Investigations of emissions and heterogeneous formation of HONO in a road traffic tunnel

Kurtenbach, R.; Becker, Karl‐Heinz; Gomes, Jewel A.; Kleffmann, J.; Lörzer, J. C.; Spittler, M.; Wiesen, Peter; Ackermann, R.; Geyer, Andreas; Platt, U.

doi:10.1016/s1352-2310(01)00138-8

Cited by 394 publications

(348 citation statements)

References 19 publications

Supporting

Mentioning

317

Contrasting

Unclassified

Order By: Relevance

“…Direct emissions from combustion processes (i.e. vehicles exhaust, biomass burning) also contribute, which may account for a large proportion of observed HONO in heavy polluted areas (Kirchstetter et al 1996;Kurtenbach et al 2001).…”

Section: Responsible Editor: Gerhard Lammelmentioning

confidence: 99%

Measurements of nitrous acid (HONO) in urban area of Shanghai, China

Bernard

Cazaunau

Grosselin

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

Nitrous acid (HONO), as a precursor of the hydroxyl radical (OH), plays an important role in the photochemistry of the troposphere, especially in the polluted urban atmosphere. A field campaign was conducted to measure atmospheric HONO concentration and that of other pollutants (such as NO 2 and particle mass concentration) in the autumn of 2009 at Shanghai urban areas. HONO mixing ratios were simultaneously measured by three different techniques: long path absorption photometer (LOPAP), differential optical absorption spectroscopy (DOAS) and chemical ionization mass spectrometer (CIMS). The measurements showed that the mixing ratios of HONO were highly variable and depended strongly on meteorological parameters. The HONO levels ranged from 0.5 to 7 ppb with maximum values during early morning and minimum levels during late afternoon. The three instruments reproduced consistent diurnal pattern of HONO concentrations with higher concentration during the night compared to the daylight hours. Comparison of HONO LOPAP /HONO CIMS ratios during daytime and nighttime periods exhibited a non-systematic disagreement of 0.93 and 1.16, respectively. This would indicate different chemical compositions of sampled air for the LOPAP and the CIMS instruments during daytime and nighttime periods, which have possibly affected measurements. Mean HONO concentration reported by LOPAP was 33 % higher than by DOAS on the whole period with no significant difference between daytime and nighttime periods. This revealed a systematic deviation from both instruments. The present data provides complementary information of HONO ambient levels in the atmosphere of Shanghai urban areas.

show abstract

Section: Responsible Editor: Gerhard Lammelmentioning

confidence: 99%

Measurements of nitrous acid (HONO) in urban area of Shanghai, China

Bernard

Cazaunau

Grosselin

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…High HONO could come from combustion engines, i.e., diesel vehicles (Kurtenbach et al, 2001), or heterogeneous reaction of NO 2 -HONO system (Su et al, 2008;Yu et al, 2009). The HNO 2 could be rapidly photolyzed (wavelengths ≤ 400 nm) by "OH push" after sunrise and accumulated mostly at night (Platt and Perner, 1980;Calvert et al, 1994;Staffelbach et al, 1997;Acker et al, 2005).…”

Section: Acid and Base Gasesmentioning

confidence: 99%

Size Distribution and Water Soluble Ions of Ambient Particulate Matter on Episode and Non-episode Days in Southern Taiwan

Tsai

Lin

Yao

et al. 2012

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

Distribution of inorganic ions at an urban/industrial/agricultural complex was investigated in southern Taiwan during particulate matter (PM) episode and non-episode periods, and the Micro Orifice Uniform Deposit Impactor (MOUDI) and nano-MOUDI were employed to take PM samples. In PM episode periods, the PM significantly increased in mass concentration and in the size ranges of 0.1-1.0 and 1.8-18 μm at the site. Sulfate, nitrate and ammonium were the dominant ionic species and contributed a large fraction of PM mass in different sizes. The nitrate concentration increase on episode days could be attributed to the increase of precursor gas-NO 2 concentration during these periods. In addition, SO 2 was significantly correlated to SO 4 2-in the nuclei mode (PM 0.1 ), which indicated that the gas had transferred into particulate matter. The molar equivalent ratio of {[NO

show abstract

“…[38] While the reactions of NO with peroxy radicals are practically the only source of O x in the troposphere (direct NO 2 emission is mostly negligible [Kurtenbach et al, 2001;Sawyer et al, 2000]), there are many different sinks. Here we investigate how much the observed daytime NO 3 contributed to the loss of O x at La Porte.…”

Section: No 3 Daytime Measurementsmentioning

confidence: 99%

Direct observations of daytime NO₃: Implications for urban boundary layer chemistry

et al. 2003

Self Cite

View full text Add to dashboard Cite

[1] The nitrate radical (NO 3 ) is the dominant atmospheric oxidant during the night in most environments. During the day, however, NO 3 has thus far been considered insignificant. Here we present daytime measurements of NO 3 by Differential Optical Absorption Spectroscopy near Houston, Texas, during the Texas Air Quality Study 2000. On 3 consecutive days in August/September 2000, NO 3 reached levels from $5 ppt 3 hours before sunset to 31 ppt around sunset. Daytime NO 3 had a negligible effect on the photostationary state (PSS) between O 3 and NO x , with the exception of the last hour before sunset, when it significantly accelerated NO-to-NO 2 conversion. On August 31, chemical reactions involving NO 3 destroyed 8 (±4) ppb O x (= O 3 + NO 2 ) during the day and 27 (±6) ppb at night. NO 3 chemistry contributed 10 (±7)% to the total O x loss during the daytime, and 28% (±18%) integrated over a 24-hour period. It therefore played an important role in the O x budget. NO 3 also contributed significantly to the daytime oxidation of hydrocarbons such as monoterpenes and phenol in Houston. The observed daytime NO 3 mixing ratios can be described as a function of O 3 and NO x . Above [NO x ]/[O 3 ] ratios of 3%, daytime NO 3 becomes independent of NO x and proportional to the square of O 3 . Our calculations indicate that elevated (>1 ppt) NO 3 levels can be present whenever ozone mixing ratios exceed typical urban smog levels of 100 ppb.

show abstract

Investigations of emissions and heterogeneous formation of HONO in a road traffic tunnel

Cited by 394 publications

References 19 publications

Measurements of nitrous acid (HONO) in urban area of Shanghai, China

Measurements of nitrous acid (HONO) in urban area of Shanghai, China

Size Distribution and Water Soluble Ions of Ambient Particulate Matter on Episode and Non-episode Days in Southern Taiwan

Direct observations of daytime NO₃: Implications for urban boundary layer chemistry

Contact Info

Product

Resources

About

Investigations of emissions and heterogeneous formation of HONO in a road traffic tunnel

Cited by 394 publications

References 19 publications

Measurements of nitrous acid (HONO) in urban area of Shanghai, China

Measurements of nitrous acid (HONO) in urban area of Shanghai, China

Size Distribution and Water Soluble Ions of Ambient Particulate Matter on Episode and Non-episode Days in Southern Taiwan

Direct observations of daytime NO3: Implications for urban boundary layer chemistry

Contact Info

Product

Resources

About

Direct observations of daytime NO₃: Implications for urban boundary layer chemistry