Zobrazeno 1 - 10
of 1 489
pro vyhledávání: '"F. Holland"'
Autor:
C. Cho, H. Fuchs, A. Hofzumahaus, F. Holland, W. J. Bloss, B. Bohn, H.-P. Dorn, M. Glowania, T. Hohaus, L. Liu, P. S. Monks, D. Niether, F. Rohrer, R. Sommariva, Z. Tan, R. Tillmann, A. Kiendler-Scharr, A. Wahner, A. Novelli
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 2003-2033 (2023)
Photochemical processes in ambient air were studied using the atmospheric simulation chamber SAPHIR at Forschungszentrum Jülich, Germany. Ambient air was continuously drawn into the chamber through a 50 m high inlet line and passed through the chamb
Externí odkaz:
https://doaj.org/article/e60adc2ad2594ef3990465d4cc8130d3
Autor:
Z. Tan, H. Fuchs, A. Hofzumahaus, W. J. Bloss, B. Bohn, C. Cho, T. Hohaus, F. Holland, C. Lakshmisha, L. Liu, P. S. Monks, A. Novelli, D. Niether, F. Rohrer, R. Tillmann, T. S. E. Valkenburg, V. Vardhan, A. Kiendler-Scharr, A. Wahner, R. Sommariva
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 13137-13152 (2022)
Ambient measurements of nitryl chloride (ClNO2) were performed at a rural site in Germany, covering three periods in winter, summer, and autumn 2019, as part of the JULIAC campaign (Jülich Atmospheric Chemistry Project) that aimed to understand the
Externí odkaz:
https://doaj.org/article/8055e684fcc7485aaaaacefbda26d83a
Autor:
M. Glowania, F. Rohrer, H.-P. Dorn, A. Hofzumahaus, F. Holland, A. Kiendler-Scharr, A. Wahner, H. Fuchs
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 4239-4253 (2021)
Three instruments that use different techniques to measure gaseous formaldehyde (HCHO) concentrations were compared in experiments in the atmospheric simulation chamber SAPHIR at Forschungszentrum Jülich. One instrument (AL4021, Aero-Laser GmbH) det
Externí odkaz:
https://doaj.org/article/b0c719bd678d4469b5ddea00f6aa325e
Autor:
C. Cho, A. Hofzumahaus, H. Fuchs, H.-P. Dorn, M. Glowania, F. Holland, F. Rohrer, V. Vardhan, A. Kiendler-Scharr, A. Wahner, A. Novelli
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 1851-1877 (2021)
Precise and accurate hydroxyl radical (OH) measurements are essential to investigate mechanisms for oxidation and transformation of trace gases and processes leading to the formation of secondary pollutants like ozone (O3) in the troposphere. Laser-i
Externí odkaz:
https://doaj.org/article/4a44d65fd5124ecd8402e43c409448c5
Autor:
M. Rolletter, M. Blocquet, M. Kaminski, B. Bohn, H.-P. Dorn, A. Hofzumahaus, F. Holland, X. Li, F. Rohrer, R. Tillmann, R. Wegener, A. Kiendler-Scharr, A. Wahner, H. Fuchs
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 13701-13719 (2020)
The photooxidation of pinonaldehyde, one product of the α-pinene degradation, was investigated in the atmospheric simulation chamber SAPHIR under natural sunlight at low NO concentrations ( ppbv) with and without an added hydroxyl radical (OH) sca
Externí odkaz:
https://doaj.org/article/e581506e7a4341a6839588c4a10d335d
Autor:
A. Novelli, L. Vereecken, B. Bohn, H.-P. Dorn, G. I. Gkatzelis, A. Hofzumahaus, F. Holland, D. Reimer, F. Rohrer, S. Rosanka, D. Taraborrelli, R. Tillmann, R. Wegener, Z. Yu, A. Kiendler-Scharr, A. Wahner, H. Fuchs
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 3333-3355 (2020)
Theoretical, laboratory, and chamber studies have shown fast regeneration of the hydroxyl radical (OH) in the photochemistry of isoprene, largely due to unimolecular reactions which were previously thought not to be important under atmospheric condit
Externí odkaz:
https://doaj.org/article/0454a644f2bb47aaa5e154a5b050d7d9
Autor:
Z. Tan, K. Lu, A. Hofzumahaus, H. Fuchs, B. Bohn, F. Holland, Y. Liu, F. Rohrer, M. Shao, K. Sun, Y. Wu, L. Zeng, Y. Zhang, Q. Zou, A. Kiendler-Scharr, A. Wahner
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 7129-7150 (2019)
Hydroxyl (OH) and peroxy radicals (HO2 and RO2) were measured in the Pearl River Delta, which is one of the most polluted areas in China, in autumn 2014. The radical observations were complemented by measurements of OH reactivity (inverse OH lifetime
Externí odkaz:
https://doaj.org/article/fe97faf728ad4049bf222d84d6ef77ca
Autor:
Z. Tan, F. Rohrer, K. Lu, X. Ma, B. Bohn, S. Broch, H. Dong, H. Fuchs, G. I. Gkatzelis, A. Hofzumahaus, F. Holland, X. Li, Y. Liu, A. Novelli, M. Shao, H. Wang, Y. Wu, L. Zeng, M. Hu, A. Kiendler-Scharr, A. Wahner, Y. Zhang
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 12391-12411 (2018)
The first wintertime in situ measurements of hydroxyl (OH), hydroperoxy (HO2) and organic peroxy (RO2) radicals (ROx = OH + HO2 + RO2) in combination with observations of total reactivity of OH radicals, kOH in Beijing are presented. The field c
Externí odkaz:
https://doaj.org/article/443117b28ed54578afe921d6fdbe7848
Autor:
A. Novelli, M. Kaminski, M. Rolletter, I.-H. Acir, B. Bohn, H.-P. Dorn, X. Li, A. Lutz, S. Nehr, F. Rohrer, R. Tillmann, R. Wegener, F. Holland, A. Hofzumahaus, A. Kiendler-Scharr, A. Wahner, H. Fuchs
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 11409-11422 (2018)
Several previous field studies have reported unexpectedly large concentrations of hydroxyl and hydroperoxyl radicals (OH and HO2, respectively) in forested environments that could not be explained by the traditional oxidation mechanisms that large
Externí odkaz:
https://doaj.org/article/ae3fa84b7edf490ebfd5ffdd1c99a049
Autor:
H. Fuchs, S. Albrecht, I. Acir, B. Bohn, M. Breitenlechner, H.-P. Dorn, G. I. Gkatzelis, A. Hofzumahaus, F. Holland, M. Kaminski, F. N. Keutsch, A. Novelli, D. Reimer, F. Rohrer, R. Tillmann, L. Vereecken, R. Wegener, A. Zaytsev, A. Kiendler-Scharr, A. Wahner
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 8001-8016 (2018)
The photooxidation of methyl vinyl ketone (MVK) was investigated in the atmospheric simulation chamber SAPHIR for conditions at which organic peroxy radicals (RO2) mainly reacted with NO (high NO case) and for conditions at which other reaction ch
Externí odkaz:
https://doaj.org/article/8e0d33ff53124596b9eeeafd884bfaa6