A permanent Raman lidar station in the Amazon: description, characterization, and first results

Autor(es)

Barbosa, H. M. J. ^[1] ; Barja, B. ^{[1, 2]} ; Pauliquevis, T. ^[3] ; Gouveia, D. A. ^[1] ; Artaxo, P. ^[1] ; Cirino, G. G. ^[4] ; Santos, R. M. N. ^[5] ; Oliveira, A. B. ^[6]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo - Brazil

^[2] Inst Meteorol Cuba, Ctr Meteorol Camaguey, Matanzas - Cuba

^[3] UNIFESP, Dept Ciencias Exatas & Terra, Diadema, SP - Brazil

^[4] Inst Nacl de Pesquisas da Amazonia, Manaus, AM - Brazil

^[5] Univ Estado Amazonas, Manaus, AM - Brazil

^[6] Inst Fed Educ Ciencia & Tecnol Sao Paulo, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Atmospheric Measurement Techniques; v. 7, n. 6, p. 1745-1762, 2014.
• Citações Web of Science: 10

Resumo

A permanent UV Raman lidar station, designed to perform continuous measurements of aerosols and water vapor and aiming to study and monitor the atmosphere from weather to climatic time scales, became operational in the central Amazon in July 2011. The automated data acquisition and internet monitoring enabled extended hours of daily measurements when compared to a manually operated instrument. This paper gives a technical description of the system, presents its experimental characterization and the algorithms used for obtaining the aerosol optical properties and identifying the cloud layers. Data from one week of measurements during the dry season of 2011 were analyzed as a mean to assess the overall system capability and performance. Both Klett and Raman inversions were successfully applied. A comparison of the aerosol optical depth from the lidar and from a co-located Aerosol Robotic Network (AERONET) sun photometer showed a correlation coefficient of 0.86. By combining nighttime measurements of the aerosol lidar ratio (50-65 sr), back-trajectory calculations and fire spots observed from satellites, we showed that observed particles originated from biomass burning. Cirrus clouds were observed in 60% of our measurements. Most of the time they were distributed into three layers between 11.5 and 13.4 km a. g. l. The systematic and long-term measurements being made by this new scientific facility have the potential to significantly improve our understanding of the climatic implications of the anthropogenic changes in aerosol concentrations over the pristine Amazonia. (AU)

• Processo FAPESP: 12/16100-1 - Propriedades ópticas de nuvens na Amazônia a partir de medidas com LIDAR e radiômetro
• Beneficiário: Henrique de Melo Jorge Barbosa
• Linha de fomento: Auxílio à Pesquisa - Pesquisador Visitante - Internacional
• Processo FAPESP: 11/50170-4 - Produção de aerossóis secundários na Amazônia e seus efeitos climáticos
• Beneficiário: Paulo Eduardo Artaxo Netto
• Linha de fomento: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular
• Processo FAPESP: 09/15235-8 - Processos de nuvens associados aos principais sistemas precipitantes no Brasil: uma contribuição à modelagem da escala de nuvens e ao GPM (Medida Global de Precipitação)
• Beneficiário: Luiz Augusto Toledo Machado
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 12/14437-9 - Estudo de propriedades físico-químicas de aerossóis de queimadas e forçante radiativa no experimento SAMBBA - the South American Biomass Burning Analysis
• Beneficiário: Paulo Eduardo Artaxo Netto
• Linha de fomento: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular