Zobrazeno 1 - 10
of 76
pro vyhledávání: '"U. Parchatka"'
Autor:
L. Ort, L. L. Röder, U. Parchatka, R. Königstedt, D. Crowley, F. Kunz, R. Wittkowski, J. Lelieveld, H. Fischer
Publikováno v:
Atmospheric Measurement Techniques, Vol 17, Pp 3553-3565 (2024)
Here, we report on the development of a new quantum cascade laser infrared absorption spectroscopy (QLAS) instrument, the Airborne Tropospheric Tracer In-situ Laser Absorption spectrometer (ATTILA), for atmospheric trace-gas measurements on board of
Externí odkaz:
https://doaj.org/article/501b1d8dbfdc46bc8bfeb88ac491a5c2
Autor:
Z. Hamryszczak, A. Hartmann, D. Dienhart, S. Hafermann, B. Brendel, R. Königstedt, U. Parchatka, J. Lelieveld, H. Fischer
Publikováno v:
Atmospheric Measurement Techniques, Vol 16, Pp 4741-4756 (2023)
Measurements of hydroperoxides help improve our understanding of atmospheric oxidation processes. Here, we introduce an instrument setup designed for airborne hydroperoxide measurements. The HYdrogen Peroxide and Higher Organic Peroxides (HYPHOP) mon
Externí odkaz:
https://doaj.org/article/d1f0776cb880425ba76f0cf1c89c471a
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, U. Parchatka, I. Tadic, B. Bohn, D. Marno, M. Martinez, R. Rohloff, H. Harder, F. Kluge, K. Pfeilsticker, F. Obersteiner, M. Zöger, R. Doerich, J. N. Crowley, J. Lelieveld, H. Fischer
Publikováno v:
Atmospheric Measurement Techniques, Vol 14, Pp 6759-6776 (2021)
Nitrogen oxides (NOx≡NO+NO2) are centrally involved in the photochemical processes taking place in the Earth's atmosphere. Measurements of NO2, particularly in remote areas where concentrations are of the order of parts per trillion by volume (pptv
Externí odkaz:
https://doaj.org/article/edb75cd29323400aa1f7f4b736151a80
Autor:
I. Tadic, C. M. Nussbaumer, B. Bohn, H. Harder, D. Marno, M. Martinez, F. Obersteiner, U. Parchatka, A. Pozzer, R. Rohloff, M. Zöger, J. Lelieveld, H. Fischer
Publikováno v:
Atmospheric Chemistry and Physics, Vol 21, Pp 8195-8211 (2021)
Mechanisms of tropospheric ozone (O3) formation are generally well understood. However, studies reporting on net ozone production rates (NOPRs) directly derived from in situ observations are challenging and are sparse in number. To analyze the role o
Externí odkaz:
https://doaj.org/article/30b7069a59444078a56fa78beeecf499
Autor:
I. Tadic, J. N. Crowley, D. Dienhart, P. Eger, H. Harder, B. Hottmann, M. Martinez, U. Parchatka, J.-D. Paris, A. Pozzer, R. Rohloff, J. Schuladen, J. Shenolikar, S. Tauer, J. Lelieveld, H. Fischer
Publikováno v:
Atmospheric Chemistry and Physics, Vol 20, Pp 6769-6787 (2020)
Strongly enhanced tropospheric ozone (O3) mixing ratios have been reported in the Arabian Basin, a region with intense solar radiation and high concentrations of O3 precursors such as nitrogen oxides (NOx) and volatile organic compounds (VOCs). To an
Externí odkaz:
https://doaj.org/article/21e0220495fd46bcbb973517efde0ba4
Autor:
H. Fischer, R. Axinte, H. Bozem, J. N. Crowley, C. Ernest, S. Gilge, S. Hafermann, H. Harder, K. Hens, R. H. H. Janssen, R. Königstedt, D. Kubistin, C. Mallik, M. Martinez, A. Novelli, U. Parchatka, C. Plass-Dülmer, A. Pozzer, E. Regelin, A. Reiffs, T. Schmidt, J. Schuladen, J. Lelieveld
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 11953-11968 (2019)
Hydrogen peroxide (H2O2) plays a significant role in the oxidizing capacity of the atmosphere. It is an efficient oxidant in the liquid phase and serves as a temporary reservoir for the hydroxyl radical (OH), the most important oxidizing agent in the
Externí odkaz:
https://doaj.org/article/dd8b4612dcdd468588173960a02e0fcc
Autor:
U. Javed, D. Kubistin, M. Martinez, J. Pollmann, M. Rudolf, U. Parchatka, A. Reiffs, J. Thieser, G. Schuster, M. Horbanski, D. Pöhler, J. N. Crowley, H. Fischer, J. Lelieveld, H. Harder
Publikováno v:
Atmospheric Measurement Techniques, Vol 12, Pp 1461-1481 (2019)
GANDALF (Gas Analyzer for Nitrogen Dioxide Applying Laser-induced Fluorescence), a new instrument for the detection of nitrogen dioxide based on the laser-induced fluorescence (LIF) technique, is presented in this paper. GANDALF is designed for groun
Externí odkaz:
https://doaj.org/article/63c05196860a4519881d36c889672ecd
Publikováno v:
Atmospheric Chemistry and Physics, Vol 19, Pp 1915-1939 (2019)
The Asian monsoon anticyclone (AMA) is annual phenomenon in the northern hemispheric upper troposphere and lower stratosphere. It is part of the South Asian summer monsoon system, and it has a clearly observable signature due to the vertical transpor
Externí odkaz:
https://doaj.org/article/80482e45446c43298bcd4d6b49b5564f
Autor:
B. Derstroff, I. Hüser, E. Bourtsoukidis, J. N. Crowley, H. Fischer, S. Gromov, H. Harder, R. H. H. Janssen, J. Kesselmeier, J. Lelieveld, C. Mallik, M. Martinez, A. Novelli, U. Parchatka, G. J. Phillips, R. Sander, C. Sauvage, J. Schuladen, C. Stönner, L. Tomsche, J. Williams
Publikováno v:
Atmospheric Chemistry and Physics, Vol 17, Pp 9547-9566 (2017)
During the summertime CYPHEX campaign (CYprus PHotochemical EXperiment 2014) in the eastern Mediterranean, multiple volatile organic compounds (VOCs) were measured from a 650 m hilltop site in western Cyprus (34° 57′ N/32° 23′ E). Periodic s
Externí odkaz:
https://doaj.org/article/8da821c4dcf5438994368f4c4a090541