Investigating ozone high levels and the role of sea breeze on its transport

Objective & Hypothesis:This works intends to investigate the ozone episodes reported in three different monitoring sitesdistributed along the Central region of Portugal (from the coast to inland direction).

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Key Findings & Data:The episodes are then analysed in terms of meteorological data (surface and verticalprofiles) obtained with the WRF model and also using backtrajectories obtained with the HYSPLIT model.The integration of both results, together with the ozone and NO2 precursor concentration time series,allowed to conclude about the different origin of ozone in the two episodes.

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Conclusion & Impact:The second episode studied does not show so clearly this influence.

🔬Design:Modeling & Simulation

📍Scope:Comprehensive Sample

⚙️Variables:Domain Parameters

Özet

This works intends to investigate the ozone episodes reported in three different monitoring sitesdistributed along the Central region of Portugal (from the coast to inland direction). Ozone data timeseries are first analysed according to the legislation thresholds fulfilment (information threshold andtarget value) and two episodes are selected according to the magnitude and simultaneously exceedancesat the three sites. The episodes are then analysed in terms of meteorological data (surface and verticalprofiles) obtained with the WRF model and also using backtrajectories obtained with the HYSPLIT model.The integration of both results, together with the ozone and NO2 precursor concentration time series,allowed to conclude about the different origin of ozone in the two episodes. A sea breeze circulation ispresent in the first episode, inducing the transport of this pollutant and its precursors from the coast toinland (about 30 km), which is verified by the wind patterns and vertical profiles and by the daily profileof O3 measured at the three sites. The second episode studied does not show so clearly this influence.

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Cite This Article

MONTEİRO, A., GAMA, C., CANDİDO, M., RİBEİRO, I., CARVALHO, D., LOPES, M. (2016). Investigating ozone high levels and the role of sea breeze on its transport. Atmospheric Pollution Research, Cilt: 7 - Sayı: 2, 339–347. https://ajindex.com/articles/351532

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