المؤلفون: Lolli, Simone, Sicard, Michaël, Amato, Francesco, Comeron, Adolfo, Gil-Díaz, Cristina, Landi, Tony C., Munoz-Porcar, Constantino, Oliveira, Daniel, Dios Otin, Federico, Rocadenbosch, Francesc, Rodriguez-Gomez, Alejandro, Alastuey, Andrés, Querol, Xavier

مصطلحات موضوعية: Aerosols, Ensure healthy lives and promote well-being for all at all ages

الوصف: 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 reduction emission policies and assess their impact on the radiative budget of the Earth's atmosphere. In fact, aerosols can directly modulate incoming short-wave solar radiation and outgoing long-wave radiation and indirectly influence cloud formation, lifetime, and precipitation. In this study, we quantitatively evaluated long-term temporal trends and seasonal variability from a climatological point of view of the optical and microphysical properties of atmospheric particulate matter at the Universitat Politècnica de Catalunya (UPC), Barcelona, Spain, over the past 17 years, through a synergy of lidar, sun photometer, and in situ concentration measurements. Interannual temporal changes in aerosol optical and microphysical properties are evaluated through the seasonal Mann–Kendall test. Long-term trends in the optical depth of the recovered aerosol; the Ångström exponent (AE); and the concentrations of PM10, PM2.5, and PM1 reveal that emission reduction policies implemented in the past decades were effective in improving air quality, with consistent drops in PM concentrations and optical depth of aerosols. The seasonal analysis of the 17-year average vertically resolved aerosol profiles obtained from lidar observations shows that during summer the aerosol layer can be found up to an altitude of 5 km, after a sharp decay in the first kilometer. In contrast, during the other seasons, the backscatter profiles fit a pronounced exponential decay well with a well-defined scale height. Long-range transport, especially dust outbreaks from the Sahara, is likely to occur throughout the year. During winter, the dust aerosol layers are floating above the boundary layer, while during the other seasons they can penetrate the layer. The analysis also revealed that intense, short-duration pollution events during ...

العلاقة: Sí; EGU General Assembly 2023; http://hdl.handle.net/10261/353133Test

الإتاحة: http://hdl.handle.net/10261/353133Test

المؤلفون: Comerón, Adolfo, Muñoz-Porcar, Constantino, Rodríguez-Gómez, Alejandro, Sicard, Michaël, Dios, Federico, Gil-Díaz, Cristina, dos Santos Oliveira, Daniel Camilo Fortunato, Rocadenbosch, Francesc

المساهمون: Universitat Politècnica de Catalunya = Université polytechnique de Catalogne Barcelona (UPC), Laboratoire de l'Atmosphère et des Cyclones (LACy), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France, This research has been supported by the Agencia Estatal de Investigación (grant no. PID2019-103886RB-I00) as well as the H2020 Environment (grant nos. 871115 and 101008004) and the H2020 Excellent Science (grant no. 778349) programs., European Project: 871115,H2020,H2020-INFRADEV-2018-2020,ACTRIS IMP(2020), European Project: 101008004,ATMO-ACCESS, European Project: 778349,H2020,H2020-MSCA-RISE-2017,GRASP-ACE(2018)

المصدر: ISSN: 1867-1381.

مصطلحات موضوعية: Algorithm, meteorological, aerosol backscatter coefficient, overlap retrieval, atmospheric, atmospheric aerosol, Raman signal, lidar, lidar signal, aerosol optical depth, AOD, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing

الوصف: International audience ; We derive an explicit (i.e., non-iterative) formula for the retrieval of the overlap function in an aerosol lidar with both elastic and Raman N2 and/or O2 channels used for independent measurements of aerosol backscatter and extinction coefficients. The formula requires only the measured, range-corrected elastic and the corresponding Raman signals, plus an assumed lidar ratio. We assess the influence of the lidar ratio error in the overlap function retrieval and present retrieval examples.

العلاقة: info:eu-repo/grantAgreement//871115/EU/Aerosol, Clouds and Trace Gases Research Infrastructure Implementation Project/ACTRIS IMP; info:eu-repo/grantAgreement//101008004/EU/Solutions for Sustainable Access to Atmospheric Research Facilities/ATMO-ACCESS; info:eu-repo/grantAgreement//778349/EU/Development of GRASP radiative transfer code for the retrieval of aerosol microphysics vertical-profiles from space measurements and its impact in ACE mission/GRASP-ACE; hal-04458822; https://hal.science/hal-04458822Test; https://hal.science/hal-04458822/documentTest; https://hal.science/hal-04458822/file/amt-16-3015-2023.pdfTest

الإتاحة: https://doi.org/10.5194/amt-16-3015-2023Test
https://hal.science/hal-04458822Test
https://hal.science/hal-04458822/documentTest
https://hal.science/hal-04458822/file/amt-16-3015-2023.pdfTest

المؤلفون: Lolli, Simone, Sicard, Michaël, Amato, Francesco, Comeron, Adolfo, Gíl-Diaz, Cristina, Landi, Tony C., Munoz-Porcar, Constantino, Oliveira, Daniel, Dios Otin, Federico, Rocadenbosch, Francesc, Rodriguez-Gomez, Alejandro, Alastuey, Andrés, Querol, Xavier, Reche, Cristina

مصطلحات موضوعية: article, Verlagsveröffentlichung

الوصف: Aerosols are one of the most important pollutants in the atmosphere and have been monitored for the past few decades by both remote sensing and in situ observation platforms to assess the effectiveness of government-managed reduction emission policies and assess their impact on the radiative budget of the Earth's atmosphere. In fact, aerosols can directly modulate incoming short-wave solar radiation and outgoing long-wave radiation and indirectly influence cloud formation, lifetime, and precipitation. In this study, we quantitatively evaluated long-term temporal trends and seasonal variability from a climatological point of view of the optical and microphysical properties of atmospheric particulate matter at the Universitat Politècnica de Catalunya, Barcelona, Spain, over the past 17 years, through a synergy of lidar, sunphotometer, and in situ concentration measurements. Interannual temporal changes in aerosol optical and microphysical properties are evaluated through the seasonal Mann-Kendall test. Long-term trends in the optical depth of the recovered aerosol, the Ångström exponent (AE) and the concentrations of PM10, PM2.5 and PM1 reveal that emission reduction policies implemented in the last decades were effective in improving air quality, with consistent drops in PM concentrations and optical depth of aerosols. The seasonal analysis of the 17-year average vertically resolved aerosol profiles obtained from lidar observations shows that during summer the aerosol layer can be found up to an altitude of 5 km, after a sharp decay in the first km. In contrast, during the other seasons, the backscatter profiles fit a pronounced exponential decay well with a well-defined scale height. Long-range transport, especially dust outbreaks from the Sahara Desert, is likely to occur throughout the year. During winter, the dust aerosol layers are floating above the boundary layer, while during the other seasons they can penetrate the layer. This study sheds some light on meteorological processes and conditions that can ...

وصف الملف: electronic

العلاقة: https://doi.org/10.5194/egusphere-2023-893Test; https://noa.gwlb.de/receive/cop_mods_00066552Test; https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065033/egusphere-2023-893.pdfTest; https://egusphere.copernicus.org/preprints/2023/egusphere-2023-893/egusphere-2023-893.pdfTest

الإتاحة: https://doi.org/10.5194/egusphere-2023-893Test
https://noa.gwlb.de/receive/cop_mods_00066552Test
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065033/egusphere-2023-893.pdfTest
https://egusphere.copernicus.org/preprints/2023/egusphere-2023-893/egusphere-2023-893.pdfTest

المؤلفون: Araújo da Silva, Marcos Paulo, Salcedo-Bosch, Andreu, Rocadenbosch, Francesc, Peña, Alfredo

المصدر: Araújo da Silva , M P , Salcedo-Bosch , A , Rocadenbosch , F & Peña , A 2023 , ' On the Retrieval of Surface-Layer Parameters from Lidar Wind-Profile Measurements ' , Remote Sensing , vol. 15 , no. 10 , 2660 . https://doi.org/10.3390/rs15102660Test

مصطلحات موضوعية: Obukhov length, Friction velocity, Heat flux, Wind energy, Floating lidar, Doppler wind lidar

الوصف: We revisit two recent methodologies based on Monin–Obukhov Similarity Theory (MOST), the 2D method and Hybrid-Wind (HW), which are aimed at estimation of the Obukhov length, friction velocity and kinematic heat flux within the surface layer. Both methods use wind-speed profile measurements only and their comparative performance requires assessment. Synthetic and observational data are used for their quantitative assessment. We also present a procedure to generate synthetic noise-corrupted wind profiles based on estimation of the probability density functions for MOST-related variables (e.g., friction velocity) and the statistics of the noise-corrupting perturbational amplitude found during an 82-day IJmuiden observational campaign. In the observational part of the study, 2D and HW parameter retrievals from floating Doppler wind lidar measurements are compared against those from a reference mast. Overall, the 2D algorithm outperformed the HW in the estimation of all the three parameters above. For instance, when assessing the friction-velocity retrieval performance with reference to sonic anemometers, determination coefficients of P 2 2D = 0.77 and P 2 HW = 0.33 were found under unstable atmospheric stability conditions, and P 2 2D = 0.81 and P 2 HW = 0.07 under stable conditions, which suggests the 2D algorithm as a prominent method for estimating the above-mentioned surface-layer parameters.

وصف الملف: application/pdf

العلاقة: https://orbit.dtu.dk/en/publications/7a2676a4-ff78-4705-9adc-d76aac32e86cTest

الإتاحة: https://doi.org/10.3390/rs15102660Test
https://orbit.dtu.dk/en/publications/7a2676a4-ff78-4705-9adc-d76aac32e86cTest
https://backend.orbit.dtu.dk/ws/files/325892671/remotesensing_15_02660.pdfTest

المؤلفون: Comerón, Adolfo, Muñoz-Porcar, Constantino, Rodríguez-Gómez, Alejandro, Sicard, Michaël, Dios, Federico, Gil-Díaz, Cristina, Santos Oliveira, Daniel Camilo Fortunato, Rocadenbosch, Francesc

المصدر: eISSN: 1867-8548

الوصف: We derive an explicit (i.e. non-iterative) formula for the retrieval of the overlap function in an aerosol lidar with both elastic and Raman N 2 or/and O 2 channels used for independent measurements of aerosol backscatter and extinction coefficients. The formula requires only the measured, range-corrected, elastic and the corresponding Raman signals, plus an assumed lidar ratio. We assess the influence of the lidar ratio error in the overlap function retrieval and present retrieval examples.

وصف الملف: application/pdf

العلاقة: https://amt.copernicus.org/preprints/amt-2022-333Test/

الإتاحة: https://doi.org/10.5194/amt-2022-333Test
https://amt.copernicus.org/preprints/amt-2022-333Test/

المؤلفون: da Silva, Marcos Paulo Araújo, Rocadenbosch, Francesc, Farré-Guarné, Joan, Salcedo-Bosch, Andreu, González-Marco, Daniel, Peña, Alfredo

المصدر: da Silva , M P A , Rocadenbosch , F , Farré-Guarné , J , Salcedo-Bosch , A , González-Marco , D & Peña , A 2022 , ' Assessing Obukhov Length and Friction Velocity from Floating Lidar Observations: A Data Screening and Sensitivity Computation Approach ' , Remote Sensing , vol. 14 , no. 6 , 1394 . https://doi.org/10.3390/rs14061394Test

مصطلحات موضوعية: Atmospheric stability, Lidar, Monin-Obukhov similarity theory, Offshore, Wind energy

الوصف: This work presents a parametric-solver algorithm for estimating atmospheric stability and friction velocity from floating Doppler wind lidar (FDWL) observations close to the mast of IJmuiden in the North Sea. The focus of the study was two-fold: (i) to examine the sensitivity of the computational algorithm to the retrieved variables and derived stability classes (the latter through confusion-matrix theory), and (ii) to present data screening procedures for FDWLs and fixed reference instrumentation. The performance of the stability estimation algorithm was assessed with reference to wind speed and temperature observations from the mast. A fixed-to-mast Doppler wind lidar (DWL) was also available, which provides a reference for wind-speed observations free from sea-motion perturbations. When comparing FDWL-and mast-derived mean wind speeds, the obtained determination coefficient was as high as that of the fixed-to-mast DWL against the mast (ρ2 = 0.996) with a root mean square error (RMSE) of 0.25 m/s. From the 82-day measurement campaign at IJmuiden (10,833 10 min records), the parametric algorithm showed that the atmosphere was neutral (31% of the cases), stable (28%), or near-neutral stable (19%) during most of the campaign. These figures satisfactorily agree with values estimated from the mast measurements (31%, 27%, and 19%, respectively).

وصف الملف: application/pdf

العلاقة: https://orbit.dtu.dk/en/publications/ba2432cc-30f9-4a83-bc36-0c52eefa87b7Test

الإتاحة: https://doi.org/10.3390/rs14061394Test
https://orbit.dtu.dk/en/publications/ba2432cc-30f9-4a83-bc36-0c52eefa87b7Test
https://backend.orbit.dtu.dk/ws/files/273805464/remotesensing_14_01394_v2.pdfTest

المؤلفون: Salcedo-Bosch, Andreu, Rocadenbosch, Francesc, Sospedra, Joaquim

المساهمون: Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Agencia Estatal de Investigación (España), European Research Council, Generalitat de Catalunya, European Institute of Innovation and Technology, Ministerio de Economía y Competitividad (España)

مصطلحات موضوعية: Floating doppler wind lidar, Apparent turbulence, Motion compensation, Kalman filter, Auto-regressive model, Random walk, Clustering, Power spectral density

الوصف: This article belongs to the Section Atmospheric Remote Sensing. ; An enhanced filter for floating Doppler wind lidar motion correction is presented. The filter relies on an unscented Kalman filter prototype for floating-lidar motion correction without access to the internal line-of-sight measurements of the lidar. In the present work, we implement a new architecture based on two cooperative estimation filters and study the impact of different wind and initial scan phase models on the filter performance in the coastal environment of Barcelona. Two model combinations are considered: (i) a basic random walk model for both the wind turbulence and the initial scan phase and (ii) an auto-regressive model for wind turbulence along with a uniform circular motion model for the scan phase. The filter motion-correction performance using each of the above models was evaluated with reference to a fixed lidar in different wind and motion scenarios (low- and high-frequency turbulence cases) recorded during a 25-day campaign at “Pont del Petroli”, Barcelona, by clustered statistical analysis. The auto-regressive wind model and the uniform circular motion phase model permitted the filter to overcome divergence in all wind and motion scenarios. The statistical indicators comparing both instruments showed overall improvement. The mean deviation increased from 1.62% (without motion correction) to −0.07% (with motion correction), while the root-mean-square error decreased from 1.87% to 0.58%, and the determination coefficient (R2 ) improved from 0.90 to 0.96. ; This research project was part of projects PGC2018-094132-B-I00 and MDM-2016-0600 (“CommSensLab” Excellence Unit) funded by Ministerio de Ciencia e Investigación (MCIN)/ Agencia Estatal de Investigación (AEI)/ 10.13039/501100011033/ FEDER “Una manera de hacer Europa”. The work of A. Salcedo-Bosch was supported by grant 2020 FISDU 00455 funded by Generalitat de Catalunya—AGAUR. The European Commission collaborated under projects H2020 ACTRIS-IMP (GA-871115) and H2020 ...

وصف الملف: application/pdf

العلاقة: #PLACEHOLDER_PARENT_METADATA_VALUE#; info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-094132-B-I00/ES/TELEDETECCION ATMOSFERICA MEDIANTE SENSORES COOPERATIVOS LIDAR, RADAR Y PASIVOS: APLICACIONES SOBRE TIERRA Y MAR PARA LA OBSERVACION ATMOSFERICA Y ENERGIA EOLICA OFF-SHORE/; info:eu-repo/grantAgreement/MINECO//MDM-2016-0600; info:eu-repo/grantAgreement/EC/H2020/871115; info:eu-repo/grantAgreement/EC/H2020/101008004; info:eu-repo/grantAgreement/EC/FP7/912054; Remote Sensing; Publisher's version; https://doi.org/10.3390/rs14194704Test; No; Remote Sensing 14(19): 4704 (2022); http://hdl.handle.net/10261/295346Test

الإتاحة: https://doi.org/10.3390/rs14194704Test
http://hdl.handle.net/10261/295346Test

المؤلفون: COMERON, ADOLFO, BARRAGAN, RUBEN, BATET, OSCAR, FORTUNATO DOS SANTOS OLIVEIRA, DANIEL CAMILO, GARCIA-VIZCAINO, DAVID, GIL-DIAZ, CRISTINA, GRANADOS-MUNOZ, MARIA JOSE, KUMAR GARG, DHIRAJ, LANGE, DIEGO, LOPEZ, MIGUEL ANGEL, MD REBA, MOHD NADZRI, MUNOZ-PORCAR, CONSTANTINO, ROCADENBOSCH, FRANCESC, RODRIGUEZ-GOMEZ, ALEJANDRO, SICARD, MICHAEL, STIANA-ALSINA, JORDI, TOMAS, SERGIO, ZENTENO-HERNANDEZ, JOSE ALEX, Universitat Politècnica De Catalunya, Institut D'Estudis Espacials De Catalunya, MATTIS, INA, NIKOLAOS, SIOMOS, ACTRIS ARES Data Centre, MONA, LUCIA, D'AMICO, GIUSEPPE, CIAMPRONE, SERGIO, RIPEPI, ERMANN, AMATO, FRANCESCO, DEMA, CLAUDIO, GUMA-CLARAMUNT, PILAR

مصطلحات موضوعية: FOS Earth and related environmental sciences

الوصف: This dataset provides climatological aggregation of aerosol remote sensing data over 20 years (2000-2019) in Barcelona, Spain. Level 3 climatological datasets are obtained as aggregated products from the ACTRIS/EARLINET fully quality controlled (QC) aerosol optical products (i.e. Level 2 products). In particular, this release considers only data fully compliant to the QC procedure v3.0 [EARLINET Data Quality Check]. Three types of data are provided: profile values, integrated quantities, layer statistics. For each type of data, four different temporal aggregations are provided: seasonal, annual, normal seasonal, normal monthly. ...

الإتاحة: https://doi.org/10.57837/cnr-imaa/ares/actris-earlinet/level3/climatological/2000_2019/brcTest
https://earlinet.org/index.php?id=322Test

المؤلفون: Chaikovsky, Anatoli, Bril, Andrey, Dubovik, Oleg, Fedarenka, Anton, Goloub, Philippe, Hu, Qiaoyun, Lopatin, Anton, Lapyonok, Tatyana, Miatselskaya, Natallia, Torres, Benjamin, Fuertes, David, Peshcharankou, Vladislau, Podvin, Thierry, Popovici, Ioana, Liu, Dong, Li, Zhengqiang, Soupiona, Ourania, Mylonaki, Maria, Mona, Lucia, Giunta, Aldo, Papagiannopoulos, Nikolaos, Perrone, Maria Rita, Romano, Salvatore, Balis, Dimitris, Siomos, Nikolaos, Voudouri, Kalliopi-Artemis, Belegante, Livio, Nicolae, Doina, Ene, Dragos, Ajtai, Nicolae, Stefanie, Horatiu, Amiridis, Vassilis, Tsekeri, Alexandra, Bortoli, Daniele, Costa, Maria Joao, Mattis, Ina, Rocadenbosch, Francesc, Rodriguez-Gomez, Alejandro, Sicard, Michael, Fernandez, Alfonso J., Molero, Francisco, Althausen, Dietrich, Baars, Holger, Guerrero Rascado, Juan Luis, Ortiz-Amezcua, Pablo, Benavent Oltra, Jose Antonio, Esteban Bedoya-Velasquez, Andres, Roman, Roberto, Alados-Arboledas, Lucas, Balin, Yurii, Kokhanenko, Grigorii, Penner, Ivan, Chen, Boris, Sverdlik, Leonid, Milinevsky, Genadi, Sugimoto, Nobuo, Shimizu, Atsushi, Nishizawa, Tomoaki, Kudo, Rei, Sano, Itaru, Yasunari, Teppei J., Irie, Hitoshi, Takemura, Toshihiko, Kim, Sang-Woo, Nguyen Xuan Anh, Pham Xuan Thanh, Pietruczuk, Aleksander, Stachlewska, Iwona S., Sannino, Alessia, Wang, Xuan, Boselli, Antonela

المساهمون: Kim, Sang-Woo

الوصف: The paper presents the preliminary results of the lidar&radiometer measurement campaign (LRMC2017), estimation of statistical relations between aerosol mode concentrations retrieved from CALIOP and ground-based lidar stations and case study of fire smoke events in the Eurasian regions using combined ground-based and space lidar and radiometer observations. ; N ; 1

العلاقة: 29TH INTERNATIONAL LASER RADAR CONFERENCE (ILRC 29), Vol.237, p. 02035; https://hdl.handle.net/10371/186589Test; 000591371500051; 172933

الإتاحة: https://doi.org/10.1051/epjconf/202023702035Test
https://hdl.handle.net/10371/186589Test

المؤلفون: Lolli, Simone, Sicard, Michael, Comeron, Adolfo, Gil-Diaz, Cristina, Dos Santos Oliveira, Daniel Camilo, Landi, Tony C., Rodriguez-Gomez, Alejandro, Munoz-Porcar, Constantino, Rocadenbosch, Francesc, Dios Otin, Federico

المساهمون: Comerón, Adolfo, Kassianov, Evgueni I., Schäfer, Klaus, Picard, Richard H., Weber, Konradin

المصدر: Remote Sensing of Clouds and the Atmosphere XXVIII

الإتاحة: https://doi.org/10.1117/12.2685167Test