Exploració per autor "Sicard, Michaël"Més informacióMés informació

Ara es mostren els items 24-43 de 161

    • Backscatter error bounds for the elastic lidar two-component inversion algorithm 

      Rocadenbosch Burillo, Francisco; Frasier, S.; Kumar, Dhiraj; Lange Vega, Diego; Gregorio López, Eduard; Sicard, Michaël (Institute of Electrical and Electronics Engineers (IEEE), 2012-11)
      Article
      Accés restringit per política de l'editorial
      Total backscatter-coefficient inversion error bounds for the two-component lidar inversion algorithm (so-called Fernald's or Klett-Fernald-Sasano's method) are derived in analytical form in response to the following three ...

    • Calculation of the overlap function and associated error of an elastic lidar or a ceilometer: Cross-comparison with a cooperative overlap-corrected system 

      Sicard, Michaël; Rodríguez Gómez, Alejandro Antonio; Comerón Tejero, Adolfo; Muñoz Porcar, Constantino (Multidisciplinary Digital Publishing Institute (MDPI), 2020-11-05)
      Article
      Accés obert
      This paper establishes the relationship between the signal of a lidar system corrected for the incomplete overlap effect and the signal of another lidar system or a ceilometer for which the overlap function is unknown. ...

    • Calibration of Raman lidar water vapor mixing ratio measurements using zenithal measurements of diffuse sunlight and a radiative transfer model 

      Muñoz Porcar, Constantino; Comerón Tejero, Adolfo; Sicard, Michaël; Barragán Cuesta, Rubén; García Vizcaíno, David; Rodríguez Gómez, Alejandro Antonio; Rocadenbosch Burillo, Francisco; Granados Muñoz, María José (Institute of Electrical and Electronics Engineers (IEEE), 2018-07-20)
      Article
      Accés obert
      Among the different techniques available for measuring the atmospheric water vapor content, Raman lidars stand out as accurate instruments providing detailed profiles with high temporal and altitude resolution. Their ...

    • Characterization of aerosol hygroscopicity using Raman lidar measurements at the EARLINET station of Payerne 

      Navas Guzmán, Francisco; Martucci, Giovanni; Collaud Coen, Martine; Granados Muñoz, María José; Hervo, Maxime; Sicard, Michaël; Haefele, Alexander (European Geosciences Union (EGU), 2019-09-17)
      Article
      Accés obert
      This study focuses on the analysis of aerosol hygroscopicity using remote sensing techniques. Continuous observations of aerosol backscatter coefficient (ßaer), temperature (T) and water vapor mixing ratio (r) have been ...

    • Characterization of atmospheric aerosols for a long-range transport of biomass-burning from North America over the Iberian Peninsula 

      Alados Arboledas, Lucas; Guerrero Rascado, Juan Luis; Olmo, F.J.; Molero, Francisco; Navas Guzmán, Francisco; Costa, J. M.; Silva, A.M.; Pujadas, Manuel; Sicard, Michaël (2010)
      Comunicació de congrés
      Accés obert
      This work presents the characterization of atmospheric aerosols performed over the Iberian Peninsula in the framework of EARLINET for a special episode on 20th August 2007. The assessment of aerosol radiative impact requires ...

    • Characterization of Tajogaite volcanic plumes detected over the Iberian Peninsula from a set of satellite and ground-based remote sensing instrumentation 

      Salgueiro, Vanda; Guerrero Rascado, Juan Luis; Costa, Maria João; Román, Roberto; Cazorla, Alberto; Serrano, Antonio; Molero, Francisco; Sicard, Michaël; Cordoba Jabonero, Carmen; Bortoli, D.; Comerón Tejero, Adolfo; Couto, Flavio Tiago; López Cayuela, María Ángeles; Pérez Ramírez, Daniel; Potes, Miguel; Muñiz Rosado, Jorge Andrés; Obregón, M.A.; Barragán, Rubén; Abril Gago, Jesús; González Catón, Ramiro; Gil Díaz, Cristina; Foyo Moreno, I.; Muñoz Porcar, Constantino; Granados Muñoz, María José; Rodríguez Gómez, Alejandro Antonio; Herreras Giralda, A.; Bravo Aranda, Juan Antonio; Carvajal Pérez, Clara Violeta; Barreto Velasco, África; Alados Arboledas, Lucas (2023-06-13)
      Article
      Accés obert
      Three volcanic plumes were detected during the Tajogaite volcano eruptive activity (Canary Islands, Spain, September–December 2021) over the Iberian Peninsula. The spatiotemporal evolution of these events is characterised ...

    • Climatological assessment of the vertically resolved optical and microphysical aerosol properties by lidar measurements, sun photometer, and in situ observations over 17 years at Universitat Politècnica de Catalunya (UPC) Barcelona 

      Lolli, Simone; Sicard, Michaël; Amato, Francesco; Comerón Tejero, Adolfo; Gil Díaz, Cristina; Landi, Tony C.; Muñoz Porcar, Constantino; Oliveira, Daniel Camilo Fortunato dos Santos; Dios Otín, Víctor Federico; Rocadenbosch Burillo, Francisco; Rodríguez Gómez, Alejandro Antonio; Alastuey Urós, Andrés; Querol Carceller, Xavier; Reche Andúgar, Cristina (European Geosciences Union (EGU), 2023-10-13)
      Article
      Accés obert
      Aerosols are one of the most important pollutants in the atmosphere and have been monitored for the past few decades by remote sensing and in situ observation platforms to assess the effectiveness of government-managed ...

    • Climatology of the aerosol extinction-to-backscatter ratio from sun-photometric measurements 

      Baldasano Recio, José María; Pedrós, Roberto; Estallés, Víctor; Sicard, Michaël; Gómez Amo, Jose Luis; Utrillas, Maria Pilar; Martínez Lozano, José Antonio; Rocadenbosch Burillo, Francisco; Pérez, C. (IEEE Press. Institute of Electrical and Electronics Engineers, 2010-01-01)
      Article
      Accés obert
      The elastic lidar equation contains two unknown atmospheric parameters, namely, the particulate optical extinction and backscatter coefficients, which are related through the lidar ratio (i.e., the particulate-extinct ...

    • Combined sun-photometer–lidar inversion: lessons learned during the EARLINET/ACTRIS COVID-19 campaign 

      Tsekeri, Alexandra; Gialitaki, Anna; Di Paolantonio, Marco; Dionisi, Davide; Pérez Ramirez, D; Liberti, Gian Luigi; Fernandes, Alnilam; Szkop, Artur; Pietruczuk, Aleksander; Pérez Ramírez, Daniel; Granados Muñoz, María José; Guerrero Rascado, Juan Luis; Alados Arboledas, Lucas; Bermejo Pantaleón, Diego; Bravo Aranda, Juan Antonio; Kampouri, Anna; Marinou, Eleni; Amiridis, Vassilis; Sicard, Michaël; Comerón Tejero, Adolfo; Muñoz Porcar, Constantino; Rodríguez Gómez, Alejandro Antonio (European Geosciences Union (EGU), 2023-12-15)
      Article
      Accés obert
      The European Aerosol Research Lidar Network (EARLINET), part of the Aerosols, Clouds and Trace gases Research Infrastructure (ACTRIS), organized an intensive observational campaign in May 2020, with the objective of ...

    • Comparison between the Kalman and the non-linear least-squares estimators in low signal-to-noise ratio lidar inversion 

      Rocadenbosch Burillo, Francisco; Sicard, Michaël; Comerón Tejero, Adolfo; Md. Reba, Mohd Nadzri (2008)
      Text en actes de congrés
      Accés obert
      This works departs from previously published results of the authors and focus on joint estimation and time evolution of the atmospheric backscatter profile and a range-independent lidar ratio by means of 1) adaptive extended ...

    • Concept design of a multiwavelength aerosol lidar system with mitigated diattenuation effects and depolarization-measurement capability 

      Comerón Tejero, Adolfo; Sicard, Michaël; Vidal Calvo, Eric; Barragán Cuesta, Rubén; Muñoz Porcar, Constantino; Rodríguez Gómez, Alejandro Antonio; Tiana Alsina, Jordi; Rocadenbosch Burillo, Francisco; García Vizcaíno, David (EDP Sciences, 2016)
      Comunicació de congrés
      Accés obert
      It is known that the retrieval of aerosol extinction and backscatter coefficients from lidar data acquired through so-called total-power channels – intended to measure the backscattered power irrespective of the polarization ...

    • Considerations about the determination of the depolarization calibration profile of a two-telescope lidar and its implications for volume depolarization ratio retrieval 

      Comerón Tejero, Adolfo; Rodríguez Gómez, Alejandro Antonio; Sicard, Michaël; Barragán Cuesta, Rubén; Muñoz Porcar, Constantino; Rocadenbosch Burillo, Francisco; Granados Muñoz, María José (Multidisciplinary Digital Publishing Institute (MDPI), 2018-06-04)
      Article
      Accés obert
      We propose a new method for calculating the volume depolarization ratio of light backscattered by the atmosphere and a lidar system that employs an auxiliary telescope to detect the depolarized component. It takes into ...

    • Contribución de la red de lidares EARLINET a la infraestructura europea de investigación atmosférica ACTRIS (Aerosols, Clouds, and Trace Gases Infrastructure Network). 

      Comerón Tejero, Adolfo; Sicard, Michaël; Rocadenbosch Burillo, Francisco (2012)
      Text en actes de congrés
      Accés obert

    • Contribution of EARLINET/ACTRIS to the summer 2013 special observing period of the ChArMEx project: monitoring of a Saharan dust event over the western and central Mediterranean 

      Sicard, Michaël; Barragán Cuesta, Rubén; Muñoz Porcar, Constantino; Comerón Tejero, Adolfo; Mallet, Marc; Dulac, F; Pelon, Jacques; Alados Arboledas, Lucas; Amodeo, Aldo; Boselli, Antonella; Bravo Aranda, Juan Antonio; D'Amico, Giuseppe; Granados Muñoz, María José; Leto, Giuseppe; Guerrero Rascado, Juan Luis; Madonna, Fabio; Mona, Lucia; Pappalardo, Gelsomina; Perrone, Maria-Rita; Burlizzi, Pasquale; Rocadenbosch Burillo, Francisco; Rodríguez Gómez, Alejandro Antonio; Scollo, Simona; Spinelli, N.; Titos, Gloria; Wang, Xuan; Zanmar Sanchez, Ricardo (2016-10-22)
      Article
      Accés obert
      In the framework of the Chemistry-Aerosol Mediterranean Experiment (ChArMEx; http://charmex.lsce.ipsl.fr/) initiative, a field campaign took place in the western Mediterranean Basin between 10 June and 5 July 2013 within ...

    • Coordinated lidar observations of Saharan dust over Europe in the frame of EARLINET-ASOS project during CALIPSO overpasses: A case study analysis with modeling support 

      de Tomasi, Ferdinando; Papayannis, Alexander; Amidiris, V.; Mona, L.; Mamouri, R. E.; Apituley, Arnoud; Alados Arboledas, Lucas; Balis, Dimitris; Chaikovsky, Anatoli; Wang, Xuan; Pietruczuk, Aleksander; Pérez, C.; Nicolae, D.; Müller, D.; Molero, Francisco; Mitev, V.; Mattis, I.; Linné, Holger; Gustafsson, O.; Grigorov, Ivan V.; Putaud, J. P.; Pappalardo, Gelsomina; Trickl, Thomas; D'Amico, Giuseppe; Simeonov, Valentin; Stebel, K.; Schnell, Franziska; Sicard, Michaël; Ravetta, F.; Rizi, V. (2009)
      Text en actes de congrés
      Accés obert
      Coordinated lidar observations of Saharan dust over Europe are performed in the frame of the EARLINETASOS (2006-2011) project, which comprises 25 stations: 16 Raman lidar stations, including 8 multiwavelength (3+2 station) ...

    • Current research in lidar technology used for the remote sensing of atmospheric aerosols 

      Comerón Tejero, Adolfo; Muñoz Porcar, Constantino; Rocadenbosch Burillo, Francisco; Rodríguez Gómez, Alejandro Antonio; Sicard, Michaël (MDPI AG, 2017-06-20)
      Article
      Accés obert
      Lidars are active optical remote sensing instruments with unique capabilities for atmospheric sounding. A manifold of atmospheric variables can be profiled using different types of lidar: concentration of species, wind ...

    • Depolarization channel for barcelona lidar. Implementation and preliminary measurements 

      Rodríguez Gómez, Alejandro Antonio; Sicard, Michaël; Muñoz Porcar, Constantino; Barragán Cuesta, Rubén; Comerón Tejero, Adolfo; Rocadenbosch Burillo, Francisco; Vidal Calvo, Eric (EDP Sciences, 2018)
      Comunicació de congrés
      Accés obert
      A new depolarization channel has beenimplemented in the BarcelonaTech University(UPC) multi-wavelength lidar system. The opticaland mechanical designs are presented. The specialconfiguration of the total power channel is ...

    • Detection and simulation of wildfire smoke impacting a Mediterranean urban atmosphere 

      van Drooge, B.L.; Sicard, Michaël; Stohl, Andreas; Fontal, Marta; Bravo, Natalia; Muñoz, Alvaro; Lange, Diego; Fernández, Pilar; Obrador Grimalt, Joan (2016-05)
      Article
      Accés obert
      The combined use of chemical analysis of organic molecules in atmospheric aerosols (PM1) collected in situ in Barcelona and optical measurements with a light detection and ranging (LIDAR) instrument allowed the characterization ...

    • Determination of the mixing layer height from regular lidar measurements in the Barcelona area 

      Sicard, Michaël; Pérez López, Carlos; Comerón Tejero, Adolfo; Baldasano Recio, José María; Rocadenbosch Burillo, Francisco (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2003)
      Text en actes de congrés
      Accés obert
      Regular aerosol backscatter measurements using an elastic-backscatter lidar were performed between May 2000 and November 2002 in Barcelona (Spain), in the frame of EARLINET (European Aerosol Research Lidar Network). The ...

    • Diffuse sunlight based calibration of the water vapor channel in the UPC Raman lidar 

      Muñoz Porcar, Constantino; Comerón Tejero, Adolfo; Sicard, Michaël; Barragán Cuesta, Rubén; García Vizcaíno, David; Rodríguez Gómez, Alejandro Antonio; Rocadenbosch Burillo, Francisco (EDP Sciences, 2017)
      Comunicació de congrés
      Accés obert
      A method for determining the calibration factor of the water vapor channel of a Raman lidar, based on zenith measurements of diffuse sunlight and on assumptions regarding some system parameters and Raman scattering models, ...