Journal ArticleDOI
High-resolution absorption cross-section of glyoxal in the UV–vis and IR spectral ranges
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TLDR
In this article, high-resolution absorption cross-sections of glyoxal have been recorded at 296 k in the ultraviolet and visible (UV-vis: 19000-40000 cm−1, 250-526 k) spectral ranges by means of a Fourier transform spectrometer (FTS).Abstract:
High-resolution absorption cross-sections of glyoxal have been recorded at 296 K in the ultraviolet and visible (UV–vis: 19000–40000 cm−1, 250–526 nm) and infrared (IR: 1200–8000 cm−1) spectral ranges by means of a Fourier transform spectrometer (FTS). The UV–vis spectra were measured at 1 atm of N2 bath gas. The spectral resolution of the FTS was selected to be 0.06 cm−1 for the richly structured A ˜ 1Au – X ˜ 1Ag and a ˜ 3Au – X ˜ 1Ag band systems, and 1 cm−1 for the diffuse B ˜ − X ˜ transition, which was sufficient to resolve most spectral structures. In addition, low and high-resolution IR spectra (1 and 0.009 cm−1 spectral resolution) of glyoxal/N2 mixtures were recorded around 2835 cm−1 at 0.2 mbar, 100 mbar, 300 mbar and 1 atm total pressure. UV–vis and IR spectra were recorded quasi-simultaneously by making sequential measurements of identical glyoxal mixtures in the cell, enabling the direct comparison of UV–vis and IR spectral parameters for the first time. The high-resolution spectra have been used to simulate deviations from Lambert–Beer's law, which occur at lower resolution when spectra are not fully resolved. Special attention has been paid to reduce the uncertainty of the UV–vis spectrum, allowing for an improved determination of the atmospheric photolysis of glyoxal. Finally, the new UV–vis spectrum has been used to redetermine our previous DOAS measurements of glyoxal yields from the reactions of OH radicals with benzene, toluene and p-xylene. The high-resolution spectral data can be obtained from http://iup.physik.uni-bremen.de/gruppen/molspec/index.html or email request to the authors.read more
Citations
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Journal ArticleDOI
Simultaneous global observations of glyoxal and formaldehyde from space
Folkard Wittrock,Andreas Richter,Hilke Oetjen,John P. Burrows,Maria Kanakidou,Stelios Myriokefalitakis,Rainer Volkamer,Steffen Beirle,Ulrich Platt,Thomas Wagner +9 more
TL;DR: Wittrock et al. as mentioned in this paper presented the first global simultaneous observations of glyoxal (CHOCHO) and formaldehyde (HCHO) columns retrieved from measurements by the Scanning Imaging Absorption Spectrometer for Atmospheric Cartography (SCIAMACHY) satellite instrument.
Journal ArticleDOI
Tropospheric emissions: Monitoring of pollution (TEMPO)
P. Zoogman,Xiong Liu,Raid Suleiman,W. F. Pennington,David Flittner,Jay Al-Saadi,B.B. Hilton,D. K. Nicks,Michael J. Newchurch,J. L. Carr,Scott J. Janz,M.R. Andraschko,Antti Arola,B. Baker,B. Canova,C. Chan Miller,Ronald C. Cohen,J.E. Davis,M.E. Dussault,David P. Edwards,Jack Fishman,Abduwasit Ghulam,G. Gonzalez Abad,Michel Grutter,Jay R. Herman,J. Houck,Daniel J. Jacob,Joanna Joiner,Brian Kerridge,Jhoon Kim,Nickolay A. Krotkov,Lok N. Lamsal,Can Li,Can Li,Anders V. Lindfors,Randall V. Martin,Randall V. Martin,C. T. McElroy,Chris A. McLinden,Vijay Natraj,Doreen Neil,Caroline R. Nowlan,E.J. O׳Sullivan,Paul I. Palmer,Robert B. Pierce,M.R. Pippin,Alfonso Saiz-Lopez,Robert Spurr,J. Szykman,Omar Torres,J. P. Veefkind,B. Veihelmann,Huiqun Wang,Jun Wang,Kelly Chance +54 more
TL;DR: TEMPO was selected in 2012 by NASA as the first Earth Venture Instrument, for launch between 2018 and 2021, and it will measure atmospheric pollution for greater North America from space using ultraviolet and visible spectroscopy as mentioned in this paper.
Journal ArticleDOI
DOAS measurement of glyoxal as an indicator for fast VOC chemistry in urban air
TL;DR: In this article, the first direct measurements of glyoxal (CHOCHO) in the atmosphere were presented, and demonstrated that the measurements are possible by differential optical absorption spectroscopy (DOAS).
Journal ArticleDOI
Quantitative observation of cyanobacteria and diatoms from space using PhytoDOAS on SCIAMACHY data
Astrid Bracher,Astrid Bracher,Marco Vountas,Tilman Dinter,John P. Burrows,Rüdiger Röttgers,Ilka Peeken +6 more
TL;DR: In this article, the authors adapted the technique of Differential Optical Absorption Spectroscopy (DOAS) for the retrieval of the absorption and biomass of two major phytoplankton groups (PhytoDOAS).
Journal ArticleDOI
Oxidative capacity of the Mexico City atmosphere - Part 1: A radical source perspective
TL;DR: In this article, a detailed analysis of near field photochemical regime inside the Mexico City metropolitan area (MCMA) was presented for the near field radical sources, and an extensive set of measurements was collected to quantify time-resolved ROx (sum of OH, HO2, RO2) radical production rates from day and nighttime radical sources.
References
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Book ChapterDOI
The Role of Solar Radiation in Atmospheric Chemistry
Sasha Madronich,S. J. Flocke +1 more
TL;DR: In this article, the photo-dissociation rate coefficients (J values) are used to understand the behavior of global stratospheric and tropospheric ozone, the atmospheric lifetimes of gases such as carbon monoxide, methane, and non-methane hydrocarbons, and the formation of oxidants at urban and regional scales.
Book
The Mechanisms of atmospheric oxidation of aromatic hydrocarbons
TL;DR: In this article, the importance of aromatic hydrocarbons in the chemistry of ozone generation in the urban atmosphere has been discussed, and some common products of the atmospheric oxidation of the aromatic compounds of polycyclic aromatic hydrocbons are discussed.
Journal ArticleDOI
Primary and Secondary Glyoxal Formation from Aromatics: Experimental Evidence for the Bicycloalkyl−Radical Pathway from Benzene, Toluene, and p-Xylene
Rainer Volkamer,Ulrich Platt,Klaus Wirtz,Centro de Estudios,Ambientales del Mediterraneo,C. Charles,R. Darwin +6 more
TL;DR: In this paper, a new approach is presented to study the ring-cleavage process of benzene, toluene, and p-xylene (BTX) in a series of experiments at the EUPHORE outdoor simulation chamber.
Journal ArticleDOI
On-road emissions of carbonyls from light-duty and heavy-duty vehicles
TL;DR: Aromatic carbonyls, unsaturatedAliphatic aldehydes, and aliphatic dicarbonyls represented larger fractions of the total carbonyl emissions for 7-8 HD vehicles than for LD vehicles, and formaldehyde and acetaldehyde emission factors measured in this study are generally lower than those measured in earlier work.
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