Zobrazeno 1 - 10
of 36
pro vyhledávání: '"N. Sobanski"'
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
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
Autor:
P. G. Eger, J. Schuladen, N. Sobanski, H. Fischer, E. Karu, J. Williams, M. Riva, Q. Zha, M. Ehn, L. L. J. Quéléver, S. Schallhart, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 3697-3711 (2020)
Pyruvic acid (CH3C(O)C(O)OH, 2-oxopropanoic acid) is an organic acid of biogenic origin that plays a crucial role in plant metabolism, is present in tropospheric air in both gas-phase and aerosol-phase, and is implicated in the formation of secondary
Externí odkaz:
https://doaj.org/article/bf3c3ceb39e446a2b69cd4738fae5d33
Autor:
J. Liebmann, N. Sobanski, J. Schuladen, E. Karu, H. Hellén, H. Hakola, Q. Zha, M. Ehn, M. Riva, L. Heikkinen, J. Williams, H. Fische, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 10391-10403 (2019)
The formation of alkyl nitrates in various oxidation processes taking place throughout the diel cycle can represent an important sink of reactive nitrogen and mechanism for chain termination in atmospheric photo-oxidation cycles. The low-volatility a
Externí odkaz:
https://doaj.org/article/3726fcc1606045c1bfa2be5ec748e7a4
Autor:
J. Liebmann, E. Karu, N. Sobanski, J. Schuladen, M. Ehn, S. Schallhart, L. Quéléver, H. Hellen, H. Hakola, T. Hoffmann, J. Williams, H. Fischer, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 3799-3815 (2018)
We present the first direct measurements of NO3 reactivity (or inverse lifetime, s−1) in the Finnish boreal forest. The data were obtained during the IBAIRN campaign (Influence of Biosphere-Atmosphere Interactions on the Reactive Nitrogen budget
Externí odkaz:
https://doaj.org/article/a48480eef07249d7ae10ac0f6b955b89
Autor:
N. Sobanski, J. Thieser, J. Schuladen, C. Sauvage, W. Song, J. Williams, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Iss 6, Pp 4115-4130 (2017)
We report in situ measurements of total peroxy nitrates (ΣPNs) and total alkyl nitrates (ΣANs) in a forested–urban location at the top of the Kleiner Feldberg mountain in south-west Germany. The data, obtained using thermal dissociation cavity ri
Externí odkaz:
https://doaj.org/article/9557dd8f36594ca98808287c2fd4da97
Publikováno v:
Atmospheric Measurement Techniques, Vol 10, Iss 3, Pp 1241-1258 (2017)
We describe the first instrument for measurement of the rate constant (s−1) for reactive loss (i.e., the total reactivity) of NO3 in ambient air. Cavity-ring-down spectroscopy is used to monitor the mixing ratio of synthetically generated NO3 ( ≈
Externí odkaz:
https://doaj.org/article/bdeca72b77ff422489d40ff312516167
Publikováno v:
Atmospheric Measurement Techniques, Vol 9, Iss 10, Pp 5103-5118 (2016)
We report the characteristics and performance of a newly developed five-channel cavity ring-down spectrometer to detect NO3, N2O5, NO2, total peroxy nitrates (ΣPNs) and total alkyl nitrates (ΣANs). NO3 and NO2 are detected directly at 662 and 405 n
Externí odkaz:
https://doaj.org/article/2a30b2625b134fef8a73af9c90c49201
Autor:
G. J. Phillips, J. Thieser, M. Tang, N. Sobanski, G. Schuster, J. Fachinger, F. Drewnick, S. Borrmann, H. Bingemer, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 13231-13249 (2016)
We present an estimation of the uptake coefficient (γ) and yield of nitryl chloride (ClNO2) (f) for the heterogeneous processing of dinitrogen pentoxide (N2O5) using simultaneous measurements of particle and trace gas composition at a semi-rural,
Externí odkaz:
https://doaj.org/article/9a07917c161b4a729abe910599a41f02
Autor:
N. Sobanski, M. J. Tang, J. Thieser, G. Schuster, D. Pöhler, H. Fischer, W. Song, C. Sauvage, J. Williams, J. Fachinger, F. Berkes, P. Hoor, U. Platt, J. Lelieveld, J. N. Crowley
Publikováno v:
Atmospheric Chemistry and Physics, Vol 16, Pp 4867-4883 (2016)
Through measurements of NO2, O3 and NO3 during the PARADE campaign (PArticles and RAdicals, Diel observations of mEchanisms of oxidation) in the German Taunus mountains we derive nighttime steady-state lifetimes (τss) of NO3 and N2O5. During som
Externí odkaz:
https://doaj.org/article/cd3cb37c54514770899a0f03efba3c2c