GREGORI DE ARRUDA MOREIRA

GREGORI DE ARRUDA MOREIRA

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LALINET network status
2020 - LANDULFO, EDUARDO; VEGA, ALBEHT R.; YOSHIDA, ALEXANDRE C.; BASTIDAS, ALVARO; SANTOS, AMANDA V. dos; SILVA, ANTONIETA; GOMES, ANTONIO A.; GONZALEZ, BORIS B.; MELO-LUNA, CARLOS A.; HOYOS, CARLOS D.; RAE, CRISTINA T. de S.; CAMILO, DANIEL; VIVAS, DAVID; GOUVEIA, DIEGO A.; WOLFRAM, ELIAN; COLLINI, ESTELA; LOPES, FABIO J.S.; MOREIRA, GREGORI de A.; BARBOSA, HENRIQUE de M.J.; CIMINARI, HERNAN; REINA, JOHN H.; SILVA, JONATAN J. da; CESPEDES, JONNATHAN; MARRERO, JUAN C.A.; RASCADO, JUAN L.G.; PALLOTTA, JUAN; HOELZEMANN, JUDITH; ARBOLEDAS, LUCAS A.; SALLES, M.ALEJANDRA; SILVA, MARCOS P.A. da; SAMMARA, RENATA; FORNO, RICARDO N.; PAPANDREA, SEBASTIAN
LALINET (Latin American Lidar Network) follows its goal to consolidation as a federative lidar network to provide regional coverage over Latin America in providing aerosol and greenhouse gas profiles following QA/QC protocols and promoting the development of researchers and students in atmopheric science field. We show recent results on different approaches for studying the optical properties of the atmosphere regarding aerosols at tropospheric and stratospheric level and greenhouse gas mixing ratio profiles followed by our recent support and validation efforts towards present and future satellite missions.
Exploring the twilight zone
2020 - SILVA, JONATAN da; MORAIS, FERNANDO G.; FRANCO, MARCO A.; LOPES, FABIO J.S.; ARRUDA, GREGORI de A.; YOSHIDA, ALEXANDRE C.; CORREIA, ALEXANDRE; LANDULFO, EDUARDO
This study shows a set of analysis of measurements from ground-based and satellite instruments to characterize the twilight zone (TLZ) between clouds and aerosols in São Paulo, Brazil. In the vicinity of clouds turbulence measurements showed an intense upward movement of aerosol layers, while sunphotometer results showed an increase in aerosol optical depth, and lidar measurements showed an increase in the backscatter vertical profile signal.
Comparison among the atmospheric boundary layer height estimated from three different tracers
2020 - MOREIRA, GREGORI de A.; LOPES, FABIO J. da S.; GUERRERO-RASCADO, JUAN L.; ORTIZ-AMEZCUA, PABLO; CAZORLA, ALBERTO; OLIVEIRA, AMAURI P. de; LANDULFO, EDUARDO; ALADOS-ARBOLEDAS, LUCAS
The Atmospheric Boundary Layer (ABL) is the lowermost part of the troposphere. In this work, we analysed the combination of ABL height estimated continuously by three different remote sensing systems: a ceilometer, a Doppler lidar and a passive Microwave Radiometer, during a summer campaign, which was held in Granada from June to August 2016. This study demonstrates as the combined utilization of remote sensing systems, based on different tracers, can provide detailed information about the height of ABL and their sublayers.
Studying turbulence by remote sensing systems during slope-2016 campaign
2018 - MOREIRA, GREGORI de A.; GUERRERO-RASCADO, JUAN L.; BENAVENT-OLTRA, JOSE; ORTIZ-AMEZCUA, PABLO; ROMAN, ROBERTO; LANDULFO, EDUARDO; ALADOS-ARBOLEDAS, LUCAS
The Planetary Boundary Layer (PBL) is the lowermost part of the troposphere. In this work, we analysed some high order moments and PBL height detected continuously by three remote sensing systems: an elastic lidar, a Doppler lidar and a passive Microwave Radiometer, during the SLOPE-2016 campaign, which was held in Granada from May to August 2016. This study confirms the feasibility of these systems for the characterization of the PBL, helping us to justify and understand its behaviour along the day.
Estimating the planetary boundary layer height from radiosonde and doppler lidar measurements in the city of São Paulo - Brazil
2018 - MARQUES, MARCIA T.A.; MOREIRA, GREGORI de A.; PINERO, MACIEL; OLIVEIRA, AMAURI P.; LANDULFO, EDUARDO
This study aims to compare the planetary boundary layer height (PBLH) values estimated by radiosonde data through the bulk Richardson number (BRN) method and by Doppler lidar measurements through the Carrier to Noise Ratio (CNR) method, which corresponds to the maximum of the variance of CNR profile. The measurement campaign was carried during the summer of 2015/2016 in the city of São Paulo. Despite the conceptual difference between these methods, the results show great agreement between them.
Rehearsal for assessment of atmospheric optical properties during biomass burning events and long-range transportation episodes at metropolitan area of São Paulo-Brazil (RAPEL)
2018 - LOPES, FABIO J.S.; GUERRERO-RASCADO, JUAN L.; BENAVENT-OLTRA, JOSE A.; ROMAN, ROBERTO; MOREIRA, GREGORI A.; MARQUES, MARCIA T.A.; SILVA, JONATAN J. da; ALADOS-ARBOLEDAS, LUCAS; ARTAXO, PAULO; LANDULFO, EDUARDO
During the period of August-September 2016 an intensive campaign was carried out to assess aerosol properties in São Paulo-Brazil aiming to detect long-range aerosol transport events and to characterize the instrument regarding data quality. Aerosol optical properties retrieved by the GALION - LALINET SPU lidar station and collocated AERONET sunphotometer system are presented as extinction/ backscatter vertical profiles with microphysical products retrieved with GRASP inversion algorithm.
Lalinet status - station expansion and lidar ratio systematic measurements
2018 - LANDULFO, EDUARDO; LOPES, FABIO; MOREIRA, GREGORI A.; SILVA, JONATAN da; RISTORI, PABLO; QUEL, EDUARDO; OTERO, LIDIA; PALLOTA, JUAN V.; HERRERA, MILAGROS; SALVADOR, JACOBO; BALI, JUAN L.; WOLFRAM, ELIAM; ETALA, PAULA; BARBERO, ALBANE; FORNO, RICARDO; SANCHEZ, MARIA F.; BARBOSA, HENRIQUE; GOUVEIA, DIEGO; SANTOS, AMANDA V.; HOELZEMANN, JUDITH; FERNANDEZ, JOSE H.; GUEDES, ANDERSON; SILVA, ANTONIETA; BARJA, BORIS; ZAMORANO, FELIX; LEGUE, RAUL P.; BASTIDAS, ALVARO; ZABALA, MARIBEL V.; VELEZ, JUAN; NISPERUZA, DANIEL; MONTILLA, ELENA; ARREDONDO, RENE E.; MARRERO, JUAN C.A.; VEGA, ALBERTH R.; ALADOS-ARBOLEDAS, LUCAS; GUERRERO-RASCADO, JUAN L.; SUGIMOTO, NOBUO; YOSHITAKA, JIN
LALINET is expanding regionally to guarantee spatial coverage over South and Central Americas. One of the network goals is to obtain a set of regional representative aerosol optical properties such as particle backscatter, extinction and lidar ratio. Given the North-South extension and influence of distinct airmass circulation patterns it is paramount to distinguish these optical parameters in order to gain better perfomance in radiation transfer models. A set of lidar ratio data is presented.
ALINE/LALINET network status
2016 - LANDULFO, EDUARDO; LOPES, FABIO J. da S.; MOREIRA, GREGORI de A.; MARQUES, MARCIA T.A.; OSNEIDE, MARCELO; ANTUNA, JUAN C.; ARREDONDO, RENE E.; RASCADO, JUAN L.G.; ALADOS ARBOLEDAS, LUCAS; BASTIDAS, ALVARO; NISPERUZA, DANIEL; BEDOYA, ANDRES; MUNERA, MAURICIO; ALEGRIA, DAIRO; FORNO, RICARDO N.; SANCHEZ, MARIA F.; LAZCANO, OSCAR; MONTILLA ROSERO, ELENA; SILVA, ANTONIETA; JIMENEZ, CRISTOFER; QUEL, EDUARDO; RISTORI, PABLO; OTERO, LIDIA; BARBOSA, HENRIQUE M.J.; GOUVEIA, DIEGO A.; BARJA, BORIS