Zobrazeno 1 - 10
of 220
pro vyhledávání: '"J. N. Smith"'
Autor:
X. Li, Y. Chen, Y. Li, R. Cai, C. Deng, J. Wu, C. Yan, H. Cheng, Y. Liu, M. Kulmala, J. Hao, J. N. Smith, J. Jiang
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 14801-14812 (2023)
Understanding the composition and sources of atmospheric ultrafine particles (UFPs) is essential in evaluating their exposure risks. It requires long-term measurements with high time resolution, which are scarce to date. We performed near-continuous
Externí odkaz:
https://doaj.org/article/ce7277ead2094e6682c1d080e82a46df
Autor:
D. C. Myers, S. Kim, S. Sjostedt, A. B. Guenther, R. Seco, O. Vega Bustillos, J. Tota, R. A. F. Souza, J. N. Smith
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 10061-10076 (2022)
Sulfuric acid is a key contributor to new particle formation, though measurements of its gaseous concentrations are difficult to make. Several parameterizations to estimate sulfuric acid exist, all of which were constructed using measurements from th
Externí odkaz:
https://doaj.org/article/ab29888211d44e9cabaf13035b66daad
Observations of gas-phase products from the nitrate-radical-initiated oxidation of four monoterpenes
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 9017-9031 (2022)
Chemical ionization mass spectrometry with the nitrate reagent ion (NO3- CIMS) was used to investigate the products of the nitrate radical (NO3) initiated oxidation of four monoterpenes in laboratory chamber experiments. α-Pinene, β-pinene, Δ-3-ca
Externí odkaz:
https://doaj.org/article/50da14e12d794bdf8626744a6f3f614c
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 11637-11654 (2021)
Acid–base clusters and stable salt formation are critical drivers of new particle formation events in the atmosphere. In this study, we explore salt heterodimer (a cluster of one acid and one base) stability as a function of gas-phase acidity, aque
Externí odkaz:
https://doaj.org/article/20f75bec28e745aaa0c7376fcc639b77
Publikováno v:
Ocean Science, Vol 17, Pp 111-129 (2021)
The inflow of Atlantic Water to the Arctic Ocean is a crucial determinant for the future trajectory of this ocean basin with regard to warming, loss of sea ice, and ocean acidification. Yet many details of the fate and circulation of these waters wit
Externí odkaz:
https://doaj.org/article/4a66a8057ce54b8ca458c092f1e64d3a
Autor:
H. S. Glicker, M. J. Lawler, J. Ortega, S. S. de Sá, S. T. Martin, P. Artaxo, O. Vega Bustillos, R. de Souza, J. Tota, A. Carlton, J. N. Smith
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 13053-13066 (2019)
Central Amazonia serves as an ideal location to study atmospheric particle formation, since it often represents nearly natural, pre-industrial conditions but can also experience periods of anthropogenic influence due to the presence of emissions from
Externí odkaz:
https://doaj.org/article/42b67119ad2b41fda485980e36eacbae
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 9753-9768 (2019)
In atmospheric sulfuric-acid-driven particle formation, bases are able to stabilize the initial molecular clusters and thus enhance particle formation. The enhancing potential of a stabilizing base is affected by different factors, such as the basici
Externí odkaz:
https://doaj.org/article/80f1d5dffaa64f53b7134bd8587b43df
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 1555-1570 (2019)
It has been widely observed around the world that the frequency and intensity of new particle formation (NPF) events are reduced during periods of high relative humidity (RH). The current study focuses on how RH affects the formation of highly oxidiz
Externí odkaz:
https://doaj.org/article/f9e1a7fda0a84631a8f33e09a2d611dc
Autor:
A. L. Hodshire, B. B. Palm, M. L. Alexander, Q. Bian, P. Campuzano-Jost, E. S. Cross, D. A. Day, S. S. de Sá, A. B. Guenther, A. Hansel, J. F. Hunter, W. Jud, T. Karl, S. Kim, J. H. Kroll, J.-H. Park, Z. Peng, R. Seco, J. N. Smith, J. L. Jimenez, J. R. Pierce
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 12433-12460 (2018)
Oxidation flow reactors (OFRs) allow the concentration of a given atmospheric oxidant to be increased beyond ambient levels in order to study secondary organic aerosol (SOA) formation and aging over varying periods of equivalent aging by that oxid
Externí odkaz:
https://doaj.org/article/90a63e18220c4aafb1dc38a56236cec5
Autor:
N. Sarnela, T. Jokinen, J. Duplissy, C. Yan, T. Nieminen, M. Ehn, S. Schobesberger, M. Heinritzi, S. Ehrhart, K. Lehtipalo, J. Tröstl, M. Simon, A. Kürten, M. Leiminger, M. J. Lawler, M. P. Rissanen, F. Bianchi, A. P. Praplan, J. Hakala, A. Amorim, M. Gonin, A. Hansel, J. Kirkby, J. Dommen, J. Curtius, J. N. Smith, T. Petäjä, D. R. Worsnop, M. Kulmala, N. M. Donahue, M. Sipilä
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 2363-2380 (2018)
Atmospheric oxidation is an important phenomenon which produces large quantities of low-volatility compounds such as sulfuric acid and oxidized organic compounds. Such species may be involved in the nucleation of particles and enhance their subseq
Externí odkaz:
https://doaj.org/article/03818ae29fe64366911761d38cb74158