EARLINET observations of the 14–22-May long-range dust transport event during SAMUM 2006: validation of results from dust transport modelling

Müller, D.; Heinold, B.; Tesche, M.; I., Tegen,; Althausen, D.; Arboledas, Lucas Alados; Amiridis, Vassilis; Amodeo, A.; Ansmann, A.; Balis, D.; Comerón, Adolfo; D'amico, G.; Gerasopoulos, E.; Guerrero-Rascado, Juan Luís; Freudenthaler, V.; Giannakaki, E.; Heese, B.; Iarlori, M.; Knippertz, Peter; Mamouri, R. E.; Mona, Lucia; Papayannis, Alexandros; Pappalardo, Gelsomina; Perrone, R. -M; Pisani, G.; Rizi, V.; Sicard, Michaël; Spinelli, N.; Tafuro, A.; Wiegner, M.

doi:10.3402/tellusb.v61i1.16832

Cited by 20 publications

(29 citation statements)

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“…A mean value of 1.2±0.6 is obtained for the Angstrom exponent at 532/355 nm. The observed values of lidar ratio at 355 nm and 532 nm are in perfect agreement with the 3-year study on Saharan dust intrusions over Potenza (Mona et al, 2006) and with values of 55-60 sr at 532 nm observed at CNR-IMAA during a long-range dust transport event (Müller et al, 2009). Moreover, during the same long-range dust transport event, 532/355 nm Angstrom exponent values of 0.5-0.8 have been observed at CNR-IMAA (Müller et al, 2009).…”

Section: An Example Of Comparisonsupporting

confidence: 73%

“…The observed values of lidar ratio at 355 nm and 532 nm are in perfect agreement with the 3-year study on Saharan dust intrusions over Potenza (Mona et al, 2006) and with values of 55-60 sr at 532 nm observed at CNR-IMAA during a long-range dust transport event (Müller et al, 2009). Moreover, during the same long-range dust transport event, 532/355 nm Angstrom exponent values of 0.5-0.8 have been observed at CNR-IMAA (Müller et al, 2009). This is in good agreement with the hypothesis that the layer observed on 13 August 2006 is related to dust intrusion: the 2 observed values are in agreement within the errors and moreover on 13 August 2006 the Angstrom exponent increases with the altitudes with a value in the middle of the layer of about 0.9.…”

Section: An Example Of Comparisonsupporting

confidence: 73%

“…A first guess of the lidar ratio is selected in the CALIPSO retrieval algorithms according to the type and subtype of the layer being analysed and mainly on the base of AERONET climatological studies and model calculations (Cattrall et al, 2005;Liu et al, 2005;Young et al, 2008). However, it has been observed that even for the same kind of aerosol, the lidar ratio can vary widely because of the natural variability of each aerosol species and of the aerosol modification/transportation processes (Mona et al, 2006;Müller et al, 2007Müller et al, , 2009Papayannis et al, 2008). In order to increase and validate the accuracy of aerosol optical properties retrieved from the CALIPSO pure backscatter lidar, comparisons with ground-based elastic/Raman lidar and/or High Spectral Resolution Lidar (HSRL) measurements are strongly necessary, since these techniques allow the characterization of atmospheric aerosols in terms of vertical profiles of extinction and backscatter coefficients without any assumptions on the aerosol type and composition (Ansmann et al, 1990(Ansmann et al, , 1992Hair et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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One year of CNR-IMAA multi-wavelength Raman lidar measurements in coincidence with CALIPSO overpasses: Level 1 products comparison

et al. 2009

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Abstract. At CNR-IMAA, an aerosol lidar system has operated since May 2000 in the framework of EARLINET (European Aerosol Research Lidar Network), the first lidar network for tropospheric aerosol study on a continental scale. High quality multi-wavelength measurements make this system a reference point for the validation of data products provided by CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations), the first satellite-borne lidar specifically designed for aerosol and cloud study. Since 14 June 2006, dedicated measurements have been performed at CNR-IMAA in coincidence with CALIPSO overpasses. For the first time, results on 1-year comparisons between ground-based multi-wavelength Raman lidar measurements and corresponding CALIPSO lidar Level 1 profiles are presented. A methodology for the comparison is presented and discussed in detail. Night-time cases are considered to take advantage from Raman capability of the ground based lidar. Cases with the detection of cirrus clouds in CALIPSO data are separately analysed for taking into account multiple scattering effects. For cirrus cloud cases, few cases are available to draw any conclusions. For clear sky conditions, the comparison shows good performances of the CALIPSO on-board lidar: the mean relative difference between the ground-based and CALIPSO Level 1 measurements is always within its standard deviation at all altitudes, with a mean difference in the 3-8 km altitude range of (−2±12)%. At altitude ranges corresponding to the typical PBL height observed at CNR-IMAA, a mean difference of (−24±20)% is observed in Correspondence to: L. Mona (mona@imaa.cnr.it) CALIPSO data, probably due to the difference in the aerosol content at the location of PEARL and CALIPSO groundtrack location. Finally, the mean differences are on average lower at all altitude ranges for the closest overpasses (at about 40 km) respect to the 80-km overpasses.

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Section: An Example Of Comparisonsupporting

confidence: 73%

Section: An Example Of Comparisonsupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

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One year of CNR-IMAA multi-wavelength Raman lidar measurements in coincidence with CALIPSO overpasses: Level 1 products comparison

et al. 2009

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“…The passive microwave radiometer performs measurements of the sky brightness temperature with a radiometric resolution between 0.3 and 0.4 K root mean square error at 1 s integration time (Navas-Guzman et al, 2014). The radiometer uses direct detection receivers within two bands: 22Á31 and 51Á58 GHz.…”

Section: Passive Remote Sensing Instrumentationmentioning

confidence: 99%

Study of mineral dust entrainment in the planetary boundary layer by lidar depolarisation technique

Bravo-Aranda

Titos

Granados-Muñoz

et al. 2015

Tellus B: Chemical and Physical Meteorology

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A B S T R A C T Measurements on 27 June 2011 were performed over the Southern Iberian Peninsula at Granada EARLINET station, using active and passive remote sensing and airborne and surface in-situ data in order to study the entrainment processes between aerosols in the free troposphere and those in the planetary boundary layer (PBL). To this aim the temporal evolution of the lidar depolarisation, backscatter-related Angstro¨m exponent and potential temperature profiles were used in combination with the PBL contribution to the aerosol optical depth (AOD). Our results show that the mineral dust entrainment in the PBL was caused by the convective processes which 'trapped' the lofted mineral dust layer, distributing the mineral dust particles within the PBL. The temporal evolution of ground-based in-situ data evidenced the impact of this process at surface level. Finally, the amount of mineral dust in the atmospheric column available to be dispersed into the PBL was estimated by means of POLIPHON (Polarizing Lidar Photometer Networking). The dust mass concentration derived from POLIPHON was compared with the coarse-mode mass concentration retrieved with airborne in-situ measurements. Comparison shows differences below 50 mg/m 3 (30% relative difference) indicating a relative good agreement between both techniques.

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“…The data from both campaigns have already been used for extensive model evaluation (e.g. Tegen et al, 2006;Bouet et al, 2007;Todd et al, 2007Todd et al, , 2008aHaustein et al, 2009;Heinold et al, 2009;Müller et al, 2009;Otto et al, 2009Otto et al, , 2011. The first phase of SAMUM-1 took place in May/June 2006 at three sites in Morocco accompanied by overflights of two research aircraft as integral part of the campaign.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric dust modeling from meso to global scales with the online NMMB/BSC-Dust model – Part 2: Experimental campaigns in Northern Africa

et al. 2012

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Abstract.The new NMMB/BSC-Dust model is intended to provide short to medium-range weather and dust forecasts from regional to global scales. It is an online model in which the dust aerosol dynamics and physics are solved at each model time step. The companion paper (Pérez et al., 2011) develops the dust model parameterizations and provides daily to annual evaluations of the model for its global and regional configurations. Modeled aerosol optical depth (AOD) was evaluated against AERONET Sun photometers over Northern Africa, Middle East and Europe with correlations around 0.6-0.7 on average without dust data assimilation. In this paper we analyze in detail the behavior of the model using data from the Saharan Mineral dUst experiment (SAMUM-1) in 2006 and the Bodélé Dust Experiment (BoDEx) in 2005. AOD from satellites and Sun photometers, vertically resolved extinction coefficients from lidars and particle size distributions at the ground and in the troposphere are used, complemented by wind profile data and surface meteorological measurements. All simulations were performed at the regional scale for the Northern African domain at the expected operational horizontal resolution of 25 km. Model results for SAMUM-1 generally show good agreement with satellite data over the most active Saharan dust sources. The model reproduces the AOD from Sun photometers close to sources and after long-range transport, and the dust size spectra at different height levels. At this resolution, the model is not able to reproduce a large haboob that occurred during the campaign. Some deficiencies are found concerning the vertical dust distribution related to the representation of the mixing height in the atmospheric Published by Copernicus Publications on behalf of the European Geosciences Union. K. Haustein et al.: NMMB/BSC-Dust Regional test casespart of the model. For the BoDEx episode, we found the diurnal temperature cycle to be strongly dependant on the soil moisture, which is underestimated in the NCEP analysis used for model initialization. The low level jet (LLJ) and the dust AOD over the Bodélé are well reproduced. The remaining negative AOD bias (due to underestimated surface wind speeds) can be substantially reduced by decreasing the threshold friction velocity in the model.

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EARLINET observations of the 14–22-May long-range dust transport event during SAMUM 2006: validation of results from dust transport modelling

Cited by 20 publications

References 11 publications

One year of CNR-IMAA multi-wavelength Raman lidar measurements in coincidence with CALIPSO overpasses: Level 1 products comparison

One year of CNR-IMAA multi-wavelength Raman lidar measurements in coincidence with CALIPSO overpasses: Level 1 products comparison

Study of mineral dust entrainment in the planetary boundary layer by lidar depolarisation technique

Atmospheric dust modeling from meso to global scales with the online NMMB/BSC-Dust model – Part 2: Experimental campaigns in Northern Africa

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