Zobrazeno 1 - 10
of 25
pro vyhledávání: '"J. Kleffman"'
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 5533-5550 (2023)
Measurements of atmospheric nitrous acid (HONO) amount fraction and flux density above snow were carried out using a long-path absorption photometer at Halley station in coastal Antarctica between 22 January and 3 February 2022. The mean ±1σ HONO a
Externí odkaz:
https://doaj.org/article/0874a03832f84aab9d14f8a0f3a72ecc
Autor:
C. Xue, C. Ye, J. Kleffmann, C. Zhang, V. Catoire, F. Bao, A. Mellouki, L. Xue, J. Chen, K. Lu, Y. Zhao, H. Liu, Z. Guo, Y. Mu
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 3149-3167 (2022)
A comprehensive field campaign, with measurements of HONO and related parameters, was conducted in summer 2018 at the foot (150 m a.s.l.) and the summit (1534 m a.s.l.) of Mt. Tai (Shandong province, China). At the summit station, high HONO mixing ra
Externí odkaz:
https://doaj.org/article/0ab49964f54948d09a34754d8569256d
Publikováno v:
Atmospheric Measurement Techniques, Vol 15, Pp 1983-2000 (2022)
In the present study a relaxed eddy accumulation (REA) system for the quantification of vertical fluxes of nitrous acid (HONO) was developed and tested. The system is based on a three-channel long-path absorption photometer (LOPAP) instrument, for wh
Externí odkaz:
https://doaj.org/article/c6160efefd384e52918a110867a6be2b
Autor:
G. Villena, J. Kleffmann
Publikováno v:
Atmospheric Measurement Techniques, Vol 15, Pp 627-637 (2022)
A continuous source for the generation of pure HONO mixtures was developed and characterized, which is based on the Henry's law solubility of HONO in acidic aqueous solutions. With the help of a peristaltic pump, diluted nitrite and sulfuric acid sol
Externí odkaz:
https://doaj.org/article/4c455595337f4aabbf8c20f6711bcc85
Autor:
C. Xue, C. Ye, J. Kleffmann, W. Zhang, X. He, P. Liu, C. Zhang, X. Zhao, C. Liu, Z. Ma, J. Liu, J. Wang, K. Lu, V. Catoire, A. Mellouki, Y. Mu
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 1035-1057 (2022)
In the summer of 2018, a comprehensive field campaign, with measurements on HONO and related parameters, was conducted at the foot (150 m a.s.l.) and the summit of Mt. Tai (1534 m a.s.l.) in the central North China Plain (NCP). With the implementatio
Externí odkaz:
https://doaj.org/article/ddd95c1b7b0a4bfdbd74df2acf942d90
Publikováno v:
Hydrology and Earth System Sciences, Vol 22, Pp 1135-1155 (2018)
The Dead Sea is a terminal lake, located in an arid environment. Evaporation is the key component of the Dead Sea water budget and accounts for the main loss of water. So far, lake evaporation has been determined by indirect methods only and not m
Externí odkaz:
https://doaj.org/article/c67a9c16bb1549e28f316c4347e8ebe5
Autor:
L. K. Whalley, D. Stone, R. Dunmore, J. Hamilton, J. R. Hopkins, J. D. Lee, A. C. Lewis, P. Williams, J. Kleffmann, S. Laufs, R. Woodward-Massey, D. E. Heard
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 2547-2571 (2018)
Measurements of OH, HO2, RO2i (alkene and aromatic-related RO2) and total RO2 radicals taken during the ClearfLo campaign in central London in the summer of 2012 are presented. A photostationary steady-state calculation of OH which considered meas
Externí odkaz:
https://doaj.org/article/4eeade2d08a4414682e843368a19c9a3
Autor:
S. Laufs, M. Cazaunau, P. Stella, R. Kurtenbach, P. Cellier, A. Mellouki, B. Loubet, J. Kleffmann
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Pp 6907-6923 (2017)
Nitrous acid (HONO) fluxes were measured above an agricultural field site near Paris during different seasons. Above bare soil, different crops were measured using the aerodynamic gradient (AG) method. Two LOPAPs (LOng Path Absorption Photometer)
Externí odkaz:
https://doaj.org/article/15050e333c364649adabd2903c597a5f
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 14285-14295 (2016)
Particulate matter (PM) and nitrogen oxides NOx (NOx = NO2+ NO) are key species for urban air quality in Europe and are emitted by mobile sources. According to European recommendations, a significant fraction of road freight should be shifted to wa
Externí odkaz:
https://doaj.org/article/ca3b2377b61e4262af99caade724dfb7
Autor:
J. D. Lee, L. K. Whalley, D. E. Heard, D. Stone, R. E. Dunmore, J. F. Hamilton, D. E. Young, J. D. Allan, S. Laufs, J. Kleffmann
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 2747-2764 (2016)
Measurements of HONO were carried out at an urban background site near central London as part of the Clean air for London (ClearfLo) project in summer 2012. Data were collected from 22 July to 18 August 2014, with peak values of up to 1.8 ppbV at
Externí odkaz:
https://doaj.org/article/299c15a7322a452eadfd3fb927efc0e4