Universität zu Köln

Tan, Zhaofeng, Fuchs, Hendrik ORCID: 0000-0003-1263-0061, Hofzumahaus, Andreas, Bloss, William J., Bohn, Birger ORCID: 0000-0003-4177-3934, Cho, Changmin, Hohaus, Thorsten, Holland, Frank, Lakshmisha, Chandrakiran, Liu, Lu ORCID: 0000-0002-9818-6282, Monks, Paul S., Novelli, Anna ORCID: 0000-0003-2077-7573, Niether, Doreen, Rohrer, Franz, Tillmann, Ralf ORCID: 0000-0003-0648-6622, Valkenburg, Thalassa S. E., Vardhan, Vaishali, Kiendler-Scharr, Astrid, Wahner, Andreas and Sommariva, Roberto ORCID: 0000-0002-2728-5814 (2022). Seasonal variation in nitryl chloride and its relation to gas-phase precursors during the JULIAC campaign in Germany. Atmos. Chem. Phys., 22 (19). S. 13137 - 13153. GOTTINGEN: COPERNICUS GESELLSCHAFT MBH. ISSN 1680-7324

Full text not available from this repository.

Abstract

Ambient measurements of nitryl chloride (ClNO2) were performed at a rural site in Germany, covering three periods in winter, summer, and autumn 2019, as part of the JULIAC campaign (Julich Atmospheric Chemistry Project) that aimed to understand the photochemical processes in air masses typical of midwestern Europe. Measurements were conducted at 50 m aboveground, which was mainly located in the nocturnal boundary layer and thus uncoupled from local surface emissions. ClNO2 is produced at night by the heterogeneous reaction of dinitrogen pentoxide (N2O5) on chloride (Cl-) that contains aerosol. Its photolysis during the day is of general interest, as it produces chlorine (Cl) atoms that react with different atmospheric trace gases to form radicals. The highest-observed ClNO2 mixing ratio was 1.6 ppbv (parts per billion by volume; 15 min average) during the night of 20 September. Air masses reaching the measurement site either originated from long-range transport from the southwest and had an oceanic influence or circulated in the nearby region and were influenced by anthropogenic activities. Nocturnal maximum ClNO(2 )mixing ratios were around 0.2 ppbv if originating from long-range transport in nearly all seasons, while the values were higher, ranging from 0.4 to 0.6 ppbv for regionally influenced air. The chemical composition of long-range transported air was similar in all investigated seasons, while the regional air exhibited larger differences between the seasons. The N2O5 necessary for ClNO2 formation comes from the reaction of nitrate radicals (NO3) with nitrogen dioxide (NO2), where NO3 itself is formed by a reaction of NO2 with ozone (O-3). Measured concentrations of ClNO2, NO2, and O(3 )were used to quantify ClNO(2 )production efficiencies, i.e., the yield of ClNO2 formation per NO3 radical formed, and a box model was used to examine the idealized dependence of ClNO2 on the observed nocturnal O(3 )and NO2 concentrations. Results indicate that ClNO(2 )production efficiency was most sensitive to the availability of NO2 rather than that of O(3 )and increased with decreasing temperature. The average ClNO2 production efficiency was highest in February and September, with values of 18 %, and was lowest in December, with values of 3 %. The average ClNO2 production efficiencies were in the range of 3 % and 6 % from August to November for air masses originating from long-range transportation. These numbers are at the high end of values reported in the literature, indicating the importance of ClNO2 chemistry in rural environments in midwestern Europe.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Tan, Zhaofeng UNSPECIFIED UNSPECIFIED UNSPECIFIED Fuchs, Hendrik UNSPECIFIED orcid.org/0000-0003-1263-0061 UNSPECIFIED Hofzumahaus, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Bloss, William J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bohn, Birger UNSPECIFIED orcid.org/0000-0003-4177-3934 UNSPECIFIED Cho, Changmin UNSPECIFIED UNSPECIFIED UNSPECIFIED Hohaus, Thorsten UNSPECIFIED UNSPECIFIED UNSPECIFIED Holland, Frank UNSPECIFIED UNSPECIFIED UNSPECIFIED Lakshmisha, Chandrakiran UNSPECIFIED UNSPECIFIED UNSPECIFIED Liu, Lu UNSPECIFIED orcid.org/0000-0002-9818-6282 UNSPECIFIED Monks, Paul S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Novelli, Anna UNSPECIFIED orcid.org/0000-0003-2077-7573 UNSPECIFIED Niether, Doreen UNSPECIFIED UNSPECIFIED UNSPECIFIED Rohrer, Franz UNSPECIFIED UNSPECIFIED UNSPECIFIED Tillmann, Ralf UNSPECIFIED orcid.org/0000-0003-0648-6622 UNSPECIFIED Valkenburg, Thalassa S. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vardhan, Vaishali UNSPECIFIED UNSPECIFIED UNSPECIFIED Kiendler-Scharr, Astrid UNSPECIFIED UNSPECIFIED UNSPECIFIED Wahner, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Sommariva, Roberto UNSPECIFIED orcid.org/0000-0002-2728-5814 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-684217
DOI:	10.5194/acp-22-13137-2022
Journal or Publication Title:	Atmos. Chem. Phys.
Volume:	22
Number:	19
Page Range:	S. 13137 - 13153
Date:	2022
Publisher:	COPERNICUS GESELLSCHAFT MBH
Place of Publication:	GOTTINGEN
ISSN:	1680-7324
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HETEROGENEOUS N2O5 UPTAKE; BOUNDARY-LAYER; POLLUTED REGION; RESIDUAL LAYER; POWER-PLANT; CLNO2; URBAN; SITE; OXIDATION; NO3 Multiple languages Environmental Sciences; Meteorology & Atmospheric Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68421