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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
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]
Total Authors: 8
Affiliation:
[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
Total Affiliations: 6
Document type: Journal article
Source: Atmospheric Measurement Techniques; v. 7, n. 6, p. 1745-1762, 2014.
Web of Science Citations: 10
Abstract

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)

FAPESP's process: 12/16100-1 - Cloud optical properties in the Amazon derived from LIDAR and Radiometer measurements
Grantee:Henrique de Melo Jorge Barbosa
Support type: Research Grants - Visiting Researcher Grant - International
FAPESP's process: 09/15235-8 - Cloud processes of the main precipitation systems in Brazil: a contribution to cloud resolving modeling and to the GPM (Global Precipitation Measurement)
Grantee:Luiz Augusto Toledo Machado
Support type: Research Projects - Thematic Grants
FAPESP's process: 12/14437-9 - Study of physico-chemical properties of biomass burning aerosols and the radiative forcing at the SAMBBA experiment - the South American Biomass Burning Analysis
Grantee:Paulo Eduardo Artaxo Netto
Support type: Research Program on Global Climate Change - Regular Grants