Simulated Summertime Regional Ground-Level Ozone Concentrations over Greece

Poupkou, A.; Melas, Dimitrios; Ziomas, I.; Symeonidis, Panagiotis; Lisaridis, I.; Gerasopoulos, E.; Zerefos, C. S.

doi:10.1007/s11270-008-9766-0

Cited by 23 publications

(16 citation statements)

References 39 publications

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“…However, local emissions and regional pollution transport still contribute to the poor air quality of the city (Katragkou et al 2009;Poupkou et al 2009). The 24-h EU limit value for PM 10 (50 μg/m 3 ) is In the GTA, an official monitoring network of seven air pollution stations is being operating by the Region of Central Macedonia (RCM).…”

Section: Methodsmentioning

confidence: 99%

Climatology of Discomfort Index and Air Quality Index in a Large Urban Mediterranean Agglomeration

Poupkou

Nastos

Melas

et al. 2011

Water Air Soil Pollut

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The paper studies the climatology of the Discomfort Index (DI) and the Common Air Quality Index (CAQI) in a large Mediterranean urban center (Greater Thessaloniki Area), examines the relations between the indices and the climatic conditions in the study area and investigates the linkage between the Urban Heat Island (UHI) effect and the enhanced discomfort and poor air quality in the city center. Discomfort conditions are more enhanced during July and August. Atmospheric conditions when the population suffers discomfort and feels severe stress are found mainly in the summer season hours with total frequency that can be up to about 4% in a month. Throughout the year, air quality conditions are unhealthier in the stations of urban characterization. Very high daily CAQI values are more frequent during the cold period (about 14%) than during the warm period (1-2%) of the year in the urban stations. Daily DI≥24°C could be more associated to increased temperature than relative humidity and is strongly related to high and very high CAQI values. During summer, when daily CAQI is ≥76, the feeling of discomfort is the most probable. Consequently, a strong synergy between discomfort and bad air quality exists in summertime. High and very high CAQI values and the discomfort feeling by the majority of the population are related to stagnant atmospheric conditions. During summer season, the poor air quality and the unfavorable comfort conditions for the majority of the population in the city center are associated with the greater frequency of a more intense UHI effect. The above phenomenon is more pronounced during nighttime than daytime.

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Section: Methodsmentioning

confidence: 99%

Climatology of Discomfort Index and Air Quality Index in a Large Urban Mediterranean Agglomeration

Poupkou

Nastos

Melas

et al. 2011

Water Air Soil Pollut

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“…One is the direct transport of O 3 from urban areas, and the other is the transport of its precursors like NOx, VOC, CO, CH 4 (NMHC) (Trainer et al 1987), followed by in-situ photochemical O 3 production. In recent years, considerable work has been carried out to explore the influence of surface O 3 on climate change in various parts of the world (Oltmans and Komhyr 1976;Low et al 1992;Mazzeo et al 2005;Filella and Peñuelas 2006;Pudasainee et al 2006;Helmig et al 2007;Geng et al 2008;Saliba et al 2008;Poupkou et al 2009;Sicard et al 2009;Teixeira et al 2009;Geddes et al 2009;Yin Shan et al 2010;Hosseinibalam et al 2010;Banan and Latif 2011;Notario et al 2011). O 3 concentration is influenced by meteorological parameters including wind speed, wind direction, temperature and relative humidity (Lyons and Cole 1976;Aneja and Das 1995) over a location.…”

Section: Introductionmentioning

confidence: 99%

Variations in surface ozone and NOx at Kannur: a tropical, coastal site in India

2012

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Continuous measurements of surface ozone (O 3 ), NOx (NO + NO 2 ) and meteorological parameters have been made in Kannur (11.9°N, 75.4°E, 5 m asl), India from November 2009 to October 2010. It was observed that O 3 and NOx showed distinct diurnal and seasonal variabilities at this site. The annual average diurnal profile of O 3 showed a peak of (30.3±10.4) ppbv in the late afternoon and a minimum of (3.2±0.7) ppbv in the early morning. The maximum value of O 3 mixing ratio was observed in winter (44±3.1) ppbv and minimum during monsoon (18.46±3.5) ppbv. The rate of production of O 3 was found to be higher in December (10.1 ppbv/h) and lower in July (1.8 ppbv/h) during the time interval 0800-1000 h. A correlation coefficient of 0.52 for the relationship between O 3 and [NO 2 ]/[NO] reveals the role of NO 2 photolysis that generates O 3 at this site. The correlation between O 3 and meteorological parameters indicate the influence of seasonal changes on O 3 production. Investigations were further extended to explore the week day weekend variations in O 3 mixing ratio at an urban site reveals the enhancement of O 3 . The variations of O 3 mixing ratio with seasonal air mass flows were elucidated with the aid of backward air trajectories. This study also indicates how vapor phase organic species present in the ambient air at this location may influence the complex chemistry involving (VOCs) that enhances the production of O 3 at this location.

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“…On the other hand, to make a comparison against a long-term application, current IOA values (0.65÷ 0.74) performed over a 5-month period (apart from a 3.5-month long one by one station, actually) prove to be higher, on average, than those achieved, e.g., within the MM5/UAM-V application over two largest Greek urban centers (Athens and Thessaloniki), where IOA values over a 1.5-month period range from 0.55 to 0.69 (Poupkou et al 2009). Another comparison can be made against the AIRPACT application (Vaughan et al 2004), where a NGE value ranging from 0.35 to 0.63 was found over a 1-month period (August 2001) being higher, on average, than the one achieved in the present 5-month application (0.25÷ 0.36), even though the latter results by considering the 120-µg/m 3 ozone cutoff value, actually.…”

Section: Hourly Concentrationsmentioning

confidence: 79%

“…Over the last decade, a number of integrated modeling systems based on a Eulerian photochemical dispersion model have been developed to assess regional-scale ozone pollution, e.g., Weather Research and Forecasting (WRF)/Comprehensive Air quality Model with extensions (CAMx) and fifth-generation Penn State-NCAR Mesoscale Model (MM5)/CAMx (Soong et al 2006), MM5/Urban Airshed Model V (UAM-V; Poupkou et al 2009), Regional Atmospheric Modeling System (RAMS)/CIT (Martins and Andrade 2008). Aiming at the same goal, in the present work, a forecasting system based on the CALGRID Eulerian photochemical dispersion model (Scire et al 1989) has been developed, which is implemented as an experimental operational web service at the LaMMA Consortium to forecast ozone pollution over Tuscany region, Italy.…”

Section: Developing the Modeling System: Characteristics And Goalsmentioning

confidence: 99%

Implementing an Operational Ozone Forecasting System Based on WRF/CALMET/CALGRID Models: a 5-Month Case Study over Tuscany, Italy

Gualtieri

2009

Water Air Soil Pollut

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An ozone forecasting system has been developed based on the CALGRID photochemical dispersion model. The system is implemented as an experimental operational web service at the LaMMA Consortium to forecast ozone pollution over Tuscany region, Italy. It takes advantage of two daily forecasts, one reproducing the meteorology over Tuscany and the other providing chemical boundary conditions. Meteorological forecasts are performed by the Weather Research and Forecasting Nonhydrostatic Mesoscale Model (WRF-NMM) mesoscale model, which is operative at LaMMA for the daily forecasting service. Calculated at a 10-km resolution, WRF-NMM outputs are downscaled to the 4-km system's final resolution through the CALMET diagnostic model. Daily boundary conditions are forecast by the CHIMERE dispersion model of the PREV'AIR European air quality forecasting system. Since CHIMERE uses the MELCHIOR chemical mechanism, a suitable species conversion was required to the SAPRC-90 mechanism implemented in CALGRID. Emission data are provided by the Regional Inventory of the Sources of Emissions of the Tuscan Regional Authority. Each day, a 96-h simulation is run starting from 00 UTC of the preceding day, used to merely initialize the system, resulting in a 3-day forecast of ozone from today issued to the web in terms of ozone daily mean and maximum concentrations over Tuscany. The system was experimentally run over May to September 2007, resulting in a good accuracy compared to station observations.

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Simulated Summertime Regional Ground-Level Ozone Concentrations over Greece

Cited by 23 publications

References 39 publications

Climatology of Discomfort Index and Air Quality Index in a Large Urban Mediterranean Agglomeration

Climatology of Discomfort Index and Air Quality Index in a Large Urban Mediterranean Agglomeration

Variations in surface ozone and NOx at Kannur: a tropical, coastal site in India

Implementing an Operational Ozone Forecasting System Based on WRF/CALMET/CALGRID Models: a 5-Month Case Study over Tuscany, Italy

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