WALTER MORINOBU NAKAEMA
21 resultados
Resultados de Busca
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Resumo IPEN-doc 23282 Estimation in situ of extinction coefficient of particles using Cavity Ring-Down Spectrometer2016 - NAKEMA, WALTER M.; HAO, ZUOQIANG; LOPES, FABIO J.S.; LANDULFO, EDUARDOLidar measurements present limitation regarding to the determination of extinction coefficient on the surface (where most aerosol particles are concentrated) due to geometrical issues and overlap functions. An attempt to overcome these feature, it is purposed an approach using a Cavity Ring-Down Spectrometer (CRDS) for monitoring in situ the optical properties of aerosols in a continuous visible-range between 630 and 650 nm. The CRDS is a very sensitive and calibration-free direct absorption spectroscopic technique that provides absolute values of optical extinction by samples that scatter and absorb light. Simultaneous measurements of scattering and extinction coefficients were performed by an elastic lidar in order to compare the respective magnitude of values.Artigo IPEN-doc 22797 Estimation of turbulence production by nocturnal low-level jets in Sao Paulo (Brazil)2016 - BEU, CASSIA M.L.; MARQUES, MARCIA T.A.; NAKAEMA, WALTER M.; SAKAGAMI, YOSHIAKI; SANTOS, PEDRO A.A.; MOREIRA, A.C. de C.A.; LANDULFO, EDUARDOTwo Doppler lidars were recently used to collect data from the planetary boundary layer (PBL) in Sao Paulo city (23º32’S, 46 º38’W). The measurement campaign was carried out from December-2015 to February-2016, during the summer, which is the rainy season. Although Sao Paulo is the main city of a huge metropolitan region with more than 11 million of inhabitants and 7 millions of vehicles, according to the government agencies, the lack of PBL observational data is still a limitation for the atmospheric dispersion studies. Therefore, this work should contribute to the comprehension of PBL mechanisms and also for future atmospheric modeling studies. The data revealed that the nocturnal low-level jets (LLJs) frequently occurred along those 3 months, but its height is highly variable, from 100 m up to 650 m. It was also seen that the nocturnal LLJs can extend for several hours, right before the sunset until sunrise. This work aims to investigate the turbulence production by the nocturnal LLJs and its influence into the stable boundary layer (SBL).Artigo IPEN-doc 22520 Lidar/photometry studies at São Paulo in the 2003-2005 period, Brazil2007 - LANDULFO, EDUARDO; SAWAMURA, PATRICIA; UEHARA, SANDRO T.; NAKAEMA, WALTER M.; TORRES, ANI S.; LOPES, FABIO J.S.; MATOS, CAIO A.; JESUS, WELLINGTON C. deArtigo IPEN-doc 21762 Latin American Lidar Network (LALINET) for aerosol research: diagnosis on network instrumentation2016 - GUERRERO-RASCADO, J.L.; LANDULFO, EDUARDO; ANTUNA, JUAN C.; BARBOSA, HENRIQUE de M.J.; BARJA, BORIS; BATIDAS, ALVARO E.; BEDOYA, ANDRES E.; COSTA, RENATA F. da; ESTEVAN, RENE; FORNO, RICARDO; GOUVEIA, DIEGO A.; JIMENEZ, CRISTOFER; LARROZA, ELIANE G.; LOPES, FABIO J. da S.; MONTILLA ROSERO, ELENA; MOREIRA, GREGORI de A.; NAKAEMA, WALTER M.; NISPERUZA, DANIEL; ALEGRIA, DAIRO; MUNERA, MAURICIO; OTERO, LIDIA; PAPANDREA, SEBASTIAN; PALLOTA, JUAN V.; PAWELKO, EZEQUIEL; QUEL, EDUARDO J.; RISTORI, PABLO; RODRIGUES, PATRICIA F.; SALVADOR, JACOBO; SANCHEZ, MARIA F.; SILVA, ANTONIETAArtigo IPEN-doc 21407 Preliminary results of the atmospheric leakage dispersion modeling of the Brazilian COsub(2) pilot2015 - MOREIRA, A.; ALMEIDA, J.C.; OLIVEIRA, S.; NAKAEMA, W.; LANDULFO, E.; ROSARIO, F.; MUSSE, A.P.; BRUNO, M.; CORREA, S.Artigo IPEN-doc 20866 Fallback atmosphere models for lidar measurements withoult corresponding radio-sounding data and modelling of a local atmosphere profile from historic radio-sounding data: Example of the São Paulo lidar metropolitan station2014 - BOURAYOU, RIAD; LOPES, FABIO J. da S.; COSTA, RENATA F. da; FERRINI, PATRICIA R.; LARROZA, ELIANE G.; NAKAEMA, WALTER M.; MOREIRA, GREGORI A.; ARAUJO, FELIPE V.; POLUHA, BRUNO; LANDULFO, EDUARDOArtigo IPEN-doc 20747 Satellite assisted aerosol correlation in a sequestered COsub(2) leakage controlled site2014 - LANDULFO, EDUARDO; LOPES, FABIO J. da S.; NAKAEMA, WALTER M.; MEDEIROS, JOSE A.G. de; MOREIRA, ANDREAArtigo IPEN-doc 20459 The first brazilian field lab fully dedicated to CO2 MMV experiments: from the start-up to the initial results2014 - MOREIRA, ANDREA C. de C.A.; MUSSE, ANA P.S.; ROSARIO, FATIMA do; LAZZARIN, HELEN S.C.; CAVELHAO, GABRIEL; CHANG, HUNG K.; OLIVA, ANDRESA; LANDULFO, EDUARDO; NAKAEMA, WALTER M.; MELO, CLARISSA L.; BRESSAN, LIA W.; KETZER, JOAO M.; CONSTANT, MARCELO J.; SPANGLER, LEE H.; DOBECK, LAURA M.Artigo IPEN-doc 20458 The first brazilian field lab fully dedicated to CO2 MMV experiments: a closer look at atmospheric leakage detection2014 - MOREIRA, ANDREA C. de C.A.; LANDULFO, EDUARDO; NAKAEMA, WALTER M.; MARQUES, MARCIA T.A.; MEDEIROS, JOSE A.G.; MUSSE, ANA P.S.; ROSARIO, FATIMA do; SPANGLER, LEE H.; DOBECK, LAURA M.Artigo IPEN-doc 20425 Active remote sensing observations for cirrus clouds profiling at subtropical and polar latitudes2014 - CORDOBA-JABONERO, CARMEN; LORROZA, ELIANE G.; LANDULFO, EDUARDO; NAKAEMA, WALTER M.; CUEVAS, EMILIO; OCHOA, HECTOR; GIL-OJEDA, MANUEL
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