscopy of Trace Gas Species and Aerosols in the Upper Ohio River Valley
author Beekman, Christopher Paul
author_facet Beekman, Christopher Paul
author_sort Beekman, Christopher Paul
title Differential Optical Absorption Spectroscopy of Trace Gas Species and Aerosols in the Upper Ohio River Valley
title_short Differential Optical Absorption Spectroscopy of Trace Gas Species and Aerosols in the Upper Ohio River Valley
title_full Differential Optical Absorption Spectroscopy of Trace Gas Species and Aerosols in the Upper Ohio River Valley
title_fullStr Differential Optical Absorption Spectroscopy of Trace Gas Species and Aerosols in the Upper Ohio River Valley
title_full_unstemmed Differential Optical Absorption Spectroscopy of Trace Gas Species and Aerosols in the Upper Ohio River Valley
title_sort differential optical absorption spectroscopy of trace gas species and aerosols in the upper ohio river valley
publisher The Ohio State University / OhioLINK
publishDate 2010
url http://rave.ohiolink.edu/etdc/view?acc_num=osu1268143515
work_keys_str_mv AT beekmanchristopherpaul differentialopticalabsorptionspectroscopyoftracegasspeciesandaerosolsintheupperohiorivervalley
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