TY  - JOUR
A1  - Kürten, Christoph Andreas
A1  - Bergen, Anton
A1  - Heinritzi, Martin
A1  - Leiminger, Markus
A1  - Lorenz, Verena
A1  - Piel, Felix
A1  - Simon, Mario
A1  - Sitals, Robert
A1  - Wagner, Andrea Christine
A1  - Curtius, Joachim
T1  - Observation of new particle formation and measurement of sulfuric acid, ammonia, amines and highly oxidized molecules using nitrate CI-APi-TOF at a rural site in central Germany
T2  - Atmospheric chemistry and physics. Discussions
N2  - The exact mechanisms for new particle formation (NPF) under different boundary layer conditions are not known yet. One important question is if amines and sulfuric acid lead to efficient NPF in the atmosphere. Furthermore, it is not clear to what extent highly oxidized organic molecules (HOM) are involved in NPF. We conducted field measurements at a rural site in central Germany in the proximity of three larger dairy farms to investigate if there is a connection between NPF and the presence of amines and/or ammonia due to the local emissions from the farms. Comprehensive measurements using a nitrate Chemical Ionization-Atmospheric Pressure interface-Time Of Flight (CI-APi-TOF) mass spectrometer, a Proton Transfer Reaction-Mass Spectrometer (PTR-MS), particle counters and Differential Mobility Analyzers (DMAs) as well as measurements of trace gases and meteorological parameters were performed. It is shown that the nitrate CI-APi-TOF is suitable for sensitive measurements of sulfuric acid, amines, a nitrosamine, ammonia, iodic acid and HOM. NPF was found to correlate with sulfuric acid, while an anti-correlation with RH, amines and ammonia is observed. The anti-correlation between NPF and amines could be due to the efficient uptake of these compounds by nucleating clusters and small particles. Much higher HOM dimer (C19/C20 compounds) concentrations during the night than during the day indicate that these HOM do not efficiently self-nucleate as no night-time NPF is observed. Observed iodic acid probably originates from an iodine-containing reservoir substance but the iodine signals are very likely too low to have a significant effect on NPF.
Y1  - 2016
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/42012
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-420123
UR  - http://www.atmos-chem-phys.net/16/12793/2016
SN  - 1680-7375
SN  - 1680-7367
N1  - © Author(s) 2016. CC-BY 3.0 License.
VL  - 16
SP  - 1
EP  - 47
PB  - European Geosciences Union
CY  - Katlenburg-Lindau
ER  -