A comparison of CMAQ HONO predictions with observations from the Northeast Oxidant and Particle Study

Sarwar, Golam; Roselle, Shawn J.; Mathur, Rohit; Appel, Wyat; Dennis, Robin L.; Vogel, Bernhard

doi:10.1016/j.atmosenv.2007.12.065

Cited by 119 publications

(136 citation statements)

References 36 publications

Supporting

Mentioning

114

Contrasting

Order By: Relevance

“…Kinetics of reaction (R1) is shown to be first order in NO 2 (Kleffmann et al, 1998; and a function of relative humidity (Stutz et al, 2004). While previous modeling studies have considered R1 on ground surfaces (Sarwar et al, 2008), the role of relative humidity has not been tested. This work evaluates the impact of two different kinetic parameterizations for the NO 2 hydrolysis on surfaces.…”

Section: Hono Production Via Heterogeneous Chemistry and Photolytic Pmentioning

confidence: 99%

“…Kurtenbach et al (2001) sampled a 0.8% (AE1.0%) ratio in Germany, where the average vehicle fleet composition included around 75% of gasoline fuelled cars. The latter results have already been adopted by several modeling communities, such as the Models-3 Community from US-EPA and the CHIMERE community in France (Sarwar et al, 2008;INERIS, 2009). Therefore, a 0.8% HONO/NO x ratio is applied in this study to emissions from on-road transport.…”

Section: Hono Emissionsmentioning

confidence: 99%

“…Zhou et al, 2003), proposed that the photolysis of HNO 3 on ground and aerosol surfaces could be a potential HONO source. A modeling study over the eastern United States region showed contributions to HONO diurnal levels from that source up to 32% (Sarwar et al, 2008). However, such high contribution is not supported by chamber experiments (Rohrer et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Soot and other aerosol surfaces have been suggested as effective substrates for reaction (Ammann et al, 1998), which could be enhanced due to sunlight (Stemmler et al, 2007;Monge et al, 2010). However, the small surface area of aerosols when compared to ground surfaces and the rapid surface deactivation processes, raise the question of the relative contribution of reactions on particles to the atmospheric HONO budget (Sarwar et al, 2008). Modeling studies estimated the contribution of reactions on soot surfaces to HONO daily levels being lower than 2% (Li et al, 2010), even in highly polluted urban areas such as Mexico City.…”

Section: Introductionmentioning

confidence: 99%

“…Model predictions are compared to HONO observations from the DOMINO campaign performed in El Arenosillo station (Southern Spain) for the analyzed period (Sörgel et al, 2011). Previous modeling studies have included heterogeneous HONO production on ground surfaces as simple parameterizations considering constant surface to volume ratios (Vogel et al, 2003;Li et al, 2010), or neglecting the relative humidity influence on kinetics (Sarwar et al, 2008). Here, those variables influencing HONO heterogeneous production are characterized in detail and their effects analyzed.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Impact of HONO sources on the performance of mesoscale air quality models

Gonçalves

Dabdub

Chang

et al. 2012

Atmospheric Environment

View full text Add to dashboard Cite

a b s t r a c tNitrous acid (HONO) photolysis constitutes a primary source of OH in the early morning, which leads to changes in model gas-phase and particulate matter concentrations. However, state-of-the-art models of chemical mechanisms share a common representation of gas-phase chemistry leading to HONO that fails in reproducing the observed profiles. Hence, there is a growing interest in improving the definition of additional HONO sources within air quality models, i.e. direct emissions or heterogeneous reactions. In order to test their feasibility under atmospheric conditions, the WRF-ARW/HERMES/CMAQ modeling system is applied with high horizontal resolution (4 Â 4 km 2 ) to Spain for November 24e27, 2008. HONO modeled sources include: (1) direct emissions from on-road transport; NO 2 hydrolysis on aerosol and ground surfaces, the latter with (2) kinetics depending exclusively on available surfaces for reaction and (3) refined kinetics considering also relative humidity dependence; and (4) photoenhanced NO 2 reduction on ground surfaces. The DOMINO measurement campaign performed in El Arenosillo (Southern Spain) provides valuable HONO observations. Modeled HONO results are consistently below observations, even when the most effective scenario is assessed, corresponding to contributions of direct emissions and NO 2 hydrolysis with the simplest kinetics parameterization. With the additional sources of HONO, PM 2.5 predictions can be up to 14% larger in urban areas. Quantified impacts on secondary pollutants have to be taken as a low threshold, due to the proven underestimation of HONO levels. It is fundamental to improve HONO sources definition within air quality models, both for the scientific community and decision makers.

show abstract

Section: Hono Production Via Heterogeneous Chemistry and Photolytic Pmentioning

confidence: 99%

Section: Hono Emissionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Impact of HONO sources on the performance of mesoscale air quality models

Gonçalves

Dabdub

Chang

et al. 2012

Atmospheric Environment

View full text Add to dashboard Cite

show abstract

Large conversion rates of NO₂ to HNO₂ observed in air masses from the South China Sea: Evidence of strong production at sea surface?

Zha

Xue

Wang

et al. 2014

Geophysical Research Letters

View full text Add to dashboard Cite

Nitrous acid (HONO) plays important roles in tropospheric chemistry, but its source(s) are not completely understood. Here we analyze measurements of HONO, nitrogen dioxide (NO 2 ), and related parameters at a coastal site in Hong Kong during September-December 2012. The nocturnal NO 2 -to-HONO conversion rates were estimated in air masses passing over land and sea surfaces. The conversion rates in the "sea cases" (3.17-3.36 × 10 À2 h À1 ) were significantly higher than those in the "land cases" in our study(1.20-1.30 × 10 À2 h À1) and in previous studies by others. These results suggest that air-sea interactions may be a significant source of atmospheric HONO and need to be considered in chemical transport models.

show abstract

Potential sources of nitrous acid (HONO) and their impacts on ozone: A WRF‐Chem study in a polluted subtropical region

et al. 2016

View full text Add to dashboard Cite

Current chemical transport models commonly undersimulate the atmospheric concentration of nitrous acid (HONO), which plays an important role in atmospheric chemistry, due to the lack or inappropriate representations of some sources in the models. In the present study, we parameterized up-to-date HONO sources into a state-of-the-art three-dimensional chemical transport model (Weather Research and Forecasting model coupled with Chemistry: WRF-Chem). These sources included (1) heterogeneous reactions on ground surfaces with the photoenhanced effect on HONO production, (2) photoenhanced reactions on aerosol surfaces, (3) direct vehicle and vessel emissions, (4) potential conversion of NO 2 at the ocean surface, and (5) emissions from soil bacteria. The revised WRF-Chem was applied to explore the sources of the high HONO concentrations (0.45-2.71 ppb) observed at a suburban site located within complex land types (with artificial land covers, ocean, and forests) in Hong Kong. With the addition of these sources, the revised model substantially reproduced the observed HONO levels. The heterogeneous conversions of NO 2 on ground surfaces dominated HONO sources contributing about 42% to the observed HONO mixing ratios, with emissions from soil bacterial contributing around 29%, followed by the oceanic source (~9%), photochemical formation via NO and OH (~6%), conversion on aerosol surfaces (~3%), and traffic emissions (~2%). The results suggest that HONO sources in suburban areas could be more complex and diverse than those in urban or rural areas and that the bacterial and/or ocean processes need to be considered in HONO production in forested and/or coastal areas. Sensitivity tests showed that the simulated HONO was sensitive to the uptake coefficient of NO 2 on the surfaces. Incorporation of the aforementioned HONO sources significantly improved the simulations of ozone, resulting in increases of ground-level ozone concentrations by 6-12% over urban areas in Hong Kong and the Pearl River Delta region. This result highlights the importance of accurately representing HONO sources in simulations of secondary pollutants over polluted regions. ZHANG ET AL.MODELING HONO IN A SUBTROPICAL REGION 3645

show abstract

A comparison of CMAQ HONO predictions with observations from the Northeast Oxidant and Particle Study

Cited by 119 publications

References 36 publications

Impact of HONO sources on the performance of mesoscale air quality models

Impact of HONO sources on the performance of mesoscale air quality models

Large conversion rates of NO₂ to HNO₂ observed in air masses from the South China Sea: Evidence of strong production at sea surface?

Potential sources of nitrous acid (HONO) and their impacts on ozone: A WRF‐Chem study in a polluted subtropical region

Contact Info

Product

Resources

About

A comparison of CMAQ HONO predictions with observations from the Northeast Oxidant and Particle Study

Cited by 119 publications

References 36 publications

Impact of HONO sources on the performance of mesoscale air quality models

Impact of HONO sources on the performance of mesoscale air quality models

Large conversion rates of NO2 to HNO2 observed in air masses from the South China Sea: Evidence of strong production at sea surface?

Potential sources of nitrous acid (HONO) and their impacts on ozone: A WRF‐Chem study in a polluted subtropical region

Contact Info

Product

Resources

About

Large conversion rates of NO₂ to HNO₂ observed in air masses from the South China Sea: Evidence of strong production at sea surface?