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Significant growth in surface ozone at Mace Head, Ireland, 1987–2003

Simmonds, P.G. / Derwent, R.G. / Manning, A.L. / Spain, G.

AbstractBackground ozone O3 observations at Mace Head on the west coast of Ireland since 1987 show a significant positive trend of 0.49±0.19ppbyear⁻¹ through to 2003. Increasing trends are observed for all seasons, with the largest trends during the winter season, 0.63±0.31ppbyear⁻¹ and the smallest trends during the summer, 0.39±0.25ppbyear^–1. However, this growth rate has not been consistent over time with a major anomaly evident in 1998–1999. This major O3 perturbation is correlated with variations of CO2, CO, CH4, H2 and CH3Cl, which are likely due to large-scale biomass burning events in tropical and boreal regions during 1997–1999 coupled with an intense El Niño event. Over the 16 years of observations background O3 has increased by about 8ppb (∼24%) in the clean oceanic sectors representative of the Northern Hemisphere marine boundary layer.

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Significant growth in surface ozone at Mace Head, Ireland, 1987–2003

Simmonds, P.G. / Derwent, R.G. / Manning, A.L. / Spain, G.

AbstractBackground ozone O3 observations at Mace Head on the west coast of Ireland since 1987 show a significant positive trend of 0.49±0.19ppbyear⁻¹ through to 2003. Increasing trends are observed for all seasons, with the largest trends during the winter season, 0.63±0.31ppbyear⁻¹ and the smallest trends during the summer, 0.39±0.25ppbyear^–1. However, this growth rate has not been consistent over time with a major anomaly evident in 1998–1999. This major O3 perturbation is correlated with variations of CO2, CO, CH4, H2 and CH3Cl, which are likely due to large-scale biomass burning events in tropical and boreal regions during 1997–1999 coupled with an intense El Niño event. Over the 16 years of observations background O3 has increased by about 8ppb (∼24%) in the clean oceanic sectors representative of the Northern Hemisphere marine boundary layer.

Significant growth in surface ozone at Mace Head, Ireland, 1987–2003

Simmonds, P.G. / Derwent, R.G. / Manning, A.L. / Spain, G.

AbstractBackground ozone O3 observations at Mace Head on the west coast of Ireland since 1987 show a significant positive trend of 0.49±0.19ppbyear⁻¹ through to 2003. Increasing trends are observed for all seasons, with the largest trends during the winter season, 0.63±0.31ppbyear⁻¹ and the smallest trends during the summer, 0.39±0.25ppbyear^–1. However, this growth rate has not been consistent over time with a major anomaly evident in 1998–1999. This major O3 perturbation is correlated with variations of CO2, CO, CH4, H2 and CH3Cl, which are likely due to large-scale biomass burning events in tropical and boreal regions during 1997–1999 coupled with an intense El Niño event. Over the 16 years of observations background O3 has increased by about 8ppb (∼24%) in the clean oceanic sectors representative of the Northern Hemisphere marine boundary layer.

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Title:

Significant growth in surface ozone at Mace Head, Ireland, 1987–2003

Contributors:

Simmonds, P.G. (author) / Derwent, R.G. (author) / Manning, A.L. (author) / Spain, G. (author)

Published in:

Atmospheric Environment ; 38 ; 4769-4778

Publication date:

2004-04-23

Size:

10 pages

ISSN:

DOI:

https://doi.org/10.1016/j.atmosenv.2004.04.036

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Ozone , Seasonal trends , Boreal biomass burning

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