Zobrazeno 1 - 10
of 64
pro vyhledávání: '"J. Schuladen"'
Autor:
S. T. Andersen, M. R. McGillen, C. Xue, T. Seubert, P. Dewald, G. N. T. E. Türk, J. Schuladen, C. Denjean, J.-C. Etienne, O. Garrouste, M. Jamar, S. Harb, M. Cirtog, V. Michoud, M. Cazaunau, A. Bergé, C. Cantrell, S. Dusanter, B. Picquet-Varrault, A. Kukui, A. Mellouki, L. J. Carpenter, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 11603-11618 (2024)
The budget of reactive nitrogen species, which play a central role in atmospheric chemistry (e.g. in photochemical O3 production), is poorly understood in forested regions. In this study, through observations of NO, NO2, NOy, and O3 in the Rambouille
Externí odkaz:
https://doaj.org/article/b04053af0bd848c7954cc15d01196615
Autor:
P. Dewald, T. Seubert, S. T. Andersen, G. N. T. E. Türk, J. Schuladen, M. R. McGillen, C. Denjean, J.-C. Etienne, O. Garrouste, M. Jamar, S. Harb, M. Cirtog, V. Michoud, M. Cazaunau, A. Bergé, C. Cantrell, S. Dusanter, B. Picquet-Varrault, A. Kukui, C. Xue, A. Mellouki, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 8983-8997 (2024)
We present direct measurements of biogenic volatile organic compound (BVOC)-induced nitrate radical (NO3) reactivity (kVOC) through the diel cycle in the suburban, temperate forest of Rambouillet near Paris (France). The data were obtained in a 6-wee
Externí odkaz:
https://doaj.org/article/f4b2058d6683424482c46eb26b567804
Autor:
L. L. Röder, P. Dewald, C. M. Nussbaumer, J. Schuladen, J. N. Crowley, J. Lelieveld, H. Fischer
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 1167-1178 (2023)
In this study, we explore the applications and limitations of sequential Monte Carlo (SMC) filters to field experiments in atmospheric chemistry. The proposed algorithm is simple, fast, versatile and returns a complete probability distribution. It co
Externí odkaz:
https://doaj.org/article/3772f584eb8e4251bdfd70a8497e976d
Autor:
D. Dienhart, B. Brendel, J. N. Crowley, P. G. Eger, H. Harder, M. Martinez, A. Pozzer, R. Rohloff, J. Schuladen, S. Tauer, D. Walter, J. Lelieveld, H. Fischer
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 119-142 (2023)
Formaldehyde (HCHO), hydrogen peroxide (H2O2) and organic hydroperoxides (ROOH) play a key role in atmospheric oxidation processes. They act as sources and sinks for HOx radicals (OH + HO2), with OH as the primary oxidant that governs the atmospheric
Externí odkaz:
https://doaj.org/article/c34cdcd00794491ba953b8d6cbef07c5
Autor:
P. Dewald, C. M. Nussbaumer, J. Schuladen, A. Ringsdorf, A. Edtbauer, H. Fischer, J. Williams, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 7051-7069 (2022)
The reactivity of NO3 plays an important role in modifying the fate of reactive nitrogen species at nighttime. High reactivity (e.g. towards unsaturated volatile organic compounds – VOCs) can lead to formation of organic nitrates and secondary orga
Externí odkaz:
https://doaj.org/article/4ee5cbe3b4654897a8faab81ae8a86e3
Autor:
D. Dienhart, J. N. Crowley, E. Bourtsoukidis, A. Edtbauer, P. G. Eger, L. Ernle, H. Harder, B. Hottmann, M. Martinez, U. Parchatka, J.-D. Paris, E. Y. Pfannerstill, R. Rohloff, J. Schuladen, C. Stönner, I. Tadic, S. Tauer, N. Wang, J. Williams, J. Lelieveld, H. Fischer
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 17373-17388 (2021)
Formaldehyde (HCHO) is the most abundant aldehyde in the troposphere. While its background mixing ratio is mostly determined by the oxidation of methane, in many environments, especially in the boundary layer, HCHO can have a large variety of precurs
Externí odkaz:
https://doaj.org/article/6f0bd171a3334f9cb6d8cf85efa34ee8
Autor:
C. M. Nussbaumer, J. N. Crowley, J. Schuladen, J. Williams, S. Hafermann, A. Reiffs, R. Axinte, H. Harder, C. Ernest, A. Novelli, K. Sala, M. Martinez, C. Mallik, L. Tomsche, C. Plass-Dülmer, B. Bohn, J. Lelieveld, H. Fischer
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 18413-18432 (2021)
Various atmospheric sources and sinks regulate the abundance of tropospheric formaldehyde (HCHO), which is an important trace gas impacting the HOx (≡ HO2 + OH) budget and the concentration of ozone (O3). In this study, we present the formation and
Externí odkaz:
https://doaj.org/article/55e33d3cd3aa4d499d99cad07809961c
Autor:
P. G. Eger, L. Vereecken, R. Sander, J. Schuladen, N. Sobanski, H. Fischer, E. Karu, J. Williams, V. Vakkari, T. Petäjä, J. Lelieveld, A. Pozzer, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 14333-14349 (2021)
Based on the first measurements of gas-phase pyruvic acid (CH3C(O)C(O)OH) in the boreal forest, we derive effective emission rates of pyruvic acid and compare them with monoterpene emission rates over the diel cycle. Using a data-constrained box mode
Externí odkaz:
https://doaj.org/article/4b4582c6dbc248b3a77f2ac0a4c7fb89
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 5501-5519 (2021)
We present measurements of isoprene-derived organic nitrates (ISOP-NITs) generated in the reaction of isoprene with the nitrate radical (NO3) in a 1 m3 Teflon reaction chamber. Detection of ISOP-NITs is achieved via their thermal dissociation to nitr
Externí odkaz:
https://doaj.org/article/ed769a064619496e910d97e157d560c2
Autor:
N. Friedrich, P. Eger, J. Shenolikar, N. Sobanski, J. Schuladen, D. Dienhart, B. Hottmann, I. Tadic, H. Fischer, M. Martinez, R. Rohloff, S. Tauer, H. Harder, E. Y. Pfannerstill, N. Wang, J. Williams, J. Brooks, F. Drewnick, H. Su, G. Li, Y. Cheng, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 7473-7498 (2021)
We present shipborne measurements of NOx (≡ NO + NO2) and NOy (≡ NOx+ gas- and particle-phase organic and inorganic oxides of nitrogen) in summer 2017 as part of the expedition “Air Quality and climate change in the Arabian BAsin” (AQABA). Th
Externí odkaz:
https://doaj.org/article/0b4ba9bd0ef74732b4775342d2da05b7