气候变化领域集成服务门户(CCPortal): Seasonal variation in nitryl chloride and its relation to gas-phase precursors during the JULIAC campaign in Germany

CCPortal

DOI	10.5194/acp-22-13137-2022
	Seasonal variation in nitryl chloride and its relation to gas-phase precursors during the JULIAC campaign in Germany
	Tan, Zhaofeng; Fuchs, Hendrik; Hofzumahaus, Andreas; Bloss, William J.; Bohn, Birger; Cho, Changmin; Hohaus, Thorsten; Holland, Frank; Lakshmisha, Chandrakiran; Liu, Lu; Monks, Paul S.; Novelli, Anna; Niether, Doreen; Rohrer, Franz; Tillmann, Ralf; Valkenburg, Thalassa S. E.; Vardhan, Vaishali; Kiendler-Scharr, Astrid; Wahner, Andreas; Sommariva, Roberto
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	13137
结束页码	13152
卷号	22 期号:19 页码:16
英文摘要	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.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000866155100001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273881
作者单位	Helmholtz Association; Research Center Julich; University of Cologne; University of Birmingham; University of Leicester; University College Cork
推荐引用方式 GB/T 7714	Tan, Zhaofeng,Fuchs, Hendrik,Hofzumahaus, Andreas,et al. Seasonal variation in nitryl chloride and its relation to gas-phase precursors during the JULIAC campaign in Germany[J],2022,22(19):16.
APA	Tan, Zhaofeng.,Fuchs, Hendrik.,Hofzumahaus, Andreas.,Bloss, William J..,Bohn, Birger.,...&Sommariva, Roberto.(2022).Seasonal variation in nitryl chloride and its relation to gas-phase precursors during the JULIAC campaign in Germany.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(19),16.
MLA	Tan, Zhaofeng,et al."Seasonal variation in nitryl chloride and its relation to gas-phase precursors during the JULIAC campaign in Germany".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.19(2022):16.