Zobrazeno 1 - 10
of 36
pro vyhledávání: '"H. D. Osthoff"'
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 311-322 (2023)
The Henry's law solubility (HS) and liquid-phase loss rate constants (kl) of the tropospheric trace gas constituents peroxyacetic nitric anhydride (PAN; CH3C(O)O2NO2, commonly known as peroxyacetyl nitrate) and peroxypropionic nitric anhydride (PPN;
Externí odkaz:
https://doaj.org/article/515e03c5f5364ec4bf43dfee5e27c830
Autor:
N. J. Gingerysty, H. D. Osthoff
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 4159-4167 (2020)
A well-characterized source of nitrous acid vapour (HONO) is essential for accurate ambient air measurements by instruments requiring external calibration. In this work, a compact HONO source is described in which gas streams containing dilute concen
Externí odkaz:
https://doaj.org/article/0608dd3d507949b0a40706c233d2bed2
Autor:
Z. Y. W. Davis, U. Frieß, K. B. Strawbridge, M. Aggarwaal, S. Baray, E. G. Schnitzler, A. Lobo, V. E. Fioletov, I. Abboud, C. A. McLinden, J. Whiteway, M. D. Willis, A. K. Y. Lee, J. Brook, J. Olfert, J. O'Brien, R. Staebler, H. D. Osthoff, C. Mihele, R. McLaren
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 1129-1155 (2020)
Vertical profiles of aerosols, NO2, and SO2 were retrieved from Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) measurements at a field site in northern Alberta, Canada, during August and September 2013. The site is approximately 1
Externí odkaz:
https://doaj.org/article/bb42ea68b3b3475b88a24cd2cb1e8bb0
Autor:
N. Jordan, H. D. Osthoff
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 273-285 (2020)
This work describes an incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) instrument for quantification of HONO and NO2 mixing ratios in ambient air. The instrument is operated in the near-ultraviolet spectral region between 361 a
Externí odkaz:
https://doaj.org/article/6e399d2d90d74395be8eb3f23d9c0085
Autor:
A. K. Y. Lee, M. G. Adam, J. Liggio, S.-M. Li, K. Li, M. D. Willis, J. P. D. Abbatt, T. W. Tokarek, C. A. Odame-Ankrah, H. D. Osthoff, K. Strawbridge, J. R. Brook
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 12209-12219 (2019)
The oil sands industry in Alberta, Canada, represents a large anthropogenic source of secondary organic aerosol (SOA). Atmospheric emissions from oil sands operations are a complex mixture of gaseous and particulate pollutants. Their interaction can
Externí odkaz:
https://doaj.org/article/8e896390fc2d422dad2431bdaaeaef81
Publikováno v:
Atmospheric Measurement Techniques, Vol 12, Pp 1277-1293 (2019)
An incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) instrument for quantification of atmospheric trace gases that absorb in the cyan region of the electromagnetic spectrum (470 to 540 nm), including NO2 and I2, is described. T
Externí odkaz:
https://doaj.org/article/6b2a779132f441fa988c508259c370bd
Autor:
T. W. Tokarek, C. A. Odame-Ankrah, J. A. Huo, R. McLaren, A. K. Y. Lee, M. G. Adam, M. D. Willis, J. P. D. Abbatt, C. Mihele, A. Darlington, R. L. Mittermeier, K. Strawbridge, K. L. Hayden, J. S. Olfert, E. G. Schnitzler, D. K. Brownsey, F. V. Assad, G. R. Wentworth, A. G. Tevlin, D. E. J. Worthy, S.-M. Li, J. Liggio, J. R. Brook, H. D. Osthoff
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 17819-17841 (2018)
In this paper, measurements of air pollutants made at a ground site near Fort McKay in the Athabasca oil sands region as part of a multi-platform campaign in the summer of 2013 are presented. The observations included measurements of selected volatil
Externí odkaz:
https://doaj.org/article/2eab12a88abc4b098e8a96e2df2b00c9
Publikováno v:
Atmospheric Measurement Techniques, Vol 11, Pp 4109-4127 (2018)
Peroxy and peroxyacyl nitrates (PNs and PANs) are important trace gas constituents of the troposphere which are challenging to quantify by differential thermal dissociation with NO2 detection in polluted (i.e., high-NOx) environments. In this pape
Externí odkaz:
https://doaj.org/article/f399f22371e3483dbb4732fcf89d6a0c
Autor:
N. Amiri, R. Ghahremaninezhad, O. Rempillo, T. W. Tokarek, C. A. Odame-Ankrah, H. D. Osthoff, A.-L. Norman
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 7757-7780 (2018)
Concentrations and δ34S values for SO2 and size-segregated sulfate aerosols were determined for air monitoring station 13 (AMS 13) at Fort MacKay in the Athabasca oil sands region, northeastern Alberta, Canada as part of the Joint Canada-Alberta
Externí odkaz:
https://doaj.org/article/efb6f3b428bc4f4e81e943df1d3a0b99
Autor:
H. D. Osthoff, C. A. Odame-Ankrah, Y. M. Taha, T. W. Tokarek, C. L. Schiller, D. Haga, K. Jones, R. Vingarzan
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 6293-6315 (2018)
The nocturnal nitrogen oxides, which include the nitrate radical (NO3), dinitrogen pentoxide (N2O5), and its uptake product on chloride containing aerosol, nitryl chloride (ClNO2), can have profound impacts on the lifetime of NOx ( = NO + NO2), ra
Externí odkaz:
https://doaj.org/article/b1701363f4074f2680090ef0a0da9c55