Characteristics of  intercontinental transport of tropospheric ozone from Africa to Asia

Han, Han; Liu, Jane; Yuan, Huiling; Zhu, Yong‐Guan; Wu, Yue; Yan, Yajing; Ding, Aijun

doi:10.5194/acp-2017-728

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…This finding agrees with that of Kleanthous et al (2014) that local photochemistry was responsible for only 3 nmol mol −1 , i.e., about 6% of O 3 levels, according to analysis of data from the Agia Marina station over the period 1997−2012. These results show that the transport of air masses over long distances (Han et al 2018) is responsible for much of the recorded O 3 in Cyprus and cannot be restricted by only local regulations. Thus, O 3 is expected to be a major environmental problem in the country, with levels that will possibly exceed the permissible limits.…”

Section: Spatiotemporal Distribution Of Surface O 3 Levelsmentioning

confidence: 78%

Spatiotemporal variations of ozone exposure and its risks to vegetation and human health in Cyprus: an analysis across a gradient of altitudes

Agathokleous

Saitanis

Savvides³

et al. 2022

J. For. Res.

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Ground-level ozone (O3) affects vegetation and threatens environmental health when levels exceed critical values, above which adverse effects are expected. Cyprus is expected to be a hotspot for O3 concentrations due to its unique position in the eastern Mediterranean, receiving air masses from Europe, African, and Asian continents, and experiencing a warm Mediterranean climate. In Cyprus, the spatiotemporal features of O3 are poorly understood and the potential risks for forest health have not been explored. We evaluated O3 and nitrogen oxides (NO and NO2) at four regional background stations at different altitudes over 2014−2016. O3 risks to vegetation and human health were estimated by calculating accumulated O3 exposure over a threshold of 40 nmol mol−1 (AOT40) and cumulative exposure to mixing ratios above 35 nmol mol−1 (SOMO35) indices. The data reveal that mean O3 concentrations follow a seasonal pattern, with higher levels in spring (51.8 nmol mol−1) and summer (53.2 nmol mol−1) and lower levels in autumn (46.9 nmol mol−1) and winter (43.3 nmol mol−1). The highest mean O3 exposure (59.5 nmol mol−1) in summer occurred at the high elevation station Mt. Troodos (1819 m a.s.l.). Increasing (decreasing) altitudinal gradients were found for O3 (NOx), driven by summer–winter differences. The diurnal patterns of O3 showed little variation. Only at the lowest altitude O3 displayed a typical O3 diurnal pattern, with hourly differences smaller than 15 nmol mol−1. Accumulated O3 exposures at all stations and in all years exceeded the European Union’s limits for the protection of vegetation, with average values of 3-month (limit: 3000 nmol mol−1 h) and 6-month (limit: 5000 nmol mol−1 h) AOT40 for crops and forests of 16,564 and 31,836 nmol mol−1 h, respectively. O3 exposures were considerably high for human health, with an average SOMO35 value of 7270 nmol mol−1 days across stations and years. The results indicate that O3 is a major environmental and public health issue in Cyprus, and policies must be adopted to mitigate O3 precursor emissions at local and regional scales.

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Section: Spatiotemporal Distribution Of Surface O 3 Levelsmentioning

confidence: 78%

Spatiotemporal variations of ozone exposure and its risks to vegetation and human health in Cyprus: an analysis across a gradient of altitudes

Agathokleous

Saitanis

Savvides³

et al. 2022

J. For. Res.

View full text Add to dashboard Cite

show abstract

“…SO2 concentrations rose during REG and MED, surely due to prevalence of sea to land winds carrying maritime transport emissions to CLL. Notice that O3 concentrations decrease during AF, probably due to a combination of factors, such us boundary layer compression, which provokes enhancement of O3 depleting compounds, the consumption of O3 by mineral dust particles (Soler et al, 2016), and the presumably lower O3 concentrations intrinsically associated to air masses from AF (Han et al, 2018). Regional scenarios, encompassing accumulation processes, present also high values.…”

Section: Long Range Transport Scenarios and Contributionmentioning

confidence: 99%

Variability of air pollutants, and PM composition and sources at a regional background site in the Balearic Islands: Review of western Mediterranean phenomenology from a 3-year study

Cerro

Cerdà

Querol

et al. 2020

Science of The Total Environment

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Characteristics of intercontinental transport of tropospheric ozone from Africa to Asia

Cited by 2 publications

References 19 publications

Spatiotemporal variations of ozone exposure and its risks to vegetation and human health in Cyprus: an analysis across a gradient of altitudes

Spatiotemporal variations of ozone exposure and its risks to vegetation and human health in Cyprus: an analysis across a gradient of altitudes

Variability of air pollutants, and PM composition and sources at a regional background site in the Balearic Islands: Review of western Mediterranean phenomenology from a 3-year study

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