The strongest desert dust intrusion mixed with smoke over the Iberian Peninsula registered with Sun photometry

Cachorro, Victoria E.; Toledano, Carlos; Prats, Natalia; Sorribas, M.; Mogo, S.; Berjón, A.; Torres, Benjamín; Rodrigo, Rubén; Rosa, J. de la; Baraja, Angel Máximo de Frutos

doi:10.1029/2007jd009582

Cited by 105 publications

(97 citation statements)

References 57 publications

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“…This tendency of cooling the Earth-atmosphere system due to the effect of desert dust aerosols agrees with results reported for other regions (e.g., Costa et al, 2006;Derimian et al, 2006; th and 75 th percentiles (top/bottom box limits) and data within 1.5 times the interquartile range (whiskers) are shown. Lyamani et al, 2006;Cachorro et al, 2008;GuerreroRascado et al, 2009;Huang et al, 2009;García et al, 2012;Santos et al, 2013;Valenzuela et al, 2012;Obregón et al, 2015a).…”

Section: Aerosol Radiative Forcingmentioning

confidence: 99%

Thirteen Years of Aerosol Radiative Forcing in Southwestern Iberian Peninsula

Muñoz

Costa

Silva

et al. 2017

Aerosol Air Qual. Res.

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Notable uncertainties in the aerosol impact on the Earth's radiative budget still remain, mainly at local scales. This study aims to accurately quantify the shortwave aerosol radiative forcing (ARF) and its efficiency (ARFE) at Évora (Portugal, Southwestern Europe). This is an interesting region affected by different aerosol types and sources. Towards this goal, ARF and ARFE are calculated for Évora during thirteen years (2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015), which is the longest period ever analyzed for this region. For this calculation, the most updated AERONET data have been used to simulate irradiance with the libRadtran code. Thus, 1676 daily values were analyzed, obtaining a mean ARF of -7.4 W m -2 at the Earth's surface (SURF) and -1.1 W m -2 at the top of the atmosphere (TOA), indicating a cooling of the Earth-atmosphere system. The difference in ARF between TOA and SURF indicates a mean net gain of 6.3 W m -2 for the atmosphere. While no ARF seasonal pattern is observed at the TOA, a clear seasonal cycle is detected at the SURF with the most negative values occurring in summer. On the other hand, ARFE shows mean values of -62.7 W m -2 τ -1 at the SURF and -14.3 W m -2 τ -1 at the TOA. Results show that ARFE highly depends on the aerosol single scattering albedo, showing opposite behavior at the SURF and at the TOA. The large temporal variability detected in the aerosol properties in the region of study confirms the general need for long time series of measurements to achieve an accurate estimation of the ARF and ARFE.

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Section: Aerosol Radiative Forcingmentioning

confidence: 99%

Thirteen Years of Aerosol Radiative Forcing in Southwestern Iberian Peninsula

Muñoz

Costa

Silva

et al. 2017

Aerosol Air Qual. Res.

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“…The Saharan dust aerosol properties and their spatial and temporal variability over the Iberian Peninsula during the dust events have already been studied in recent years (Alados-Arboledas et al, 2003Lyamani et al, 2005Lyamani et al, , 2006aLyamani et al, , b, 2008Elias et al, 2006;Mona et al, 2006; Perez *Manuscript Click here to view linked References Dıaz et al, 2007;Guerrero-Rascado et al, 2008Cachorro et al, 2008;Sicard et al, 2011;Perez-Ramirez et al, 2012;Valenzuela et al, 2012;Navas-Guzman et a., 2013).…”

Section: Introductionmentioning

confidence: 99%

Origin and pathways of the mineral dust transport to two Spanish EARLINET sites: Effect on the observed columnar and range-resolved dust optical properties

Mandija

Sicard

Comerón

et al. 2017

Atmospheric Research

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In this paper, is presented a method for estimation of the effect of the transport process to aerosol optical properties. Aerosol optical data retrieved by lidars and sun-photometer measurements, are applied to Saharan dust events observed simultaneously at the two EARLINET/AERONET sites of Barcelona and Granada during the periods of June-September of 2012 and 2013. For this purpose, elastic lidar profiles and sun-photometer columnar retrievals are analyzed together with satellite observations and dust forecast models. Granada presents more than twice Saharan dust outbreaks compared to Barcelona. The scenarios favoring the Saharan dust outbreaks are identified in both places. The mineral dust originating in the Sahara region and arriving at both stations is usually transport wither over the Atlas Mountains or through an Atlantic pathway. Analyses of dust events affecting both stations reveal how differences in the transport process lead to differences in the aerosol optical properties measured at each station. Mean dustrelated Ångström exponent is 1.8 times higher in Barcelona than in Granada. This difference is a result of the additional contribution of anthropogenic aerosol, mainly in the aerosol fine mode, during the transport of the mineral dust plume over the Iberian Peninsula.© <2017>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ DOI Highlights  Coincidence Saharan dust events over the Granada and Barcelona stations are studied.  Column integrated and the vertical resolved from AERONET and EARLINET are used.  Cluster analysis of Hysplit trajectories was involved in this study.  Key scenarios of Saharan dust intrusions over Iberian Peninsula are identified.  Variations of the optical properties, during the transport process are determined. *Highlights (for review)Origin and pathways of the mineral dust transport to two Spanish EARLINET sites: effect on the observed columnar and range-resolved dust optical properties

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“…Dust size distributions are bimodal with a coarse mode centred at 0.94 µm in agreement with what found in Pavese et al (2009), where a transition from no-dust to dust atmospheric burden on a daily basis has been highlighted. Volume size distributions (c) are dominated by the fine size fraction in the case of polluted/smoke episode while the coarse mode prevalence characterizes dust one (Cachorro et al, 2008;Pietruczuk and Chaikovsky, 2007). Note that the prevailing fine mode for volume size distribution on 16 July confirms the presence of some smoke aerosols in transit during the measurements, as annotated by the operator during radiometric measurements.…”

Section: Columnar Propertiesmentioning

confidence: 62%

“…Note that back trajectories reported in Fig. 2 are all calculated with their arrival time almost coincident with the first hours of DLPI sampling to take into account the deposition time of dust particles (Cachorro et al, 2008;Mukai et al, 2007). Similarly, anthropogenic loading from North-Eastern Europe air masses transport results in distributions with the accumulation mode at about 0.3 µm dominating on the coarse one at 2.4 µm as plotted in Fig.…”

Section: Aerosol Properties From Ground-level Dlpi Measurementsmentioning

confidence: 99%

“…The same kind of analysis is carried out by Mukai et al, 2006, andPace et al, 2006 over an urban area in Japan and the Mediterranean Sea respectively. As a further support to aerosol characterization, inversions can be performed from radiometric measurements to obtain both columnar volume and number size distributions (Cachorro et al, 2008;Lyamani et al, 2005;Pavese et al, 2009; Published by Copernicus Publications on behalf of the European Geosciences Union. et al., 2005).…”

Section: Introductionmentioning

confidence: 99%

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Physical and optical properties of atmospheric aerosols by in-situ and radiometric measurements

et al. 2010

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Abstract. Physical and optical properties of atmospheric aerosols collected by using a high resolution (1.5 nm) spectroradiometer (spectral range 400-800 nm), a 13-stage Dekati Low Pressure Impactor (size range 30 nm-10 µm), and an AE31 Aethalometer (7 wavelenghts from 370 nm to 950 nm), have been examined in a semi-rural site in Southwest Italy (Tito Scalo, 40 • 35 N, 15 • 41 E, 750 m a.s.l.). In particular, daily averaged values of AOD andÅngström turbidity parameters from radiometric data together with masssize distributions from impactor data and Black Carbon (BC) concentrations have been analyzed from May to October 2008. Furthermore, by inverting direct solar radiances, aerosol columnar number and volume size distributions have been obtained for the same period. The comparison of different observation methods, allowed to verify if, and in what conditions, changes in aerosol properties measured at ground are representative of columnar properties variations. Agreement between columnar and in-situ measurements has been obtained in case of anthropogenic aerosol loading, while in case of Saharan dust intrusions some discrepancies have been found when dust particles were located at high layers in the atmosphere (4-8 km) thus affecting columnar properties more than surface ones. For anthropogenic aerosols, a good correlation has been confirmed through the comparison of fine aerosol fraction contribution as measured by radiometer, impactor and aethalometer, suggesting that, in this case, the particles are more homogeneously distributed over the lower layers of atmosphere and columnar aerosol optical properties are dominated by surface measured component.

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The strongest desert dust intrusion mixed with smoke over the Iberian Peninsula registered with Sun photometry

Cited by 105 publications

References 57 publications

Thirteen Years of Aerosol Radiative Forcing in Southwestern Iberian Peninsula

Thirteen Years of Aerosol Radiative Forcing in Southwestern Iberian Peninsula

Origin and pathways of the mineral dust transport to two Spanish EARLINET sites: Effect on the observed columnar and range-resolved dust optical properties

Physical and optical properties of atmospheric aerosols by in-situ and radiometric measurements

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