Zobrazeno 1 - 10
of 56
pro vyhledávání: '"T. Keber"'
Autor:
T. J. Schuck, J. Degen, E. Hintsa, P. Hoor, M. Jesswein, T. Keber, D. Kunkel, F. Moore, F. Obersteiner, M. Rigby, T. Wagenhäuser, L. M. Western, A. Zahn, A. Engel
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 689-705 (2024)
Anthropogenic trace gases often exhibit interhemispheric gradients because of larger emissions in the Northern Hemisphere. Depending on a tracer's emission pattern and sink processes, trace gas observations can thus be used to investigate interhemisp
Externí odkaz:
https://doaj.org/article/75a7946e31f44e37a4b7c625722a7c6f
Publikováno v:
Atmospheric Chemistry and Physics, Vol 23, Pp 3887-3903 (2023)
The age of stratospheric air is a concept commonly used to evaluate transport timescales in atmospheric models. The mean age can be derived from observations of a single long-lived trace gas species with a known tropospheric trend. Commonly, deriving
Externí odkaz:
https://doaj.org/article/0fa929f8079643058ff0d6f74be01dbd
Autor:
M. Jesswein, R. P. Fernandez, L. Berná, A. Saiz-Lopez, J.-U. Grooß, R. Hossaini, E. C. Apel, R. S. Hornbrook, E. L. Atlas, D. R. Blake, S. Montzka, T. Keber, T. Schuck, T. Wagenhäuser, A. Engel
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 15049-15070 (2022)
Bromine released from the decomposition of short-lived brominated source gases contributes as a sink of ozone in the lower stratosphere. The two major contributors are CH2Br2 and CHBr3. In this study, we investigate the global seasonal distribution o
Externí odkaz:
https://doaj.org/article/dc488a044f654d29b5b8057141b708fa
Autor:
M. Zauner-Wieczorek, M. Heinritzi, M. Granzin, T. Keber, A. Kürten, K. Kaiser, J. Schneider, J. Curtius
Publikováno v:
Atmospheric Chemistry and Physics, Vol 22, Pp 11781-11794 (2022)
Ambient ions play an important role in atmospheric processes such as ion-induced new particle formation. While there are several studies of ambient ions for different layers of the atmosphere, data coverage for the free troposphere and especially the
Externí odkaz:
https://doaj.org/article/05c4fea5345746d1906b1a1b068f1113
Autor:
P. D. Hamer, V. Marécal, R. Hossaini, M. Pirre, G. Krysztofiak, F. Ziska, A. Engel, S. Sala, T. Keber, H. Bönisch, E. Atlas, K. Krüger, M. Chipperfield, V. Catoire, A. A. Samah, M. Dorf, P. Siew Moi, H. Schlager, K. Pfeilsticker
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 16955-16984 (2021)
This paper presents a modelling study on the fate of CHBr3 and its product gases in the troposphere within the context of tropical deep convection. A cloud-scale case study was conducted along the west coast of Borneo, where several deep convective s
Externí odkaz:
https://doaj.org/article/9a7cab26655a4e25a000fdd477159eae
Autor:
M. Jesswein, H. Bozem, H.-C. Lachnitt, P. Hoor, T. Wagenhäuser, T. Keber, T. Schuck, A. Engel
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 17225-17241 (2021)
Stratospheric inorganic chlorine (Cly) is predominantly released from long-lived chlorinated source gases and, to a small extent, very short-lived chlorinated substances. Cly includes the reservoir species (HCl and ClONO2) and active chlorine species
Externí odkaz:
https://doaj.org/article/a11b4302f5b24cd5badf62662409f446
Autor:
M. K. Rotermund, V. Bense, M. P. Chipperfield, A. Engel, J.-U. Grooß, P. Hoor, T. Hüneke, T. Keber, F. Kluge, B. Schreiner, T. Schuck, B. Vogel, A. Zahn, K. Pfeilsticker
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 15375-15407 (2021)
We report on measurements of total bromine (Brtot) in the upper troposphere and lower stratosphere taken during 15 flights with the German High Altitude and LOng range research aircraft (HALO). The research campaign WISE (Wave-driven ISentropic Excha
Externí odkaz:
https://doaj.org/article/03ccca17c5ea4c1caedb56421e2b5bce
Autor:
M. Heinritzi, L. Dada, M. Simon, D. Stolzenburg, A. C. Wagner, L. Fischer, L. R. Ahonen, S. Amanatidis, R. Baalbaki, A. Baccarini, P. S. Bauer, B. Baumgartner, F. Bianchi, S. Brilke, D. Chen, R. Chiu, A. Dias, J. Dommen, J. Duplissy, H. Finkenzeller, C. Frege, C. Fuchs, O. Garmash, H. Gordon, M. Granzin, I. El Haddad, X. He, J. Helm, V. Hofbauer, C. R. Hoyle, J. Kangasluoma, T. Keber, C. Kim, A. Kürten, H. Lamkaddam, T. M. Laurila, J. Lampilahti, C. P. Lee, K. Lehtipalo, M. Leiminger, H. Mai, V. Makhmutov, H. E. Manninen, R. Marten, S. Mathot, R. L. Mauldin, B. Mentler, U. Molteni, T. Müller, W. Nie, T. Nieminen, A. Onnela, E. Partoll, M. Passananti, T. Petäjä, J. Pfeifer, V. Pospisilova, L. L. J. Quéléver, M. P. Rissanen, C. Rose, S. Schobesberger, W. Scholz, K. Scholze, M. Sipilä, G. Steiner, Y. Stozhkov, C. Tauber, Y. J. Tham, M. Vazquez-Pufleau, A. Virtanen, A. L. Vogel, R. Volkamer, R. Wagner, M. Wang, L. Weitz, D. Wimmer, M. Xiao, C. Yan, P. Ye, Q. Zha, X. Zhou, A. Amorim, U. Baltensperger, A. Hansel, M. Kulmala, A. Tomé, P. M. Winkler, D. R. Worsnop, N. M. Donahue, J. Kirkby, J. Curtius
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 11809-11821 (2020)
Nucleation of atmospheric vapours produces more than half of global cloud condensation nuclei and so has an important influence on climate. Recent studies show that monoterpene (C10H16) oxidation yields highly oxygenated products that can nucleate wi
Externí odkaz:
https://doaj.org/article/1582eecc07b7453a9e079d9b0aaaa34a
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 8763-8785 (2020)
Derivation of mean age of air (AoA) and age spectra from atmospheric measurements remains a challenge and often requires output from atmospheric models. This study tries to minimize the direct influence of model output and presents an extension and a
Externí odkaz:
https://doaj.org/article/481b3e89bd044165a4f9fe7f86c1a84a
Autor:
T. Keber, H. Bönisch, C. Hartick, M. Hauck, F. Lefrancois, F. Obersteiner, A. Ringsdorf, N. Schohl, T. Schuck, R. Hossaini, P. Graf, P. Jöckel, A. Engel
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 4105-4132 (2020)
We present novel measurements of five short-lived brominated source gases (CH2Br2, CHBr3, CH2ClBr, CHCl2Br and CHClBr2). These rather short-lived gases are an important source of bromine to the stratosphere, where they can lead to depletion of ozone.
Externí odkaz:
https://doaj.org/article/474816778f114c989db32679592a4ae9