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Journal articles on the topic 'Hydrocarbons. Photochemistry'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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1

Luspay-Kuti, Adrienn, Kathleen Mandt, Kandis-Lea Jessup, et al. "Photochemistry on Pluto – I. Hydrocarbons and aerosols." Monthly Notices of the Royal Astronomical Society 472, no. 1 (2017): 104–17. http://dx.doi.org/10.1093/mnras/stx1362.

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2

Yu, Hongtao. "ENVIRONMENTAL CARCINOGENIC POLYCYCLIC AROMATIC HYDROCARBONS: PHOTOCHEMISTRY AND PHOTOTOXICITY." Journal of Environmental Science and Health, Part C 20, no. 2 (2002): 149–83. http://dx.doi.org/10.1081/gnc-120016203.

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3

Ostojic, Bojana D., and Dragana S. Dordevic. "Photochemistry of Nitrated Polycyclic Aromatic Hydrocarbons under Solar Radiation." Current Organic Chemistry 22, no. 10 (2018): 973–86. http://dx.doi.org/10.2174/1385272821666171116161755.

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4

Chemerisov, S. D., D. W. Werst, and A. D. Trifunac. "Photoionization and Energy-Dependent Photochemistry of Hydrocarbons in Zsm5†." Research on Chemical Intermediates 25, no. 6 (1999): 583–97. http://dx.doi.org/10.1163/156856799x00572.

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5

Plummer, Benjamin F. "Structure and Photochemistry of Cyclopentene Fused Polycyclic Aromatic Hydrocarbons." Polycyclic Aromatic Compounds 3, no. 2 (1993): 77–88. http://dx.doi.org/10.1080/10406639308047860.

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6

Bouwman, J., A. L. Mattioda, H. Linnartz, and L. J. Allamandola. "Photochemistry of polycyclic aromatic hydrocarbons in cosmic water ice." Astronomy & Astrophysics 525 (December 3, 2010): A93. http://dx.doi.org/10.1051/0004-6361/201015059.

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7

Bouwman, J., H. M. Cuppen, M. Steglich, L. J. Allamandola, and H. Linnartz. "Photochemistry of polycyclic aromatic hydrocarbons in cosmic water ice." Astronomy & Astrophysics 529 (March 30, 2011): A46. http://dx.doi.org/10.1051/0004-6361/201015762.

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8

Dobrijevic, M., T. Cavalié, E. Hébrard, F. Billebaud, F. Hersant, and F. Selsis. "Key reactions in the photochemistry of hydrocarbons in Neptune's stratosphere." Planetary and Space Science 58, no. 12 (2010): 1555–66. http://dx.doi.org/10.1016/j.pss.2010.07.024.

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9

Baird, N. Colin, Anthony M. Draper, and Paul de Mayo. "Surface photochemistry: Semiconductor mediated reactions of some saturated strained hydrocarbons." Canadian Journal of Chemistry 66, no. 7 (1988): 1579–88. http://dx.doi.org/10.1139/v88-256.

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Quadricyclane (1) and 1,8-bishoniocubane (2) have been found to undergo valence isomerization to norborndiene and tricyclo[4.2.2.02,5]deca-3,7-diene, respectively, on illuminated CdS and ZnO. An electron transfer mechanism is proposed. Quantum yield, solvent effects, the role of oxygen, and the quenching of the reaction were investigated, and were consistent with this interpretation. The thermal reaction of 1 on CdS was also suggested to be an electron transfer process involving, in this case, defects or trapped holes on the surface of the semiconductor. An examination of a series of strained

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10

Leigh, William J. "Techniques and applications of far-UV photochemistry in solution. The photochemistry of the C3H4 and C4H6 hydrocarbons." Chemical Reviews 93, no. 1 (1993): 487–505. http://dx.doi.org/10.1021/cr00017a021.

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11

Nehr, S., B. Bohn, H. P. Dorn, et al. "Atmospheric photochemistry of aromatic hydrocarbons: OH budgets during SAPHIR chamber experiments." Atmospheric Chemistry and Physics Discussions 14, no. 5 (2014): 5535–60. http://dx.doi.org/10.5194/acpd-14-5535-2014.

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Abstract. Current photochemical models developed to simulate the atmospheric degradation of aromatic hydrocarbons tend to underestimate OH radical concentrations. In order to analyse OH budgets, we performed experiments with benzene, toluene, p-xylene, and 1,3,5-trimethylbenzene in the atmosphere simulation chamber SAPHIR. Experiments were conducted under low-NO conditions (typically 0.1–0.2 ppb) and high-NO conditions (typically 7–8 ppb), and starting concentrations of 6–250 ppb of aromatics, dependent on OH rate constants. For the OH budget analysis a steady-state approach was applied where

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12

Wallis, J. M., and Jay K. Kochi. "Direct osmylation of benzenoid hydrocarbons. Charge-transfer photochemistry of osmium tetraoxide." Journal of Organic Chemistry 53, no. 8 (1988): 1679–86. http://dx.doi.org/10.1021/jo00243a015.

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13

PLUMMER, B. F. "ChemInform Abstract: Structure and Photochemistry of Cyclopentene-Fused Polycyclic Aromatic Hydrocarbons." ChemInform 25, no. 26 (2010): no. http://dx.doi.org/10.1002/chin.199426303.

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14

Adam, Waldemar, and Thomas Oppenländer. "185-nm Photochemistry of Olefins, Strained Hydrocarbons, and Azoalkanes in Solution." Angewandte Chemie International Edition in English 25, no. 8 (1986): 661–72. http://dx.doi.org/10.1002/anie.198606613.

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15

Smith, Gregory P., and David Nash. "Local sensitivity analysis for observed hydrocarbons in a Jupiter photochemistry model." Icarus 182, no. 1 (2006): 181–201. http://dx.doi.org/10.1016/j.icarus.2005.12.005.

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16

Nehr, S., B. Bohn, H. P. Dorn, et al. "Atmospheric photochemistry of aromatic hydrocarbons: OH budgets during SAPHIR chamber experiments." Atmospheric Chemistry and Physics 14, no. 13 (2014): 6941–52. http://dx.doi.org/10.5194/acp-14-6941-2014.

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Abstract. Current photochemical models developed to simulate the atmospheric degradation of aromatic hydrocarbons tend to underestimate OH radical concentrations. In order to analyse OH budgets, we performed experiments with benzene, toluene, p-xylene and 1,3,5-trimethylbenzene in the atmosphere simulation chamber SAPHIR. Experiments were conducted under low-NO conditions (typically 0.1–0.2 ppb) and high-NO conditions (typically 7–8 ppb), and starting concentrations of 6–250 ppb of aromatics, dependent on OH rate constants. For the OH budget analysis a steady-state approach was applied in whic

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17

LEIGH, W. J. "ChemInform Abstract: Techniques and Applications of Far-UV Photochemistry in Solution. The Photochemistry of the C3H4 and C4H6 Hydrocarbons." ChemInform 24, no. 21 (2010): no. http://dx.doi.org/10.1002/chin.199321296.

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18

Hervé, M., P. Castellanos, G. Karras, et al. "PAH under XUV excitation: an ultrafast XUV-photochemistry experiment for astrophysics." EPJ Web of Conferences 205 (2019): 06012. http://dx.doi.org/10.1051/epjconf/201920506012.

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Understanding processes induced by XUV excitation of Polycyclic Aromatic Hydrocarbons (PAHs) is at the heart of molecular astrophysics, which aims at understanding molecular evolution in interstellar media. We used ultrashort XUV pulses to produce highly excited PAHs cations. The photo-induced dynamics is probed using a pump-probe XUV-IR spectroscopy. By studying PAH from small (naphthalene) to large (hexabenzocoronene) PAHs, we show that the dynamic is governed by the large density of states, in which many-body quantum effects are dominant.

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19

Sessler, Jonathan L., Yuji Kubo, and Anthony Harriman. "The photochemistry of pyrene-cytosine conjugates: Modelling the carcinogenic action of aromatic hydrocarbons." Journal of Physical Organic Chemistry 5, no. 10 (1992): 644–48. http://dx.doi.org/10.1002/poc.610051005.

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20

Rimmer, Paul B., Catherine Walsh, and Christiane Helling. "Cosmic Rays, UV Photons, and Haze Formation in the Upper Atmospheres of Hot Jupiters." Proceedings of the International Astronomical Union 8, S299 (2013): 303–4. http://dx.doi.org/10.1017/s1743921313008703.

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AbstractCosmic ray ionization has been found to be a dominant mechanism for the formation of ions in dense interstellar environments. Cosmic rays are further known to initiate the highly efficient ion-neutral chemistry within star forming regions. In this talk we explore the effect of both cosmic rays and UV photons on a model hot Jupiter atmosphere using a non-equlibrium chemical network that combines reactions from the UMIST Database for Astrochemistry, the KIDA database for interstellar and protoplanetary environments and three-body and combustion reactions from the NIST database and from v

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21

Domine, Florent. "Should We Not Further Study the Impact of Microbial Activity on Snow and Polar Atmospheric Chemistry?" Microorganisms 7, no. 8 (2019): 260. http://dx.doi.org/10.3390/microorganisms7080260.

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Since 1999, atmospheric and snow chemists have shown that snow is a very active photochemical reactor that releases reactive gaseous species to the atmosphere including nitrogen oxides, hydrocarbons, aldehydes, halocarbons, carboxylic acids and mercury. Snow photochemistry therefore affects the formation of ozone, a potent greenhouse gas, and of aerosols, which affect the radiative budget of the planet and, therefore, its climate. In parallel, microbiologists have investigated microbes in snow, identified and quantified species, and sometimes discussed their nutrient supplies and metabolism, i

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22

Hidy, G. M. "Atmospheric Chemistry in a Box or a Bag." Atmosphere 10, no. 7 (2019): 401. http://dx.doi.org/10.3390/atmos10070401.

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Environmental chambers have proven to be essential for atmospheric photochemistry research. This historical perspective summarizes chamber research characterizing smog. Experiments with volatile organic compounds (VOCs)-nitrogen oxides (NOx) have characterized O3 and aerosol chemistry. These led to the creation and evaluation of complex reaction mechanisms adopted for various applications. Gas-phase photochemistry was initiated and developed using chamber studies. Post-1950s study of photochemical aerosols began using smog chambers. Much of the knowledge about the chemistry of secondary organi

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23

Salameh, Thérèse, Stéphane Sauvage, Charbel Afif, et al. "Exploring the seasonal NMHC distribution in an urban area of the Middle East during ECOCEM campaigns: very high loadings dominated by local emissions and dynamics." Environmental Chemistry 12, no. 3 (2015): 316. http://dx.doi.org/10.1071/en14154.

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Environmental context Non-methane hydrocarbons play an important role in the formation of photochemical oxidants such as ozone. We investigate factors controlling the distribution of non-methane hydrocarbons in an urban area of the Middle East. The study highlights the importance of local emissions and atmospheric dynamics, and the limited effect of photochemistry at the measurement site. Abstract Measurements of over 70 C2-C16 non-methane hydrocarbons (NMHCs) were conducted in suburban Beirut (1.3 million inhabitants) in summer 2011 and winter 2012 during the Emission and Chemistry of Organic

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24

Snyder, Joshua A., Peter Grüninger, Holger F. Bettinger, and Arthur E. Bragg. "BN Doping and the Photochemistry of Polyaromatic Hydrocarbons: Photocyclization of Hexaphenyl Benzene and Hexaphenyl Borazine." Journal of Physical Chemistry A 121, no. 44 (2017): 8359–67. http://dx.doi.org/10.1021/acs.jpca.7b08190.

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25

Imanaka, Hiroshi, and Mark A. Smith. "EUV Photochemical Production of Unsaturated Hydrocarbons: Implications to EUV Photochemistry in Titan and Jovian Planets†." Journal of Physical Chemistry A 113, no. 42 (2009): 11187–94. http://dx.doi.org/10.1021/jp9041952.

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26

Schachtner, Josef, Patrick Bayer, and Axel Jacobi von Wangelin. "A flow reactor setup for photochemistry of biphasic gas/liquid reactions." Beilstein Journal of Organic Chemistry 12 (August 11, 2016): 1798–811. http://dx.doi.org/10.3762/bjoc.12.170.

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A home-built microreactor system for light-mediated biphasic gas/liquid reactions was assembled from simple commercial components. This paper describes in full detail the nature and function of the required building elements, the assembly of parts, and the tuning and interdependencies of the most important reactor and reaction parameters. Unlike many commercial thin-film and microchannel reactors, the described set-up operates residence times of up to 30 min which cover the typical rates of many organic reactions. The tubular microreactor was successfully applied to the photooxygenation of hyd

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27

Parrington, M., P. I. Palmer, A. C. Lewis, et al. "Ozone photochemistry in boreal biomass burning plumes." Atmospheric Chemistry and Physics Discussions 13, no. 1 (2013): 1795–853. http://dx.doi.org/10.5194/acpd-13-1795-2013.

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Abstract. We present an analysis of ozone photochemistry observed by aircraft measurements of boreal biomass burning plumes over Eastern Canada in the summer of 2011. Measurements of ozone and a number of key chemical species associated with ozone photochemistry, including non-methane hydrocarbons (NMHCs), nitrogen oxides (NOx) and total nitrogen containing species (NOy), were made from the UK FAAM BAe-146 research aircraft as part of the quantifying the impact of BOReal forest fires on tropospheric oxidants over the Atlantic using Aircraft and Satellites (BORTAS) experiment between 12 July an

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28

Cook, Amanda M., Alessandra Ricca, Andrew L. Mattioda, et al. "PHOTOCHEMISTRY OF POLYCYCLIC AROMATIC HYDROCARBONS IN COSMIC WATER ICE: THE ROLE OF PAH IONIZATION AND CONCENTRATION." Astrophysical Journal 799, no. 1 (2015): 14. http://dx.doi.org/10.1088/0004-637x/799/1/14.

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29

Parrington, M., P. I. Palmer, A. C. Lewis, et al. "Ozone photochemistry in boreal biomass burning plumes." Atmospheric Chemistry and Physics 13, no. 15 (2013): 7321–41. http://dx.doi.org/10.5194/acp-13-7321-2013.

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Abstract. We present an analysis of ozone (O3) photochemistry observed by aircraft measurements of boreal biomass burning plumes over eastern Canada in the summer of 2011. Measurements of O3 and a number of key chemical species associated with O3 photochemistry, including non-methane hydrocarbons (NMHCs), nitrogen oxides (NOx) and total nitrogen containing species (NOy), were made from the UK FAAM BAe-146 research aircraft as part of the "quantifying the impact of BOReal forest fires on Tropospheric oxidants over the Atlantic using Aircraft and Satellites" (BORTAS) experiment between 12 July a

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30

Bézard, Bruno. "Spectroscopy of Planetary Atmospheres and Surfaces with ISO." Highlights of Astronomy 12 (2002): 607–10. http://dx.doi.org/10.1017/s1539299600014374.

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AbstractSpectroscopic observations of Solar-System objects with ISO provided a wealth of new and exciting results. Major findings relevant to planetary atmospheres and surfaces are presented here. Rotational lines of HD were observed for the first time in the four giant planets, yielding reliable determinations of the D/H ratio. The14N/15N ratio could also be measured in the upper troposphere of Jupiter. Many new hydrocarbons were detected in the giant planets, improving our understanding of the methane photochemistry. In addition, oxygen compounds (H2O and CO2) were detected in their upper at

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Zhang, Qi, Guoxia Pei, Gengyun Liu, Hanqing Li, and Lihui Gao. "Distribution and Photochemistry of Polycyclic Aromatic Hydrocarbons in the Baotou Section of the Yellow River During Winter." Archives of Environmental Contamination and Toxicology 69, no. 2 (2015): 133–42. http://dx.doi.org/10.1007/s00244-015-0135-x.

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Jonson, J. E., D. Simpson, H. Fagerli, and S. Solberg. "Can we explain the trends in European ozone levels?" Atmospheric Chemistry and Physics 6, no. 1 (2006): 51–66. http://dx.doi.org/10.5194/acp-6-51-2006.

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Abstract. Ozone levels in Europe are changing. Emissions of ozone precursors from Europe (NOx, CO and non-methane hydrocarbons) have been substantially reduced over the last 10–15 years, but changes in ozone levels cannot be explained by changes in European emissions alone. The observed ozone trends at many European sites are only partially reproduced by global or regional photochemistry models, and possible reasons for this are discussed. In order to further explain the European trends in ozone since 1990, the EMEP regional photochemistry model has been run for the years 1990 and 1995–2002. T

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Jonson, J. E., D. Simpson, H. Fagerli, and S. Solberg. "Can we explain the trends in European ozone levels?" Atmospheric Chemistry and Physics Discussions 5, no. 4 (2005): 5957–85. http://dx.doi.org/10.5194/acpd-5-5957-2005.

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Abstract. Ozone levels in Europe are changing. Emissions of ozone precursors from Europe (NOx, CO and non-methane hydrocarbons) have been substantially reduced over the last 10–15 years, but changes in ozone levels can not be explained by changes in European emissions alone. In order to explain the European trends in ozone since 1990 the EMEP regional photochemistry model has been run for the the years 1990 and 1995–2002. The EMEP model is a regional model centered over Europe but the model domain also includes most of the North Atlantic and the polar region. Climatological ozone data are used

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Gladstone, G. Randall, and Leslie A. Young. "New Horizons Observations of the Atmosphere of Pluto." Annual Review of Earth and Planetary Sciences 47, no. 1 (2019): 119–40. http://dx.doi.org/10.1146/annurev-earth-053018-060128.

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New Horizons data provide a snapshot of the current state of Pluto's atmosphere. Winds are slow and mostly controlled by sublimation of surface ices. Molecular nitrogen is the primary constituent below 1,800 km, while methane and carbon monoxide are important minor species. Photolysis of these gases leads to a thin haze that encompasses Pluto from the surface up to >500-km altitude and is important in heating and cooling the atmosphere. A cold (∼70 K) upper atmosphere curtails the escape of Pluto's molecular nitrogen to space, although there is substantial escape of methane (∼5 × 1025 molec

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Crutzen, P. J., M. T. Coffey, A. C. Delany, et al. "Observations of air composition in Brazil between the Equator and 20°s during the dry season." Acta Amazonica 15, no. 1-2 (1985): 77–120. http://dx.doi.org/10.1590/1809-43921985152119.

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Field measurement programs in Brazil during the dry season months of August and September in 1979 and 1980 have demonstrated the great importance of the continental tropics in global air chemistry. Especially in the mixed layer, the air composition over land is much different from that over the ocean and the land areas are clearly longe scale sources of many inportant trace gases. During the dry season much biomass, burning takes place especially in the cerrado regions leading to substantial emission of air pollutants, such as CO, NOx, N2O, CH4 and other hydrocarbons. Ozone concentrations are

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Carrasco, Nathalie, Hervé Cottin, Mégane Cloix, et al. "The AMINO experiment: methane photolysis under Solar VUV irradiation on the EXPOSE-R facility of the International Space Station." International Journal of Astrobiology 14, no. 1 (2014): 79–87. http://dx.doi.org/10.1017/s1473550414000238.

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AbstractThe scientific aim of the present campaign is to study the whole chain of methane photo-degradation, as initiated by Solar vacuum-ultraviolet irradiation in Titan's atmosphere. For this purpose, the AMINO experiment on the EXPOSE-R mission has loaded closed cells for gas-phase photochemistry in space conditions. Two different gas mixtures have been exposed, named Titan 1 and Titan 2, involving both N2–CH4 gas mixtures, without and with CO2, respectively. CO2 is added as a source of reactive oxygen in the cells. The cell contents were analysed thanks to infrared absorption spectroscopy,

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Bonsang, Bernard, Amine Al Aarbaoui, and Jean Sciare. "Diurnal variation of non-methane hydrocarbons in the subantarctic atmosphere." Environmental Chemistry 5, no. 1 (2008): 16. http://dx.doi.org/10.1071/en07018.

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Environmental context. The ocean surface is known to be supersaturated in some non-methane hydrocarbons and particularly alkenes. This oceanic source, though small on a global scale, can be a dominant component of the background atmosphere in remote areas. Attempts have been made to quantify this source, in order to estimate its magnitude in the budgets of these gases in the water column and the atmosphere. A main difficulty is to determine the production processes involved under the effects of plankton activity and solar and UV radiation penetration in the water column. Abstract. Non-methane

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Noble, J. A., E. Michoulier, C. Aupetit, and J. Mascetti. "Influence of ice structure on the soft UV photochemistry of PAHs embedded in solid water." Astronomy & Astrophysics 644 (November 24, 2020): A22. http://dx.doi.org/10.1051/0004-6361/202038568.

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Context. The UV photoreactivity of polycyclic aromatic hydrocarbons (PAHs) in porous amorphous solid water has long been known to form both oxygenated photoproducts and photofragments. Aims. The aim of this study is to examine the influence of ice structure on reactivity under soft UV irradiation conditions. Methods. Mixtures of PAHs with amorphous solid water (porous and compact) and crystalline (cubic and hexagonal) ices were prepared in a high vacuum chamber and irradiated using a mercury lamp for up to 2.5 h. Results. The results show that the production of oxygenated PAHs is efficient onl

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Bézard, Bruno. "Composition and chemistry of Titan's stratosphere." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 367, no. 1889 (2008): 683–95. http://dx.doi.org/10.1098/rsta.2008.0186.

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Our present knowledge of the composition and chemistry of Titan's stratosphere is reviewed. Thermal measurements by the Cassini spacecraft show that the mixing ratios of all photochemical species, except ethylene, increase with altitude at equatorial and southern latitudes, reflecting transport from a high-altitude source to a condensation sink in the lower stratosphere. Most compounds are enriched at latitudes northward of 45° N, a consequence of subsidence in the winter polar vortex. This enrichment is much stronger for nitriles and complex hydrocarbons than for ethane and acetylene. Titan's

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Perring, A. E., T. H. Bertram, D. K. Farmer, et al. "Alkyl nitrate production and persistence in the Mexico City Plume." Atmospheric Chemistry and Physics Discussions 9, no. 6 (2009): 23755–90. http://dx.doi.org/10.5194/acpd-9-23755-2009.

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Abstract. Alkyl and multifunctional nitrates (ΣANs) have been observed to be a significant fraction of NOy in a number of different chemical regimes. Their formation is an important free radical chain termination step ending production of ozone and possibly affecting formation of secondary organic aerosol. ΣANs also represent a potentially large, unmeasured contribution to OH reactivity and are a major pathway for the removal of nitrogen oxides from the atmosphere. Numerous studies have investigated the role of nitrate formation from biogenic compounds. Less attention has been paid to the role

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Perring, A. E., T. H. Bertram, D. K. Farmer та ін. "The production and persistence of ΣRONO<sub>2</sub> in the Mexico City plume". Atmospheric Chemistry and Physics 10, № 15 (2010): 7215–29. http://dx.doi.org/10.5194/acp-10-7215-2010.

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Abstract. Alkyl and multifunctional nitrates (RONO2, ΣANs) have been observed to be a significant fraction of NOy in a number of different chemical regimes. Their formation is an important free radical chain termination step ending production of ozone and possibly affecting formation of secondary organic aerosol. ΣANs also represent a potentially large, unmeasured contribution to OH reactivity and are a major pathway for the removal of nitrogen oxides from the atmosphere. Numerous studies have investigated the role of nitrate formation from biogenic compounds and in the remote atmosphere. Less

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42

Choi, W., I. C. Faloona, N. C. Bouvier-Brown, et al. "Observations of elevated formaldehyde over a forest canopy suggest missing sources from rapid oxidation of arboreal hydrocarbons." Atmospheric Chemistry and Physics Discussions 10, no. 4 (2010): 9839–93. http://dx.doi.org/10.5194/acpd-10-9839-2010.

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Abstract. To better understand the processing of biogenic VOCs (BVOCs) in the pine forests of the U.S. Sierra Nevada, we measured HCHO at Blodgett Research Station using Quantum Cascade Laser Spectroscopy (QCLS) during the Biosphere Effects on Aerosols and Photochemistry Experiment (BEARPEX) of late summer 2007. Four days of the experiment exhibited particularly copious HCHO, with midday peaks between 15–20 ppbv, while the other days developed delayed maxima between 8–14 ppbv in the early evening. From the expansive photochemical data set, we attempt to explain the observed HCHO concentrations

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Choi, W., I. C. Faloona, N. C. Bouvier-Brown, et al. "Observations of elevated formaldehyde over a forest canopy suggest missing sources from rapid oxidation of arboreal hydrocarbons." Atmospheric Chemistry and Physics 10, no. 18 (2010): 8761–81. http://dx.doi.org/10.5194/acp-10-8761-2010.

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Abstract. To better understand the processing of biogenic VOCs (BVOCs) in the pine forests of the US Sierra Nevada, we measured HCHO at Blodgett Research Station using Quantum Cascade Laser Spectroscopy (QCLS) during the Biosphere Effects on Aerosols and Photochemistry Experiment (BEARPEX) of late summer 2007. Four days of the experiment exhibited particularly copious HCHO, with midday peaks between 15–20 ppbv, while the other days developed delayed maxima between 8–14 ppbv in the early evening. From the expansive photochemical data set, we attempt to explain the observed HCHO concentrations b

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Finch, D. P., P. I. Palmer, and M. Parrington. "Origin, variability and age of biomass burning plumes intercepted during BORTAS-B." Atmospheric Chemistry and Physics Discussions 14, no. 6 (2014): 8723–52. http://dx.doi.org/10.5194/acpd-14-8723-2014.

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Abstract. We use the GEOS-Chem atmospheric chemistry transport model to interpret aircraft measurements of carbon monoxide (CO) in biomass burning outflow taken during the 2011 BORTAS-B campaign over eastern Canada. The model has some skill reproducing the observed variability (r = 0.45) but has a negative bias for observations below 100 ppb and a positive bias above 300 ppb. We find that observed CO variations are largely due to NW North American biomass burning, as expected, with smaller and less variable contributions from fossil fuel combustion from eastern Asia and NE North America. To he

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Pugliese, Silvia, Malte Frydenlund Jespersen, Jakob Boyd Pernov, et al. "Chemical analysis and origin of the smell of line-dried laundry." Environmental Chemistry 17, no. 5 (2020): 355. http://dx.doi.org/10.1071/en19206.

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Environmental contextThe fresh pleasant smell of laundry dried outside in sunlight is recognised by most people, but despite decades of speculation the origin of the smell has not been demonstrated. We show that the smell of line-dried laundry is due to the unique combination of traces of atmospheric hydrocarbons, sunlight and a wet fabric surface. This surface photochemistry is likely to be widespread in the environment on surfaces of natural materials. AbstractIn this study, we find that the drying method is the key element in generating the well-known fresh scent of line-dried laundry, whic

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Finch, D. P., P. I. Palmer, and M. Parrington. "Origin, variability and age of biomass burning plumes intercepted during BORTAS-B." Atmospheric Chemistry and Physics 14, no. 24 (2014): 13789–800. http://dx.doi.org/10.5194/acp-14-13789-2014.

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Abstract. We use the GEOS-Chem atmospheric chemistry transport model to interpret aircraft measurements of carbon monoxide (CO) in biomass burning outflow taken during the 2011 BORTAS-B campaign over eastern Canada. The model has some skill reproducing the observed variability, with a Spearman's rank correlation rs = 0.65, but has a positive negative bias for observations <100 ppb and a negative bias for observations > 300 ppb. We find that observed CO variations are largely due to fires over Ontario, as expected, with smaller and less variable contributions from fossil fuel combustion f

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Greenberg, J. P., D. Helmig, and P. R. Zimmerman. "Seasonal measurements of nonmethane hydrocarbons and carbon monoxide at the Mauna Loa Observatory during the Mauna Loa Observatory Photochemistry Experiment 2." Journal of Geophysical Research: Atmospheres 101, no. D9 (1996): 14581–98. http://dx.doi.org/10.1029/95jd01543.

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Wolfe, G. M., C. Cantrell, S. Kim, et al. "Missing peroxy radical sources within a rural forest canopy." Atmospheric Chemistry and Physics Discussions 13, no. 12 (2013): 31713–59. http://dx.doi.org/10.5194/acpd-13-31713-2013.

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Abstract. Organic peroxy (RO2) and hydroperoxy (HO2) radicals are key intermediates in the photochemical processes that generate ozone, secondary organic aerosol and reactive nitrogen reservoirs throughout the troposphere. In regions with ample biogenic hydrocarbons, the richness and complexity of peroxy radical chemistry presents a significant challenge to current-generation models, especially given the scarcity of measurements in such environments. We present peroxy radical observations acquired within a Ponderosa pine forest during the summer 2010 Bio-hydro-atmosphere interactions of Energy

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Lee-Taylor, J., S. Madronich, B. Aumont, et al. "Explicit modeling of organic chemistry and secondary organic aerosol partitioning for Mexico City and its outflow plume." Atmospheric Chemistry and Physics 11, no. 24 (2011): 13219–41. http://dx.doi.org/10.5194/acp-11-13219-2011.

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Abstract. The evolution of organic aerosols (OA) in Mexico City and its outflow is investigated with the nearly explicit gas phase photochemistry model GECKO-A (Generator of Explicit Chemistry and Kinetics of Organics in the Atmosphere), wherein precursor hydrocarbons are oxidized to numerous intermediate species for which vapor pressures are computed and used to determine gas/particle partitioning in a chemical box model. Precursor emissions included observed C3-10 alkanes, alkenes, and light aromatics, as well as larger n-alkanes (up to C25) not directly observed but estimated by scaling to

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Wolfe, G. M., C. Cantrell, S. Kim, et al. "Missing peroxy radical sources within a summertime ponderosa pine forest." Atmospheric Chemistry and Physics 14, no. 9 (2014): 4715–32. http://dx.doi.org/10.5194/acp-14-4715-2014.

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Abstract. Organic peroxy (RO2) and hydroperoxy (HO2) radicals are key intermediates in the photochemical processes that generate ozone, secondary organic aerosol and reactive nitrogen reservoirs throughout the troposphere. In regions with ample biogenic hydrocarbons, the richness and complexity of peroxy radical chemistry presents a significant challenge to current-generation models, especially given the scarcity of measurements in such environments. We present peroxy radical observations acquired within a ponderosa pine forest during the summer 2010 Bio-hydro-atmosphere interactions of Energy

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