A Compact Diode Laser Cavity Ring-Down Spectrometer for Atmospheric Measurements of NO&lt;SUB&gt;3&lt;/SUB&gt; and N&lt;SUB&gt;2&lt;/SUB&gt;O&lt;SUB&gt;5&lt;/SUB&gt; with Automated Zeroing and Calibration

Odame-Ankrah, Charles A.; Osthoff, Hans D.

doi:10.1366/11-06384

Cited by 24 publications

(31 citation statements)

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“…This gas stream was periodically added to the main inlet with the aid of a normally open two-way valve connected to a vacuum pump in a similar fashion as described earlier for N 2 O 5 and PAN (Tokarek et al, 2014;Odame-Ankrah and Osthoff, 2011 (Wieser and Berglund, 2009) and our previously observed ratios of 0.315 ± 0.003 in Calgary and 0.3065 ± 0.0002 in Pasadena (Mielke et al, 2013). The reason(s) for these differences is unclear but they may be a result of fractionation processes (Koehler and Wassenaar, 2010;Volpe et al, 1998), a topic outside the scope of this paper.…”

Section: Quantification Of Clno 2 By Iodide Chemical Ionization Mass mentioning

confidence: 99%

“…Further, the collisional dissociation chamber (CDC) was operated in declustering mode (−22.7 V) to break up ion clusters. Calibrations and matrix effect correction procedures and a time series of the PAN and PPN data were presented by Tokarek et al (2014 The CRDS used in this work was an amalgamated version of two instruments described earlier (Paul and Osthoff, 2010;Odame-Ankrah and Osthoff, 2011), called Improved Detection Instrument for Nitrogen Oxide Species (iDinos) (Odame-Ankrah, 2015). A schematic of the optical layout is shown in Fig.…”

Section: Quantification Of Clno 2 By Iodide Chemical Ionization Mass mentioning

confidence: 99%

“…Winds were initially from the NW and relatively light (4.8 ± 0.7 km h −1 ) and after 01:00 picked up in speed (to 8 ± 1 km h −1 ) and shifted to the W. Judging from the HYbrid Single-Particle Lagrangian Integrated Trajectory (HYS-PLIT) back trajectories (Stein et al, 2015), the upwind air had moved in from the coast, roughly from the direction of the city of Victoria, BC (Odame-Ankrah, 2015).…”

Section: Metrics Of Nocturnal Nitrogen Oxide Chemistrymentioning

confidence: 99%

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Low levels of nitryl chloride at ground level: nocturnal nitrogen oxides in the Lower Fraser Valley of British Columbia

et al. 2018

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Abstract. The nocturnal nitrogen oxides, which include the nitrate radical (NO3), dinitrogen pentoxide (N2O5), and its uptake product on chloride containing aerosol, nitryl chloride (ClNO2), can have profound impacts on the lifetime of NOx (= NO + NO2), radical budgets, and next-day photochemical ozone (O3) production, yet their abundances and chemistry are only sparsely constrained by ambient air measurements. Here, we present a measurement data set collected at a routine monitoring site near the Abbotsford International Airport (YXX) located approximately 30 km from the Pacific Ocean in the Lower Fraser Valley (LFV) on the west coast of British Columbia. Measurements were made from 20 July to 4 August 2012 and included mixing ratios of ClNO2, N2O5, NO, NO2, total odd nitrogen (NOy), O3, photolysis frequencies, and size distribution and composition of non-refractory submicron aerosol (PM1). At night, O3 was rapidly and often completely removed by dry deposition and by titration with NO of anthropogenic origin and unsaturated biogenic hydrocarbons in a shallow nocturnal inversion surface layer. The low nocturnal O3 mixing ratios and presence of strong chemical sinks for NO3 limited the extent of nocturnal nitrogen oxide chemistry at ground level. Consequently, mixing ratios of N2O5 and ClNO2 were low (< 30 and < 100 parts-per-trillion by volume (pptv) and median nocturnal peak values of 7.8 and 7.9 pptv, respectively). Mixing ratios of ClNO2 frequently peaked 1–2 h after sunrise rationalized by more efficient formation of ClNO2 in the nocturnal residual layer aloft than at the surface and the breakup of the nocturnal boundary layer structure in the morning. When quantifiable, production of ClNO2 from N2O5 was efficient and likely occurred predominantly on unquantified supermicron-sized or refractory sea-salt-derived aerosol. After sunrise, production of Cl radicals from photolysis of ClNO2 was negligible compared to production of OH from the reaction of O(1D) + H2O except for a short period after sunrise.

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Section: Quantification Of Clno 2 By Iodide Chemical Ionization Mass mentioning

confidence: 99%

Section: Quantification Of Clno 2 By Iodide Chemical Ionization Mass mentioning

confidence: 99%

Section: Metrics Of Nocturnal Nitrogen Oxide Chemistrymentioning

confidence: 99%

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Low levels of nitryl chloride at ground level: nocturnal nitrogen oxides in the Lower Fraser Valley of British Columbia

et al. 2018

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“…The residence time prior 130 to the ethane addition point (~2.0 s) suffices to destroy ROx radicals (via reaction with NO) prior to chemical amplification. Addition of either NO or ethane is on/off modulated using 2-way normally-open valves connected to a pump via 50 μm critical orifices (Lenox Laser, Glen Arm, MD) in a similar fashion as described earlier (Odame-Ankrah and Osthoff, 2011).…”

Section: Dual-channel Td-perca-crds 125mentioning

confidence: 99%

Quantification of peroxynitric acid and peroxyacyl nitrates using an ethane-based thermal dissociation peroxy radical chemical amplification cavity ring-down spectrometer

Taha¹,

Saowapon²,

Assad³

et al. 2018

Preprint

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“…Nitrate radical oxidation can lead to significant amounts of SOA on global and regional scales. Due to a lack of information on the identity and volatility of later-generation BVOC + NO 3 products, most models parameterize SOA formation separately from gas-phase chemistry using either the Odum two-product (Odum et al, 1996) fit, volatility basis set (VBS) fit, or fixed yield (Table 5). Based on the understanding of SOA pathways at the time, Hoyle et al (2007) found that up to 21 % of the global average SOA burden may be due to NO 3 oxidation, and Pye et al (2010) predicted ∼ 10 % of global SOA production was due to NO 3 .…”

Section: Influence On Organic Aerosolmentioning

confidence: 99%

Review response

Brown¹

2016

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Oxidation of biogenic volatile organic compounds (BVOC) by the nitrate radical (NO 3 ) represents one of the important interactions between anthropogenic emissions related to combustion and natural emissions from the biosphere. This interaction has been recognized for more than 3 decades, during which time a large body of research has emerged from laboratory, field, and modeling studies. NO 3 -BVOC reactions influence air quality, climate and visibility through regional and global budgets for reactive nitrogen (particularly organic nitrates), ozone, and organic aerosol. Despite its long history of research and the significance of this topic in atmospheric chemistry, a number of important uncertainties remain. These include an incomplete understanding of the rates, mechanisms, and organic aerosol yields for NO 3 -BVOC reactions, lack of constraints on the role of heterogeneous oxidative processes associated with the NO 3 radical, the difficulty of characterizing the spatial distributions of BVOC and NO 3 within the poorly mixed nocturnal atmosphere, and the challenge of constructing appropriate boundary layer schemes and non-photochemical mechanisms for use in state-of-the-art chemical transport and chemistry-climate models.This review is the result of a workshop of the same title held at the Georgia Institute of Technology in June 2015. The first half of the review summarizes the current literature on NO 3 -BVOC chemistry, with a particular focus on recent advances in instrumentation and models, and in organic nitrate and secondary organic aerosol (SOA) formation chemistry. Building on this current understanding, the second half of the review outlines impacts of NO 3 -BVOC chemistry on air quality and climate, and suggests critical research needs to better constrain this interaction to improve the predictive capabilities of atmospheric models. Isoprene Monoterpenes O 3 •NO 3 NO x Nitrates Aerosol Biogenic VOCs NO, NO 2 Air quality Climate Atmos.

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A Compact Diode Laser Cavity Ring-Down Spectrometer for Atmospheric Measurements of NO<SUB>3</SUB> and N<SUB>2</SUB>O<SUB>5</SUB> with Automated Zeroing and Calibration

Cited by 24 publications

References 25 publications

Low levels of nitryl chloride at ground level: nocturnal nitrogen oxides in the Lower Fraser Valley of British Columbia

Low levels of nitryl chloride at ground level: nocturnal nitrogen oxides in the Lower Fraser Valley of British Columbia

Quantification of peroxynitric acid and peroxyacyl nitrates using an ethane-based thermal dissociation peroxy radical chemical amplification cavity ring-down spectrometer

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