Climatology of tropospheric ozone in southern Europe and its relation to potential vorticity

Beekmann, Matthias; Ancellet, Gérard; Mégie, G.

doi:10.1029/94jd00228

Cited by 125 publications

(86 citation statements)

References 51 publications

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“…Figure 2 shows that the mixing ratio of O 3 increased from ∼40 ppbv at ground to ∼65 ppbv around 8 km, and then increased rapidly above 8 km with a larger variability near the tropopause. Such a mean O 3 distribution is typical for locations in mid-latitudes (Logan, 1994;Beekmann et al, 1994;Thouret et al, 1998b;Cooper et al, 2005). In the PBL the O 3 concentrations increased sharply below 1 km and then remained fairly constant (∼52 ppbv) between 1 km and 2 km.…”

Section: Pooled Statistical Analysismentioning

confidence: 70%

“…While numerous studies were conducted in Europe, North America, and in Japan (Beekmann et al, 1994;Logan, 1985Logan, , 1994Liu et al, 1987;Oltmans et al, 1998;Monks, 2000;Pochanart et al, 2002), there is limited knowledge of the temporal and spatial distribution of tropospheric O 3 in China where rapid urbanization and industrial developments have been taken place in the latest two decades. Previous studies of emissions have projected sharp increases in the emissions of O 3 precursors in China, especially in the fastest growing coastal regions of eastern China (Akimoto and Narita, 1994;Streets et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Tropospheric ozone climatology over Beijing: analysis of aircraft data from the MOZAIC program

Ding

Wang²,

Thouret³

et al. 2008

Atmos. Chem. Phys.

279

197

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Abstract. Ozone (O 3 ) profiles recorded over Beijing from 1995 to 2005 by the Measurement of Ozone and Water Vapor by Airbus In-Service Aircraft (MOZAIC) program were analyzed to provide a first climatology of tropospheric O 3 over Beijing and the North China Plains (NCPs), one of the most populated and polluted regions in China. A pooled method was adopted in the data analysis to reduce the influence of irregular sampling frequency. The tropospheric O 3 over Beijing shows a seasonal and vertical distribution typical of midlatitude locations in the Northern Hemisphere, but has higher daytime concentrations in the lower troposphere, when compared to New York City, Tokyo, and Paris at similar latitude. The tropospheric O 3 over Beijing exhibits a common summer maximum and a winter minimum, with a broad summer maximum in the middle troposphere and a narrower early summer (June) peak in the lower troposphere. Examination of meteorological and satellite data suggests that the lower tropospheric O 3 maximum in June is a result of strong photochemical production, transport of regional pollution, and possibly also more intense burnings of biomass in CentralEastern China. Trajectory analysis indicates that in summer the regional pollution from the NCPs, maybe mixed with urban plumes from Beijing, played important roles on the high O 3 concentrations in the boundary layer, but had limited impact on the O 3 concentrations in the middle troposphere. A comparison of the data recorded before and after 2000 reveals that O 3 in the lower troposphere over Beijing had a strong positive trend (approximately 2% per year from 1995 to 2005) in contrast to a flat or a decreasing trend over Tokyo, New York City, and Paris, indicating worsening photochemical pollution in Beijing and the NCPs.

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Section: Pooled Statistical Analysismentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Tropospheric ozone climatology over Beijing: analysis of aircraft data from the MOZAIC program

Ding

Wang²,

Thouret³

et al. 2008

Atmos. Chem. Phys.

279

197

View full text Add to dashboard Cite

show abstract

“…The first method is based upon the numerous recent studies that have used O 3 :PV ratios as a tracer for stratospheric air and O 3 (e.g., [18,[43][44][45][46]). To calculate stratospheric O 3 mixing ratios we multiple GEOS-5 potential vorticity unit (PVU, 1 PVU = 10 6 K m 2 kg −1 s −1 ) values by an O 3 :PV ratio of 41 nmol mol −1 /PVU.…”

Section: Model-predicted Sources Of Ozonementioning

confidence: 99%

“…This value was chosen as it was derived from a study using TOLNet observations and model simulations to calculate O 3 :PV ratios associated with stratospheric transport at the location of the UAH TOLNet lidar site [18]. This value falls within the range of O 3 :PV ratios of 30-45 nmol mol −1 /PVU reported for stratospheric O 3 in past studies (e.g., [43][44][45][46]). A second method was applied in order to estimate the amount of O 3 measured by TOLNet which is associated with "pure" stratospheric intrusions based on methods described in [45].…”

Section: Model-predicted Sources Of Ozonementioning

confidence: 99%

Evaluating Summer-Time Ozone Enhancement Events in the Southeast United States

et al. 2016

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This study evaluates source attribution of ozone (O 3 ) in the southeast United States (US) within O 3 lamina observed by the University of Alabama in Huntsville (UAH) Tropospheric Ozone Lidar Network (TOLNet) system during June 2013. This research applies surface-level and airborne in situ data and chemical transport model simulations (GEOS-Chem) in order to quantify the impact of North American anthropogenic emissions, wildfires, lightning NO x , and long-range/stratospheric transport on the observed O 3 lamina. During the summer of 2013, two anomalous O 3 layers were observed: (1) a nocturnal near-surface enhancement and (2) a late evening elevated (3-6 km above ground level) O 3 lamina. A "brute force" zeroing method was applied to quantify the impact of individual emission sources and transport pathways on the vertical distribution of O 3 during the two observed lamina. Results show that the nocturnal O 3 enhancement on 12 June 2013 below 3 km was primarily due to wildfire emissions and the fact that daily maximum anthropogenic emission contributions occurred during these night-time hours. During the second case study it was predicted that above average contributions from long-range/stratospheric transport was largely contributing to the O 3 lamina observed between 3 and 6 km on 29 June 2013. Other models, remote-sensing observations, and ground-based/airborne in situ data agree with the source attribution predicted by GEOS-Chem simulations. Overall, this study demonstrates the dynamic atmospheric chemistry occurring in the southeast US and displays the various emission sources and transport processes impacting O 3 enhancements at different vertical levels of the troposphere.

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“…Each particle carries a certain amount of ozone so that initial ozone concentrations follow the relationship with PV: (Danielsen, 1968;Beekmann et al, 1994). Based on ozonesonde data for the lower stratosphere, Stohl et al (2000) found S = 60 (51) ppb/pvu for the month of June (July).…”

Section: Model Descriptionmentioning

confidence: 99%

Forecast, observation and modelling of a deep stratospheric intrusion event over Europe

Zanis

Trickl²,

Stohl³

et al. 2003

Atmos. Chem. Phys.

106

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Abstract. A wide range of measurements was carried out in central and southeastern Europe within the framework of the EU project STACCATO (Influence of StratosphereTroposphere Exchange in a Changing Climate on Atmospheric Transport and Oxidation Capacity) with the principle goal to create a comprehensive data set on stratospheric air intrusions into the troposphere along a rather frequently observed pathway over central Europe from the North Sea to the Mediterranean Sea. The measurements were based on predictions by suitable quasi-operational trajectory calculations using ECMWF forecast data. A predicted deep Stratosphere to Troposphere Transport (STT) event, encountered during the STACCATO period on 20-21 June 2001, was followed by the measurements network almost from its inception. Observations provide evidence that the intrusion affected large parts of central and southeastern Europe. Especially, the ozone lidar observations on 20-21 June 2001Correspondence to: P. Zanis (pzanis@geol.uoa.gr) at Garmisch-Partenkirchen, Germany captured the evolution of two marked tongues of high ozone with the first one descending to nearly 2 km, thus providing an excellent data set for model intercomparisons and validation. In addition, for the first time to our knowledge concurrent surface measurements of the cosmogenic radionuclides 10 Be and 7 Be and their ratio 10 Be/ 7 Be are presented together as stratospheric tracers in a case study of a stratospheric intrusion. The ozone tracer columns calculated with the FLEXPART model were found to be in good agreement with water vapour satellite images, capturing the evolution of the observed dry streamers of stratospheric origin. Furthermore, the time-height cross section of ozone tracer simulated with FLEXPART over Garmisch-Partenkirchen captures many details of the evolution of the two observed high-ozone filaments measured with the IFU lidar, thus demonstrating the considerable progress in model simulations. Finally, the modelled ozone (operationally available since October 1999) from the ECMWF (European Centre for Medium-Range Weather Forecasts) c European Geosciences Union 2003 764 P. Zanis et al.: A deep stratospheric intrusion event over Europe atmospheric model is shown to be in very good agreement with the observations during this case study, which provides the first successful validation of a chemical tracer that is derived operationally from a weather forecast model. This suggests that coupling chemistry and weather forecast models may significantly improve both weather and chemical forecasts in the future.

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Climatology of tropospheric ozone in southern Europe and its relation to potential vorticity

Cited by 125 publications

References 51 publications

Tropospheric ozone climatology over Beijing: analysis of aircraft data from the MOZAIC program

Tropospheric ozone climatology over Beijing: analysis of aircraft data from the MOZAIC program

Evaluating Summer-Time Ozone Enhancement Events in the Southeast United States

Forecast, observation and modelling of a deep stratospheric intrusion event over Europe

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