The composition and vertical distribution of volatile organic compounds in southwestern Germany, eastern France and northern Switzerland during the TRACT campaign in September 1992

Koßmann, M.; Vogel, H.; Vogel, Bernhard; Vögtlin, R.; Corsmeier, U.; Fiedler, F.; Klemm, Otto; Schläger, Hans

doi:10.1016/s0079-1946(97)81137-8

Cited by 12 publications

(3 citation statements)

References 5 publications

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“…Aircraft-based measurements have a larger payload capacity, comprehensive coverage, but lower data resolution (especially at lower altitudes) and a higher cost (5-6 km). Many vertical studies on VOCs have shown that VOC concentrations generally decrease with increasing height [33][34][35][36]. At the same time, they were affected by the temperature inversion layer and often accumulated in that layer [28,34].…”

Section: Introductionmentioning

confidence: 99%

“…Wu et al [27] conducted studies on VOCs in winter and summer in the Shijiazhuang area and found that the vertical decrease in VOCs concentration was greater in the stable boundary layer than in the mixing layer. Koßmann et al [35] found that as the altitude increased, isopentane with high reactivity decreased faster than ethane with low reactivity. Zhang et al [36] studied the photochemical reactivity of low-tropospheric VOCs species in Shanghai suburbs and found that the dominant species in OFP at different altitudes were alkenes (50~350 m), aromatics (350~700 m), and alkenes (700~1000 m), respectively.…”

Section: Introductionmentioning

confidence: 99%

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Vertical Features of Volatile Organic Compounds and Their Potential Photochemical Reactivities in Boundary Layer Revealed by In-Situ Observations and Satellite Retrieval

Yang,

Zhu,

Shi

et al. 2024

Remote Sensing

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Based on in-situ vertical observations of volatile organic compounds (VOCs) in the lower troposphere (0–1.0 km) in Nanjing, China, during the summer and autumn, we analyzed the VOCs vertical profiles, diurnal variation, and their impact factors in meteorology and photochemistry. The results showed that almost all the concentrations of VOC species decreased with height, similar to the profiles of primary air pollutants, as expected. However, we found the ratios of inactive species (e.g., acetylene) and secondary VOCs (e.g., ketones and aldehydes) in total VOCs (TVOCs) increased with height. Combined with satellite-retrieved data, we found the average HCHO tropospheric column concentrations were 2.0 times higher in the summer than in the autumn. While the average of tropospheric NO2 column concentrations was 3.0 times lower in the summer than in the autumn, the seasonal differences in the ratio of oxygenated VOCs (OVOCs) to NO2 (e.g., HCHO/NO2) shown in TROPOMI satellite-retrieved data were consistent with in-situ observations (e.g., acetone/NO2). On average, during autumn daytime, the mixing layer (ML), stable boundary layer (SBL), and residual layer (RL) had OH loss rates (LOH) of 6.9, 6.3, and 5.5 s−1, respectively. The LOH of alkenes was the largest in the ML, while the LOH of aromatics was the largest in the SBL and RL. At autumn night, the NO3 loss rates (LNO3) in the SBL and RL were 2.0 × 10−2 and 1.6 × 10−2 s−1, respectively, and the LNO3 of aromatics was the largest in the SBL and RL. In the daytime of summer, the LOH of VOCs was ~40% lower than that in autumn in all layers, while there was no significant difference in LNO3 at night between the two seasons. This study provides data support and a theoretical basis for VOC composite pollution control in the Nanjing region.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vertical Features of Volatile Organic Compounds and Their Potential Photochemical Reactivities in Boundary Layer Revealed by In-Situ Observations and Satellite Retrieval

Yang,

Zhu,

Shi

et al. 2024

Remote Sensing

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“…A typical assumption is that longer-lived species such as OVOC are well mixed within the ABL [Borrego and Incecik, 2012] and chemical lifetimes are much longer than turbulent mixing time scales. However, observations highlight the vertical and spatial inhomogeneities in VOC oxidation products [Koßmann et al, 1996;Velasco et al, 2008;Wöhrnschimmel et al, 2006]. Aircraft data such as from the recent Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) field campaign can be used to address these questions.…”

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confidence: 99%

Large‐eddy simulation of biogenic VOC chemistry during the DISCOVER‐AQ 2011 campaign

Barth

Chen

et al. 2016

JGR Atmospheres

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Biogenic volatile organic compounds (BVOCs) are oxidized quickly in the atmosphere to form oxygenated VOC (OVOC) and play crucial roles in the formation of ozone and secondary organic aerosols. We use the National Center for Atmospheric Research's large‐eddy simulation model and Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality 2011 flight data to understand the role of boundary layer turbulence on the atmospheric chemistry of key BVOC species and their oxidation products. We simulate three distinct convective environments during the campaign, representing fair weather conditions (case 1: 1 July), a convective event dominated by southwesterly flow (case 2: 11 July), and a polluted event with high temperature and convection (case 3: 29 July). Isoprene segregation is greatest in the lower boundary layer under warm and convective conditions, reaching up to a 10% reduction in the isoprene‐OH reaction rate. Under warm and convective conditions, the BVOC lifetimes lengthen due to increased isoprene emission, elevated initial chemical concentrations, and OH competition. Although turbulence‐driven segregation has less influence on the OVOC species, convection mixes more OVOC into the upper atmospheric boundary layer (ABL) and increases the total OH reactivity. Production and loss rates of ozone above 2 km in all the three cases indicate in situ ozone formation in addition to vertical convective transport of ozone from the surface and aloft, consistent with the increased contribution of OH reactivity from OVOC. Together, these results show that total OH reactivity in the ABL increases under warmer and stronger convective conditions due to enhanced isoprene emission and the OVOC contribution to ozone formation.

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TRACT: Transport of Air Pollutants over Complex Terrain

Fiedler

Borrell

2000

Exchange and Transport of Air Pollutants Over Complex Terrain and the Sea

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The composition and vertical distribution of volatile organic compounds in southwestern Germany, eastern France and northern Switzerland during the TRACT campaign in September 1992

Cited by 12 publications

References 5 publications

Vertical Features of Volatile Organic Compounds and Their Potential Photochemical Reactivities in Boundary Layer Revealed by In-Situ Observations and Satellite Retrieval

Vertical Features of Volatile Organic Compounds and Their Potential Photochemical Reactivities in Boundary Layer Revealed by In-Situ Observations and Satellite Retrieval

Large‐eddy simulation of biogenic VOC chemistry during the DISCOVER‐AQ 2011 campaign

TRACT: Transport of Air Pollutants over Complex Terrain

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