Výsledky vyhledávání

Akademický článek

Ch3MS-RF: a random forest model for chemical characterization and improved quantification of unidentified atmospheric organics detected by chromatography–mass spectrometry techniques

Autor: E. B. Franklin, L. D. Yee, B. Aumont, R. J. Weber, P. Grigas, A. H. Goldstein

Publikováno v: Atmospheric Measurement Techniques, Vol 15, Pp 3779-3803 (2022)

The chemical composition of ambient organic aerosols plays a critical role in driving their climate and health-relevant properties and holds important clues to the sources and formation mechanisms of secondary aerosol material. In most ambient atmosp

Externí odkaz: https://doaj.org/article/372c556193bb491e9faf635087153019

Zobrazit plný text záznamu

Plný text ve formátu HTML

Akademický článek

Contributions of biomass-burning, urban, and biogenic emissions to the concentrations and light-absorbing properties of particulate matter in central Amazonia during the dry season

Autor: S. S. de Sá, L. V. Rizzo, B. B. Palm, P. Campuzano-Jost, D. A. Day, L. D. Yee, R. Wernis, G. Isaacman-VanWertz, J. Brito, S. Carbone, Y. J. Liu, A. Sedlacek, S. Springston, A. H. Goldstein, H. M. J. Barbosa, M. L. Alexander, P. Artaxo, J. L. Jimenez, S. T. Martin

Publikováno v: Atmospheric Chemistry and Physics, Vol 19, Pp 7973-8001 (2019)

Urbanization and deforestation have important impacts on atmospheric particulate matter (PM) over Amazonia. This study presents observations and analysis of PM1 concentration, composition, and optical properties in central Amazonia during the dry sea

Externí odkaz: https://doaj.org/article/f25fb7ee86754c8aa9818712f4c26eed

Zobrazit plný text záznamu

Akademický článek

Urban influence on the concentration and composition of submicron particulate matter in central Amazonia

Publikováno v: Atmospheric Chemistry and Physics, Vol 18, Pp 12185-12206 (2018)

An understanding of how anthropogenic emissions affect the concentrations and composition of airborne particulate matter (PM) is fundamental to quantifying the influence of human activities on climate and air quality. The central Amazon Basin, esp

Externí odkaz: https://doaj.org/article/f31841469dfc4fdb85b12edcd6c091a0

Zobrazit plný text záznamu

Akademický článek

Observations of sesquiterpenes and their oxidation products in central Amazonia during the wet and dry seasons

Publikováno v: Atmospheric Chemistry and Physics, Vol 18, Pp 10433-10457 (2018)

Biogenic volatile organic compounds (BVOCs) from the Amazon forest region represent the largest source of organic carbon emissions to the atmosphere globally. These BVOC emissions dominantly consist of volatile and intermediate-volatility terpenoi

Externí odkaz: https://doaj.org/article/f420a614ae7641f08455caea48dd601c

Zobrazit plný text záznamu

Akademický článek

Secondary organic aerosol formation from ambient air in an oxidation flow reactor in central Amazonia

Publikováno v: Atmospheric Chemistry and Physics, Vol 18, Pp 467-493 (2018)

Secondary organic aerosol (SOA) formation from ambient air was studied using an oxidation flow reactor (OFR) coupled to an aerosol mass spectrometer (AMS) during both the wet and dry seasons at the Observations and Modeling of the Green Ocean Amaz

Externí odkaz: https://doaj.org/article/6b8d0bc528824232a2ff1919fed137ed

Zobrazit plný text záznamu

Akademický článek

Influence of urban pollution on the production of organic particulate matter from isoprene epoxydiols in central Amazonia

Publikováno v: Atmospheric Chemistry and Physics, Vol 17, Pp 6611-6629 (2017)

The atmospheric chemistry of isoprene contributes to the production of a substantial mass fraction of the particulate matter (PM) over tropical forests. Isoprene epoxydiols (IEPOX) produced in the gas phase by the oxidation of isoprene under HO2-d

Externí odkaz: https://doaj.org/article/07de0f932eb9432a965f004cb0877a9a

Zobrazit plný text záznamu

Akademický článek

Characterization of a real-time tracer for isoprene epoxydiols-derived secondary organic aerosol (IEPOX-SOA) from aerosol mass spectrometer measurements

Publikováno v: Atmospheric Chemistry and Physics, Vol 15, Iss 20, Pp 11807-11833 (2015)

Substantial amounts of secondary organic aerosol (SOA) can be formed from isoprene epoxydiols (IEPOX), which are oxidation products of isoprene mainly under low-NO conditions. Total IEPOX-SOA, which may include SOA formed from other parallel isoprene

Externí odkaz: https://doaj.org/article/e87b1f08827c4a0381bc67518663aad7

Zobrazit plný text záznamu

Akademický článek

Online derivatization for hourly measurements of gas- and particle-phase semi-volatile oxygenated organic compounds by thermal desorption aerosol gas chromatography (SV-TAG)

Autor: G. Isaacman, N. M. Kreisberg, L. D. Yee, D. R. Worton, A. W. H. Chan, J. A. Moss, S. V. Hering, A. H. Goldstein

Publikováno v: Atmospheric Measurement Techniques, Vol 7, Iss 12, Pp 4417-4429 (2014)

Laboratory oxidation studies have identified a large number of oxygenated organic compounds that can be used as tracers to understand sources and oxidation chemistry of atmospheric particulate matter. Quantification of these compounds in ambient envi

Externí odkaz: https://doaj.org/article/5d0682c9f5094767bc6e5838b7838bad

Zobrazit plný text záznamu

Akademický článek

Secondary organic aerosol yields of 12-carbon alkanes

Autor: C. L. Loza, J. S. Craven, L. D. Yee, M. M. Coggon, R. H. Schwantes, M. Shiraiwa, X. Zhang, K. A. Schilling, N. L. Ng, M. R. Canagaratna, P. J. Ziemann, R. C. Flagan, J. H. Seinfeld

Publikováno v: Atmospheric Chemistry and Physics, Vol 14, Iss 3, Pp 1423-1439 (2014)

Secondary organic aerosol (SOA) yields were measured for cyclododecane, hexylcyclohexane, n-dodecane, and 2-methylundecane under high-NOx conditions, in which alkyl proxy radicals (RO2) react primarily with NO, and under low-NOx conditions, in which

Externí odkaz: https://doaj.org/article/7d1a2da4c5ec4404985d6570ec879592

Zobrazit plný text záznamu

Akademický článek

Effect of chemical structure on secondary organic aerosol formation from C12 alkanes

Autor: L. D. Yee, J. S. Craven, C. L. Loza, K. A. Schilling, N. L. Ng, M. R. Canagaratna, P. J. Ziemann, R. C. Flagan, J. H. Seinfeld

Publikováno v: Atmospheric Chemistry and Physics, Vol 13, Iss 21, Pp 11121-11140 (2013)

The secondary organic aerosol (SOA) formation from four C12 alkanes (n-dodecane, 2-methylundecane, hexylcyclohexane, and cyclododecane) is studied in the Caltech Environmental Chamber under low-NOx conditions, in which the principal fate of the perox

Externí odkaz: https://doaj.org/article/eaa2fc96d88d475285b20451dc2033ed

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání