A tale of two cities: is air pollution improving in Paris and London?

Font, Anna; Guiseppin, Lionel; Blangiardo, Marta; Ghersi, Véronique; Fuller, Gary W.

doi:10.1016/j.envpol.2019.01.040

Cited by 67 publications

(45 citation statements)

References 26 publications

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“…53 These control strategies could be the main reasons to see a decrease of 1.5%/yr NO x emitted as NO 2 from 2010 to 2019. This is consistent with the study of Font et al 55 The [OX] B in London is strongly dependent on the mixing ratios of O 3 on the northern hemispheric ozone baseline. 7,56 We found very similar decreasing trends of [OX] B in the 2010s as shown for northern hemispheric mid-latitude baseline O 3 by Derwent et al 57 The relatively constant northern hemispheric ozone baseline during the 2000s is reported in Derwent et al 57 (Fig.…”

Section: Modellingsupporting

confidence: 93%

Investigating the background and local contribution of the oxidants in London and Bangkok

et al. 2021

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Section: Modellingsupporting

confidence: 93%

Investigating the background and local contribution of the oxidants in London and Bangkok

et al. 2021

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“…Mass concentration variability from low pollution to high pollution levels in Paris is about one order of magnitude, while the variability is of two orders of magnitude for number concentration. Most of the studies on the pollution trend in cities are based on mass concentrations [29]. It is often established that the mass-concentration of PM10 is decreasing in European cities, mainly due to changes in diesel engines and particles filters [30].…”

Section: Discussionmentioning

confidence: 99%

Vertical Profiles of Pollution Particle Concentrations in the Boundary Layer above Paris (France) from the Optical Aerosol Counter LOAC Onboard a Touristic Balloon

Renard

Michoud

Giacomoni

2020

Sensors

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Atmospheric pollution by particulate matter represents a significant health risk and needs continuous monitoring by air quality networks that provide mass concentrations for PM10 and PM2.5 (particles with diameter smaller than 10 μm and 2.5 μm, respectively). We present here a new approach to monitor the urban particles content, using six years of aerosols number concentration measurements for particles in the 0.2−50 μm size range. These measurements are performed by the Light Optical Aerosols Counter (LOAC) instrument onboard the tethered touristic balloon “Ballon de Paris Generali”, in Paris, France. Such measurements have allowed us first to detect at ground a seasonal variability in the particulate matter content, due to the origin of the particles (anthropogenic pollution, pollens), and secondly, to retrieve the mean evolution of particles concentrations with height above ground up to 150 m. Measurements were also conducted up to 300 m above ground during major pollution events. The vertical evolution of concentrations varies from one event to another, depending on the origin of the pollution and on the meteorological conditions. These measurements have shown the interest of performing particle number concentrations measurements for the air pollution monitoring in complement with regulatory mass concentrations measurement, to better evaluate the intensity of the pollution event and to better consider the effect of smallest particles, which are more dangerous for human health.

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“…Other studies have borrowed techniques used in meta-analyses of epidemiological studies to summarize not only the heterogeneity in trends but also the uncertainty in these trends. When applied to measurements from Paris and London for 2010 to 2017, this approach revealed that the policies used to control air pollution from traffic were not effective everywhere (11). For example, NO 2 concentrations from traffic were increasing alongside some of London's roads despite Europe-wide initiatives on exhaust controls and the tightening of city's low emission zone in 2012.…”

Section: The Spatial Problemmentioning

confidence: 99%