Impact of the North Atlantic Oscillation on European aerosol ground levels through local processes: a seasonal model-based assessment using fixed anthropogenic emissions

Jerez, Sónia; Jiménez‐Guerrero, Pedro; Montávez, Juan Pedro; Trigo, Ricardo M.

doi:10.5194/acp-13-11195-2013

Cited by 31 publications

(34 citation statements)

References 66 publications

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“…Moulin et al (1997) analysed the role of the NAO in controlling the desert-dust transport into the Atlantic and Mediterranean and suggested that the NAO likely influences the distribution of anthropogenic aerosols. Jerez et al (2013) investigated the NAO influence on European aerosol concentrations through local atmospheric processes (e.g. precipitation, wind, cloudiness) and found that positive NAO promotes higher ground-level aerosol concentrations in southern regions of the Mediterranean during winter.…”

Section: Introductionmentioning

confidence: 99%

Projection of North Atlantic Oscillation and its effect on tracer transport

2016

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Abstract. The North Atlantic Oscillation (NAO) plays an important role in the climate variability of the Northern Hemisphere, with significant consequences on long-range pollutant transport. We investigate the evolution of pollutant transport in the 21st century influenced by the NAO under a global climate change scenario. We use a free-running simulation performed by the ECHAM/MESSy Atmospheric Chemistry (EMAC) model coupled with the ocean general circulation model MPIOM, covering the period from 1950 until 2100. Similarly to other works, the model shows a future northeastward shift of the NAO centres of action and a weak positive trend of the NAO index (over 150 years). Moreover, we find that NAO trends (computed over periods shorter than 30 years) will continue to oscillate between positive and negative values in the future. To investigate the NAO effects on transport we consider carbon monoxide tracers with exponential decay and constant interannual emissions. We find that at the end of the century, the south-western Mediterranean and northern Africa will, during positive NAO phases, see higher pollutant concentrations with respect to the past, while a wider part of northern Europe will, during positive NAO phases, see lower pollutant concentrations. Such results are confirmed by the changes observed in the future for tracer concentration and vertically integrated tracer transport, differentiating the cases of "high NAO" and "low NAO" events.

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Section: Introductionmentioning

confidence: 99%

Projection of North Atlantic Oscillation and its effect on tracer transport

2016

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“…In mid-latitudes~55 • N, 20-30 • E, during the period of June-September, negative NAO phases are associated with a stronger westerly wind flow, a higher precipitations level, a higher cloudiness and a lower air temperature [4,8]. A positive NAO during summer associated with a lower precipitation level, weaker winds and a higher temperature.…”

Section: Discussionmentioning

confidence: 99%

“…Oscillations between high and low NAO phases produce large changes in the wind speed and direction over the Atlantic, the heat and moisture transport between the Atlantic and other continents [1]. Thus, NAO influences hemispheric-scale and continent-scale pollution transport [6][7][8]. The backward trajectories analysis in Lithuania indicates that the predominant origin of air masses is South-western Europe and North Atlantic region [9,10].…”

Section: Introductionmentioning

confidence: 99%

The Influence of the North Atlantic Oscillation Index on Emergency Ambulance Calls for Elevated Arterial Blood Pressure

et al. 2018

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Abstract:The North Atlantic Oscillation (NAO) is the most prominent pattern of atmospheric variability over the middle and high latitudes of the Northern Hemisphere, especially during the cold season. It is found that "weather types" are associated with human health. It is possible that variations in NAO indices (NAOI) had additional impact on human health. We investigated the association between daily emergency ambulance calls (EACs) for exacerbation of essential hypertension and the NAOI by using Poisson regression, adjusting for season, weather variables and exposure to CO, particulate matter and ozone. An increased risk of EACs was associated with NAOI < −0.5 (Rate Ratio (RR) = 1.07, p = 0.013) and NAOI > 0.5 (RR = 1.06, p = 0.004) with a lag of 2 days as compared to −0.5 ≤ NAOI ≤ 0.5. The impact of NAOI > 0.5 was stronger during November-March (RR = 1.10, lag = 0, p = 0.026). No significant associations were found between the NAOI and EACs during 8:00-13:59. An elevated risk was associated during 14:00-21:59 with NAOI < −0.5 (RR = 1.09, p = 0.003) and NAOI > 0.5 (RR = 1.09, p = 0.019) and during 22:00-7:59 with NAOI < −0.5 (RR = 1.12, lag = 1, p = 0.001). The non-linear associations were found between the NAO and EACs. The different impact of the NAO was found during the periods November-March and April-October. The impact of the NAOI was not identical for different times of the day.

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“…RH, PR and TS can impact aerosol concentrations by altering aerosol thermodynamics, wet deposition and chemical reaction rates (Dawson et al 2007;Kleeman 2008;Jacob and Winner 2009). The wind fields at 850 hPa are considered here because the transport by the lower troposphere wind is important for surface-layer aerosol concentrations in the three studied regions (Zhang et al 2010;Jerez et al 2013;Gong et al 2006).…”

Section: Methodsologymentioning

confidence: 99%

“…Considering that the North Atlantic Oscillation (NAO) is the most important circulation pattern over Europe, the NAO might have contributed to the IAVs of surface aerosol concentrations in Europe. The impact of NAO on surface aerosol concentrations in Europe has been studied by Jerez et al (2013) for years of 1970−1999.…”

Section: Key Meteorological Variables That Drive the Interannual Varimentioning

confidence: 99%

A Comparison of Meteorology-Driven Interannual Variations of Surface Aerosol Concentrations in the Eastern United States, Eastern China, and Europe

Feng

Liao

2016

SOLA

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By the GEOS-Chem simulation with fixed anthropogenic and biomass burning emissions, this study exhibits the differences in interannual variations (IAVs) of surface-layer PM 2.5 concentrations among three populated regions, the eastern United States (US), eastern China, and Europe driven by variations in meteorological parameters. In the eastern US, PM 2.5 concentrations have relatively small IAVs with no explicit seasonality, with the absolute percent departure from the mean (APDM) values of 4−16% in four seasons. The IAVs of PM 2.5 are found to be large in North China and the northwestern Europe during winter and spring. The APDM values are 24−28% in winter and 32−36% in spring in eastern China, and 32−36% in winter and 20−24% in spring in Europe. Additionally, we obtain the key meteorological parameters that drive the IAVs of PM 2.5 by the stepwise multiline regression model (SLR) containing 8 meteorological variables. The most important meteorological variables over the eastern US, eastern China, and Europe are, respectively, the westerly at 850 hPa, surface wind speed, and the planetary boundary layer height in winter, and precipitation, relative humidity, and surface temperature in summer.(Citation: Feng, J., H. Liao, and Y. Gu, 2016: A comparison of meteorology-driven interannual variations of surface aerosols in the eastern United States, eastern China, and Europe. SOLA, 12, 146−152,

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Impact of the North Atlantic Oscillation on European aerosol ground levels through local processes: a seasonal model-based assessment using fixed anthropogenic emissions

Cited by 31 publications

References 66 publications

Projection of North Atlantic Oscillation and its effect on tracer transport

Projection of North Atlantic Oscillation and its effect on tracer transport

The Influence of the North Atlantic Oscillation Index on Emergency Ambulance Calls for Elevated Arterial Blood Pressure

A Comparison of Meteorology-Driven Interannual Variations of Surface Aerosol Concentrations in the Eastern United States, Eastern China, and Europe

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