Zobrazeno 1 - 10
of 88
pro vyhledávání: '"D. Niedermeier"'
Autor:
J. L. Nowak, R. Grosz, W. Frey, D. Niedermeier, J. Mijas, S. P. Malinowski, L. Ort, S. Schmalfuß, F. Stratmann, J. Voigtländer, T. Stacewicz
Publikováno v:
Atmospheric Measurement Techniques, Vol 15, Pp 4075-4089 (2022)
The Fast Infrared Hygrometer (FIRH), employing open-path tunable diode laser absorption spectroscopy at the wavelengths near the 1364.6896 nm line, was adapted to perform contactless humidity measurements at the Turbulent Leipzig Aerosol Cloud Intera
Externí odkaz:
https://doaj.org/article/3871fc8bd42442f9bcf1eb7c48c25b25
Autor:
D. Niedermeier, J. Voigtländer, S. Schmalfuß, D. Busch, J. Schumacher, R. A. Shaw, F. Stratmann
Publikováno v:
Atmospheric Measurement Techniques, Vol 13, Pp 2015-2033 (2020)
The interactions between turbulence and cloud microphysical processes have been investigated primarily through numerical simulation and field measurements over the last 10 years. However, only in the laboratory we can be confident in our knowledge of
Externí odkaz:
https://doaj.org/article/e2a98f71f02c452886146990591cc9f4
Autor:
J. Voigtländer, C. Chou, H. Bieligk, T. Clauss, S. Hartmann, P. Herenz, D. Niedermeier, G. Ritter, F. Stratmann, Z. Ulanowski
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 13687-13702 (2018)
Ice surface properties can modify the scattering properties of atmospheric ice crystals and therefore affect the radiative properties of mixed-phase and cirrus clouds. The Ice Roughness Investigation System (IRIS) is a new laboratory setup designe
Externí odkaz:
https://doaj.org/article/ae9e1640fc8345779490dd3bf550da20
Autor:
B. G. Pummer, C. Budke, S. Augustin-Bauditz, D. Niedermeier, L. Felgitsch, C. J. Kampf, R. G. Huber, K. R. Liedl, T. Loerting, T. Moschen, M. Schauperl, M. Tollinger, C. E. Morris, H. Wex, H. Grothe, U. Pöschl, T. Koop, J. Fröhlich-Nowoisky
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 8, Pp 4077-4091 (2015)
Cloud glaciation is critically important for the global radiation budget (albedo) and for initiation of precipitation. But the freezing of pure water droplets requires cooling to temperatures as low as 235 K. Freezing at higher temperatures requires
Externí odkaz:
https://doaj.org/article/8a30cc17c45d47619d9722ed146bfcda
Autor:
N. Hiranuma, S. Augustin-Bauditz, H. Bingemer, C. Budke, J. Curtius, A. Danielczok, K. Diehl, K. Dreischmeier, M. Ebert, F. Frank, N. Hoffmann, K. Kandler, A. Kiselev, T. Koop, T. Leisner, O. Möhler, B. Nillius, A. Peckhaus, D. Rose, S. Weinbruch, H. Wex, Y. Boose, P. J. DeMott, J. D. Hader, T. C. J. Hill, Z. A. Kanji, G. Kulkarni, E. J. T. Levin, C. S. McCluskey, M. Murakami, B. J. Murray, D. Niedermeier, M. D. Petters, D. O'Sullivan, A. Saito, G. P. Schill, T. Tajiri, M. A. Tolbert, A. Welti, T. F. Whale, T. P. Wright, K. Yamashita
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 5, Pp 2489-2518 (2015)
Immersion freezing is the most relevant heterogeneous ice nucleation mechanism through which ice crystals are formed in mixed-phase clouds. In recent years, an increasing number of laboratory experiments utilizing a variety of instruments have examin
Externí odkaz:
https://doaj.org/article/658942d714a649919f6f1d4811b466df
Autor:
H. Wex, S. Augustin-Bauditz, Y. Boose, C. Budke, J. Curtius, K. Diehl, A. Dreyer, F. Frank, S. Hartmann, N. Hiranuma, E. Jantsch, Z. A. Kanji, A. Kiselev, T. Koop, O. Möhler, D. Niedermeier, B. Nillius, M. Rösch, D. Rose, C. Schmidt, I. Steinke, F. Stratmann
Publikováno v:
Atmospheric Chemistry and Physics, Vol 15, Iss 3, Pp 1463-1485 (2015)
Seven different instruments and measurement methods were used to examine the immersion freezing of bacterial ice nuclei from Snomax® (hereafter Snomax), a product containing ice-active protein complexes from non-viable Pseudomonas syringae bacteria.
Externí odkaz:
https://doaj.org/article/28f304d3ab16480fbb598e57d98f5737
Autor:
H. Wex, P. J. DeMott, Y. Tobo, S. Hartmann, M. Rösch, T. Clauss, L. Tomsche, D. Niedermeier, F. Stratmann
Publikováno v:
Atmospheric Chemistry and Physics, Vol 14, Iss 11, Pp 5529-5546 (2014)
Kaolinite particles from two different sources (Fluka and Clay Minerals Society (CMS)) were examined with respect to their ability to act as ice nuclei (IN). This was done in the water-subsaturated regime where often deposition ice nucleation is a
Externí odkaz:
https://doaj.org/article/b3f6a1b205354586bea5d41ed72d5a80
Autor:
S. Augustin, H. Wex, D. Niedermeier, B. Pummer, H. Grothe, S. Hartmann, L. Tomsche, T. Clauss, J. Voigtländer, K. Ignatius, F. Stratmann
Publikováno v:
Atmospheric Chemistry and Physics, Vol 13, Iss 21, Pp 10989-11003 (2013)
Birch pollen grains are known to be ice nucleating active biological particles. The ice nucleating activity has previously been tracked down to biological macromolecules that can be easily extracted from the pollen grains in water. In the present stu
Externí odkaz:
https://doaj.org/article/1f2a50f3246147b696f2f2e3e5c4f593
Autor:
S. Hartmann, S. Augustin, T. Clauss, H. Wex, T. Šantl-Temkiv, J. Voigtländer, D. Niedermeier, F. Stratmann
Publikováno v:
Atmospheric Chemistry and Physics, Vol 13, Iss 11, Pp 5751-5766 (2013)
Utilising the Leipzig Aerosol Cloud Interaction Simulator (LACIS), the immersion freezing behaviour of droplet ensembles containing monodisperse particles, generated from a Snomax™ solution/suspension, was investigated. Thereto ice fractions were m
Externí odkaz:
https://doaj.org/article/24c7825b18d04f7b81f98709542171dc
Autor:
T. Clauss, A. Kiselev, S. Hartmann, S. Augustin, S. Pfeifer, D. Niedermeier, H. Wex, F. Stratmann
Publikováno v:
Atmospheric Measurement Techniques, Vol 6, Iss 4, Pp 1041-1052 (2013)
We report on the development and test results of the new optical particle counter TOPS-Ice (Thermo-stabilized Optical Particle Spectrometer for the detection of Ice). The instrument uses measurements of the cross-polarized scattered light by single p
Externí odkaz:
https://doaj.org/article/c0635e264ecc42178998f03ce030e693