Aerosol measurements at L'Aquila EARLINET station in central Italy: Impact of local sources and large scale transport resolved by LIDAR

Pitari, Giovanni; Carlo, Piero Di; Coppari, Eleonora; Luca, Natalia De; Genova, Glauco Di; Iarlori, M.; Pietropaolo, E.; Rizi, V.; Tuccella, Paolo

doi:10.1016/j.jastp.2012.11.004

Cited by 6 publications

(5 citation statements)

References 24 publications

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“…This drawback implies that some hypotheses about aerosol extinction values have to be made for this very first altitude layer above the ground to calculate the aerosol optical depth as the vertical integral of aerosol extinction. The adopted solution is to assume a linear relationship between the lowermost aerosol extinction value available from lidar measurements and the extinction calculated at the ground surface using simultaneous colocated size‐dependent mass concentration measurements and appropriate mass‐extinction conversion factors [ Pitari et al ., ].…”

Section: Instrument Descriptionmentioning

confidence: 99%

“…The most important advance of the present study is a more accurate calculation of TOA radiative changes due to transported Saharan dust with respect to previous studies, where the radiative impact of aerosol particles is normally calculated in only the solar wavelength spectrum [Gómez-Amo et al, 2011;Pitari et al, 2013]. Although this may be appropriate for fine-mode aerosols, it is shown here that this is not the case for mineral dust.…”

Section: Introductionmentioning

confidence: 99%

“…These are mainly coarse mode particles and their optical depth and associated TOA changes in the planetary infrared spectrum need to be taken into account if a meaningful estimate of the net radiative impact is desired. In particular, Pitari et al [2013] focused on the air quality impact of desert dust and forest fire smoke transport events observed in the L'Aquila site during 2007, with radiative calculations limited to the solar spectrum, whereas it is shown here that the longwave radiation impact of desert dust is comparable and even larger than the solar spectrum impact. In addition, the sensitivity of TOA solar radiation changes to the imaginary part of the aerosol refractive index is discussed in the present paper because the net effect of soil dust particles on the solar spectrum is greatly dependent on the near balance between radiation scattering and absorption in the visible wavelength range.…”

Section: Introductionmentioning

confidence: 99%

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Desert dust transported over Europe: Lidar observations and model evaluation of the radiative impact

et al. 2015

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Three years of measurements of aerosol vertical profiles (2007)(2008)(2009) made at the lidar station of L'Aquila, a site in central Italy that is part of the European Aerosol Research Lidar Network, are studied by means of well-tested radiative transfer models to analyze the radiative impact of mineral dust aerosols transported from the Sahara desert. Sixteen major episodes of desert dust transport are considered; the radiative analysis is conducted in terms of diurnal averages of the top-of-atmosphere radiative flux changes (TOARFC) with respect to a reference "clean" aerosol profile not perturbed by long-range transported desert particles. The aerosol size distribution, needed as an input parameter for the Mie scattering program to obtain single-scattering albedo, asymmetry parameter, and extinction scaling over the whole wavelength spectrum, is obtained from simultaneous surface measurements with a multichannel aerosol spectrometer. The calculated average net TOARFC is +2.3 and +3.0 W/m 2 in clear-and total-sky conditions, respectively.

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Section: Instrument Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Desert dust transported over Europe: Lidar observations and model evaluation of the radiative impact

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“…As discussed in Pitari et al [17], the local concentration of aerosols in an urban site may be greatly perturbed by large-scale transport events of desert dust and forest fire smoke. Similarly, remote sites may be impacted by planetary-scale transport of aerosols from anthropogenic sources, namely pollutants from motor vehicle emissions and other sources.…”

Section: Introductionmentioning

confidence: 99%

A Modelling Study of the Impact of On-Road Diesel Emissions on Arctic Black Carbon and Solar Radiation Transfer

2015

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Market strategies have greatly incentivized the use of diesel engines for land transportation. These engines are responsible for a large fraction of black carbon (BC) emissions in the extra-tropical Northern Hemisphere, with significant effects on both air quality and global climate. In addition to direct radiative forcing, planetary-scale transport of BC to the Arctic region may significantly impact the surface albedo of this region through wet and dry deposition on ice and snow. A sensitivity study is made with the University of L'Aquila climate-chemistry-aerosol model by eliminating on-road diesel emissions of BC (which represent approximately 50% of BC emissions from land transportation). According to the model and using emission scenarios for the year 2000, this would imply an average change in tropopause direct radiative forcing (RF) 10.5% and 16.5%, respectively), with a peak of 1.3 × 10 −3 during the Arctic springtime.

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“…Several factors, such as aerosol vertical distribution, that affect the relationship between PM ground measurements and AOT, were consid- Retalis et al, 1999;Vidot et al, 2007). Several researchers (Chudnovsky et Pitari et al, 2013). This study presents the integrated use of satellite remote sensing, sunphotometers and LIDAR for monitoring air pollution in the Cyprus area.…”

Section: Introductionmentioning

confidence: 99%

Air Pollution from Space

Hadjimitsis¹,

Mamouri²,

Nisantzi³

et al. 2013

Remote Sensing of Environment - Integrated Approaches

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Additional information is available at the end of the chapter © 2013 Hadjimitsis et al.; licensee InTech. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. ered. Data sets from three types of sites (urban, near urban and rural) were used to develop a statistical model for the estimation of PM mass concentrations using AOT measured from remote sensing techniques and meteorological parameters. Furthermore, the ground truth observations collected within AIRSPACE project were used to assess qualitative and quantitative performance of a chemical model forecast of PM concentrations throughout Cyprus. Midletton et al. (2008) reported that in Nicosia, Cyprus for every 10-μg/m 3 increase in PM 10 daily average concentrations there was a 0.9% (95%CI: 0.6%, 1.2%) increase in all-cause and 1.2% (95%CI: -0.0%, 2.4%) increase in cardiovascular admissions. A recent study regarding dust storm events in Nicosia, Cyprus, found a 2.43% (95% CI: 0.53, 4.37) increase in daily cardiovascular mortality associated with each 10-μg/m 3 increase in PM 10 concentrations on dust days in comparison with non-dust days (Neophytou et al., 2013).

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Aerosol measurements at L'Aquila EARLINET station in central Italy: Impact of local sources and large scale transport resolved by LIDAR

Cited by 6 publications

References 24 publications

Desert dust transported over Europe: Lidar observations and model evaluation of the radiative impact

Desert dust transported over Europe: Lidar observations and model evaluation of the radiative impact

A Modelling Study of the Impact of On-Road Diesel Emissions on Arctic Black Carbon and Solar Radiation Transfer

Air Pollution from Space

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