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Akademický článek

Reassessing the ratio of glyoxal to formaldehyde as an indicator of hydrocarbon precursor speciation

Autor: J. Kaiser, G. M. Wolfe, K. E. Min, S. S. Brown, C. C. Miller, D. J. Jacob, J. A. deGouw, M. Graus, T. F. Hanisco, J. Holloway, J. Peischl, I. B. Pollack, T. B. Ryerson, C. Warneke, R. A. Washenfelder, F. N. Keutsch

Publikováno v: Atmospheric Chemistry and Physics, Vol 15, Iss 13, Pp 7571-7583 (2015)

The yield of formaldehyde (HCHO) and glyoxal (CHOCHO) from oxidation of volatile organic compounds (VOCs) depends on precursor VOC structure and the concentration of NOx (NOx = NO + NO2). Previous work has proposed that the ratio of CHOCHO to HCHO (R

Externí odkaz: https://doaj.org/article/77729f7d4df8403598171da04e21a167

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Akademický článek

Impact of improved representation of volatile organic compound emissions and production of NOx reservoirs on modeled urban ozone production

Autor: K. R. Travis, B. A. Nault, J. H. Crawford, K. H. Bates, D. R. Blake, R. C. Cohen, A. Fried, S. R. Hall, L. G. Huey, Y. R. Lee, S. Meinardi, K.-E. Min, I. J. Simpson, K. Ullman

Publikováno v: Atmospheric Chemistry and Physics, Vol 24, Pp 9555-9572 (2024)

The fraction of urban volatile organic compound (VOC) emissions attributable to fossil fuel combustion has been declining in many parts of the world, resulting in a need to better constrain other anthropogenic sources of these emissions. During the N

Externí odkaz: https://doaj.org/article/6a12fb71882c442abe3403f04f16a743

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Akademický článek

Importance of biogenic precursors to the budget of organic nitrates: observations of multifunctional organic nitrates by CIMS and TD-LIF during BEARPEX 2009

Autor: M. R. Beaver, J. M. St. Clair, F. Paulot, K. M. Spencer, J. D. Crounse, B. W. LaFranchi, K. E. Min, S. E. Pusede, P. J. Wooldridge, G. W. Schade, C. Park, R. C. Cohen, P. O. Wennberg

Publikováno v: Atmospheric Chemistry and Physics, Vol 12, Iss 13, Pp 5773-5785 (2012)

Alkyl and multifunctional organic nitrates, molecules of the chemical form RONO2, are products of chain terminating reactions in the tropospheric HOx and NOx catalytic cycles and thereby impact ozone formation locally. Many of the molecules in the cl

Externí odkaz: https://doaj.org/article/6206d9ee2a4245239e75009998e233bb

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Akademický článek

Closing the peroxy acetyl nitrate budget: observations of acyl peroxy nitrates (PAN, PPN, and MPAN) during BEARPEX 2007

Autor: B. W. LaFranchi, G. M. Wolfe, J. A. Thornton, S. A. Harrold, E. C. Browne, K. E. Min, P. J. Wooldridge, J. B. Gilman, W. C. Kuster, P. D. Goldan, J. A. de Gouw, M. McKay, A. H. Goldstein, X. Ren, J. Mao, R. C. Cohen

Publikováno v: Atmospheric Chemistry and Physics, Vol 9, Iss 19, Pp 7623-7641 (2009)

Acyl peroxy nitrates (APNs, also known as PANs) are formed from the oxidation of aldehydes and other oxygenated VOC (oVOC) in the presence of NO2. There are both anthropogenic and biogenic oVOC precursors to APNs, but a detailed evaluation of this ch

Externí odkaz: https://doaj.org/article/e0293ed13d904f50a5f9942aa08e1238

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Akademický článek

Characterization of errors in satellite-based HCHO ∕ NO2 tropospheric column ratios with respect to chemistry, column-to-PBL translation, spatial representation, and retrieval uncertainties

Publikováno v: Atmospheric Chemistry and Physics, Vol 23, Pp 1963-1986 (2023)

The availability of formaldehyde (HCHO) (a proxy for volatile organic compound reactivity) and nitrogen dioxide (NO2) (a proxy for nitrogen oxides) tropospheric columns from ultraviolet–visible (UV–Vis) satellites has motivated many to use their

Externí odkaz: https://doaj.org/article/a82c4cefd87b4605a1311ef9527f0c73

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Akademický článek

Development of a broadband cavity-enhanced absorption spectrometer for simultaneous measurements of ambient NO3, NO2, and H2O

Autor: W. Nam, C. Cho, B. Perdigones, T. S. Rhee, K.-E. Min

Publikováno v: Atmospheric Measurement Techniques, Vol 15, Pp 4473-4487 (2022)

We describe the characteristics and performances of our newly built broadband cavity-enhanced absorption spectrometer for measurements of nitrate radical (NO3), nitrogen dioxide (NO2), and water vapor (H2O). A customized vibration-resistance cavity l

Externí odkaz: https://doaj.org/article/0f16f2dc7ac24031ad8cf74d957d8b5e

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Akademický článek

Field observational constraints on the controllers in glyoxal (CHOCHO) reactive uptake to aerosol

Publikováno v: Atmospheric Chemistry and Physics, Vol 22, Pp 805-821 (2022)

Glyoxal (CHOCHO), the simplest dicarbonyl in the troposphere, is a potential precursor for secondary organic aerosol (SOA) and brown carbon (BrC) affecting air quality and climate. The airborne measurement of CHOCHO concentrations during the KORUS-AQ

Externí odkaz: https://doaj.org/article/24f60ef7d4104094a62a1beee08c6bd1

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Akademický článek

Eddy covariance fluxes and vertical concentration gradient measurements of NO and NO2 over a ponderosa pine ecosystem: observational evidence for within-canopy chemical removal of NOx

Autor: K.-E. Min, S. E. Pusede, E. C. Browne, B. W. LaFranchi, R. C. Cohen

Publikováno v: Atmospheric Chemistry and Physics, Vol 14, Iss 11, Pp 5495-5512 (2014)

Exchange of NOx (NO+NO2) between the atmosphere and biosphere is important for air quality, climate change, and ecosystem nutrient dynamics. There are few direct ecosystem-scale measurements of the direction and rate of atmosphere–biosphere exchang

Externí odkaz: https://doaj.org/article/32ef02ab3a2845a6af7f30d6ce4c8649

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