Occurrence of atmospheric nitrous acid in the urban area of Beijing (China)

Spataro, Francesca; Ianniello, A.; Esposito, Giulio; Allegrini, I.; Zhu, Tong; Hu, Min

doi:10.1016/j.scitotenv.2012.12.065

Cited by 96 publications

(104 citation statements)

References 108 publications

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“…The extended model with the additional HONO sources succeeded to capture the magnitude and the diurnal variations of the observed data (Table S1), e.g., promising improvement in the model performance is found for predictions of O 3 peaks in urban areas (Li et al 2011). Our results agree with other studies (Li et al 2010;Elshorbany et al 2012;Gonçalves et al 2012), showing that at least the Het and the Emis should be included in models, since their impact on second- (2010) and Spataro et al (2013). Case R is a reference case; Case E includes NO 2 * chemistry, the NO 2 heterogeneous reaction on aerosol surfaces and HONO emissions.…”

Section: Model Evaluation a Concentrations Of No Y Speciessupporting

confidence: 84%

“…For winter period, only 24-h averages of HONO, NO 2 and NO 3 − were obtained. Details were given in Liu et al (2010) and Spataro et al (2013).…”

Section: Observed Datamentioning

confidence: 99%

“…In summer, interferences on the order of 2−9% from nitrite-forming species were observed and corrected using sodium carbonate denuders (Spataro et al 2013). The detection limit was 0.88 ppt (Spataro et al 2013;Spataro and Ianniello 2014). The uncertainty for HONO measurements was ~10% (Liu et al 2010).…”

Section: Observed Datamentioning

confidence: 99%

“…The uncertainty for HONO measurements was ~10% (Liu et al 2010). The 24-h averages of HONO (HONO/NO 2 ) were 0.44−2.91 ppb (0.01−0.09), with the mean of 1.45 ppb (0.05) (Spataro et al 2013). Meantime hourly HONO were measured by the Differential Optical Absorption Spectroscopy (DOAS) at the Meteorological Tower in the Institute of Atmospheric Physics (39.97°N, 116.37°E), ~ 6 km away from Peking University, from 13 to 25 August 2007 (Zhu et al 2009).…”

Section: Observed Datamentioning

confidence: 99%

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Impacts of Additional HONO Sources on Concentrations and Deposition of NO<sub>y</sub> in the Beijing-Tianjin-Hebei Region of China

Liu

Kajino³

et al. 2015

SOLA

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This study applies the chemistry version of the Weather Research and Forecasting model (WRF-Chem) to examine impacts of three additional HONO sources, i.e., the reaction of photoexcited NO 2 (NO 2 * ) with water vapor (NO 2 * chemistry), the NO 2 heterogeneous reaction on aerosol surfaces and HONO emissions, on concentrations and deposition of individual NO y species over the Beijing-Tianjin-Hebei region (BTH) in summer and winter periods of 2007. The results show that the three additional HONO sources produce a 20%~40% (> 100%) increase in monthly-mean OH concentrations in many urban areas in August (February), leading to a 10%~40% (10%~100%) variation in monthly-mean concentrations of NO x , NO 3 − and PAN, a 5%~10% (10%~40%) increase in the total dry deposition of NO y , and an enhancement of 1.4 Gg N (1.5 Gg N) in the total of dry and wet deposition of NO y over this region in August (February). These results suggest that the additional HONO sources aggravate regional-scale acid deposition, emphasizing the importance of the additional HONO sources in the NO y budget.(Citation: Li, Y., J. An, M. Kajino, J. Li, and Y. Qu, 2015: Impacts of additional HONO sources on concentrations and deposition of NO y in the Beijing-Tianjin-Hebei region of China. SOLA, 11, 36−42,

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Section: Model Evaluation a Concentrations Of No Y Speciessupporting

confidence: 84%

“…For winter period, only 24-h averages of HONO, NO 2 and NO 3 − were obtained. Details were given in Liu et al (2010) and Spataro et al (2013).…”

Section: Observed Datamentioning

confidence: 99%

Section: Observed Datamentioning

confidence: 99%

Section: Observed Datamentioning

confidence: 99%

See 2 more Smart Citations

Impacts of Additional HONO Sources on Concentrations and Deposition of NO<sub>y</sub> in the Beijing-Tianjin-Hebei Region of China

Liu

Kajino³

et al. 2015

SOLA

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“…After sunrise, HONO mixing ratios are usually in low concentrations due to the strong photolysis of HONO. However, many field experiments have found daytime HONO mixing ratios that are unexpectedly higher than the theoretical steady value (∼ 10 ppt), in both urban and rural areas: e.g., 0.15-1.50 ppb in Asia (Su et al, 2008;Spataro et al, 2013), 0.01-0.43 ppb in Europe Acker and Möller, 2007;Sörgel et al, 2011;Michoud et al, 2014), 0.02-0.81 ppb in North America (Zhou et al, 2002a, b;Ren et al, 2010;Villena et al, 2011;Wong et al, 2012;VandenBoer et al, 2013), 2.00 ppb (maximum) in South America (Elshorbany et al, 2009), and 0.015-0.02 ppb in Antarctica (Kerbrat et al, 2012) (Fig. 1).…”

Section: Introductionmentioning

confidence: 92%

Impacts of an unknown daytime HONO source on the mixing ratio and budget of HONO, and hydroxyl, hydroperoxyl, and organic peroxy radicals, in the coastal regions of China

Tang

Wang

et al. 2015

Atmos. Chem. Phys.

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Abstract. Many field experiments have found high nitrous acid (HONO) mixing ratios in both urban and rural areas during daytime, but these high daytime HONO mixing ratios cannot be explained well by gas-phase production, HONO emissions, and nighttime hydrolysis conversion of nitrogen dioxide (NO 2 ) on aerosols, suggesting that an unknown daytime HONO source (P unknown ) could exist. The formula P unknown ≈ 19.60[NO 2 ] · J (NO 2 ) was obtained using observed data from 13 field experiments across the globe. The three additional HONO sources (i.e., the P unknown , nighttime hydrolysis conversion of NO 2 on aerosols, and HONO emissions) were coupled into the WRF-Chem model (Weather Research and Forecasting model coupled with Chemistry) to assess the P unknown impacts on the concentrations and budgets of HONO and peroxy (hydroxyl, hydroperoxyl, and organic peroxy) radicals (RO x ) (= OH + HO 2 + RO 2 ) in the coastal regions of China. Results indicated that the additional HONO sources produced a significant improvement in HONO and OH simulations, particularly in the daytime. High daytime average P unknown values were found in the coastal regions of China, with a maximum of 2.5 ppb h −1 in the Beijing-Tianjin-Hebei region. The P unknown produced a 60-250 % increase of OH, HO 2 , and RO 2 near the ground in the major cities of the coastal regions of China, and a 5-48 % increase of OH, HO 2 , and RO 2 in the daytime meridionalmean mixing ratios within 1000 m above the ground. When the three additional HONO sources were included, the photolysis of HONO was the second most important source in the OH production rate in Beijing, Shanghai, and Guangzhou before 10:00 LST with a maximum of 3.72 ppb h −1 and a corresponding P unknown contribution of 3.06 ppb h −1 in Beijing, whereas the reaction of HO 2 + NO (nitric oxide) was dominant after 10:00 LST with a maximum of 9.38 ppb h −1 and a corresponding P unknown contribution of 7.23 ppb h −1 in Beijing. The whole RO x cycle was accelerated by the three additional HONO sources, especially the P unknown . The daytime average OH production rate was enhanced by 0.67 due to the three additional HONO sources; [0.64]

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Nitrate postdeposition processes in Svalbard surface snow

et al. 2014

Self Cite

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The snowpack acts as a sink for atmospheric reactive nitrogen, but several postdeposition pathways have been reported to alter the concentration and isotopic composition of snow nitrate with implications for atmospheric boundary layer chemistry, ice core records, and terrestrial ecology following snow melt. Careful daily sampling of surface snow during winter (11-15 February 2010) and springtime (9 April to 5 May 2010) near Ny-Ålesund, Svalbard reveals a complex pattern of processes within the snowpack. Dry deposition was found to dominate over postdeposition losses, with a net nitrate deposition rate of (0.6 ± 0.2) μmol m À2 d À1 to homogeneous surface snow. At Ny-Ålesund, such surface dry deposition can either solely result from long-range atmospheric transport of oxidized nitrogen or include the redeposition of photolytic/bacterial emission originating from deeper snow layers. Our data further confirm that polar basin air masses bring 15 N-depleted nitrate to Svalbard, while high nitrate δ( 18 O) values only occur in connection with ozone-depleted air, and show that these signatures are reflected in the deposited nitrate. Such ozone-depleted air is attributed to active halogen chemistry in the air masses advected to the site. However, here the Ny-Ålesund surface snow was shown to have an active role in the halogen dynamics for this region, as indicated by declining bromide concentrations and increasing nitrate δ( 18 O), during high BrO (low-ozone) events. The data also indicate that the snowpack BrO-NO x cycling continued in postevent periods, when ambient ozone and BrO levels recovered.

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Occurrence of atmospheric nitrous acid in the urban area of Beijing (China)

Cited by 96 publications

References 108 publications

Impacts of Additional HONO Sources on Concentrations and Deposition of NO<sub>y</sub> in the Beijing-Tianjin-Hebei Region of China

Impacts of Additional HONO Sources on Concentrations and Deposition of NO<sub>y</sub> in the Beijing-Tianjin-Hebei Region of China

Impacts of an unknown daytime HONO source on the mixing ratio and budget of HONO, and hydroxyl, hydroperoxyl, and organic peroxy radicals, in the coastal regions of China

Nitrate postdeposition processes in Svalbard surface snow

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