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A Permanent Raman Lidar Station in the Amazon: Description, Characterization and First Results : Volume 7, Issue 1 (28/01/2014)

By Barbosa, H. M. J.

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Book Id: WPLBN0004000288
Format Type: PDF Article :
File Size: Pages 49
Reproduction Date: 2015

Title: A Permanent Raman Lidar Station in the Amazon: Description, Characterization and First Results : Volume 7, Issue 1 (28/01/2014)  
Author: Barbosa, H. M. J.
Volume: Vol. 7, Issue 1
Language: English
Subject: Science, Atmospheric, Measurement
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Barja, B., Gouveia, D. A., Pauliquevis, T., Cirino, G. G., N. Santo, R. M., J. Barbos, H. M.,...Oliveira, A. B. (2014). A Permanent Raman Lidar Station in the Amazon: Description, Characterization and First Results : Volume 7, Issue 1 (28/01/2014). Retrieved from http://www.ebooklibrary.org/


Description
Description: Instituto de Física, Universidade de São Paulo, Rua do Matão, Travessa R, 187. 05508-090, São Paulo, S.P., Brazil. A permanent UV Raman Lidar station, designed to perform continuous measurements of aerosols and water vapor and aiming to study and monitor the atmosphere on the weather to climatic time scales, became operational in 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. A comparison of the aerosol optical depth from the Lidar and a co-located AERONET sun photometer showed a root mean square error of about 0.06, small compared to the range of observed AOD values (0.1 to 0.75) and to the typical AERONET AOD uncertainty (0.02). By combining nighttime measurements of the aerosol lidar ratio (50–65 sr), backtrajectories 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 Amazônia.

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

Excerpt
Adams, D. K., Fernandes, R. M. S., Kursinski, E. R., Maia, J. M., Sapucci, L. F., Machado, L. A. T., Vitorello, I., Monico, J. F. G., Holub, K. L., Gutman, S. I., Filizola, N., and Bennett, R. A.: A dense GNSS meteorological network for observing deep convection in the Amazon, Atmos. Sci. Lett., 12, 207–212, doi:10.1002/asl.312, 2011.; Andreae, M. O., Browell, E. V., Garstang, M., Gregory, G. L., Harriss, R. C., Hill, G. F., Jacob, D. J., Pereira, M. C., Sachse, G. W., Setzer, A. W., Dias, P. L. S., Talbot, R. W., Torres, A. L., and Wofsy, S. C.: Biomass-burning emissions and associated haze layers over Amazonia, J. Geophys. Res., 93, 1509–1527, doi:10.1029/JD093iD02p01509, 1988.; Bucholtz, A.: Rayleigh-scattering calculations for the terrestrial atmosphere, Appl. Optics, 34, 2765–2773, 1995.; Andreae, M. O., Artaxo, P., Fischer, H., Freitas, S. R., Grégoire, J.-M., Hansel, A., Hoor, P., Kormann, R., Krejci, R., Lange, L., Lelieveld, J., Lindinger, W., Longo, K., Peters, W., de Reus, M., Scheeren, B., Silva Dias, M. A. F., Ström, J., van Velthoven, P. F. J., and Williams, J.: Transport of biomass burning smoke to the upper troposphere by deep convection in the equatorial region, Geophys. Res. Lett., 28, 951–954, doi:10.1029/2000GL012391, 2001.; Andreae, M. O., Rosenfeld, D., P., A., Costa, A. A., Frank, G. P., Longo, K. M., and Silva-Dias, M. A. F.: Smoking rain clouds over the Amazon, Science, 303, 1337–1342, 2004.; Ansmann, A., Wandinger, U., Riebesell, M., Weitkamp, C., and Michaelis, W.: Independent measurement of extinction and backscatter profiles in cirrus clouds by using a combined Raman elastic-backscatter lidar, Appl. Optics, 31, 7113–7131, 1992.; Artaxo, P., Rizzo, L. V., Brito, J. F., Barbosa, H. M. J., Arana, A., Sena, E. T., Cirino, G. G., Bastos, W., Martin, S. T., and Andreae, M. O.: Atmospheric aerosols in Amazonia and land use change: from natural biogenic to biomass burning conditions, Faraday Discuss., 165, 203–235, doi:10.1039/C3FD00052D, 2013.; Baars, H.: Aerosol profiling with lidar in the Amazon Basin during the wet and dry season 2008, Ph.D. thesis, IfT, Leipzig, 191 pp., 2011.; Baars, H., Ansmann, A., Althausen, D., Engelmann, R., Artaxo, P., Pauliquevis, T., and Souza, R.: Further evidence for significant smoke transport from Africa to Amazonia, Geophys. Res. Lett., 38, L20802, doi:10.1029/2011GL049200, 2011.; Baars, H., Ansmann, A., Althausen, D., Engelmann, R., Heese, B., Müller, D., Artaxo, P., Paixao, M., Pauliquevis, T., and Souza, R.: Aerosol profiling with lidar in the Amazon Basin during the wet and dry season, J. Geophys. Res., 117, D21201, doi:10.1029/2012JD018338, 2012.; Bates, D. R.: Rayleigh scattering by air, Planet. Space Sci., 32, 785–790, 1984.; Barja, B.: Tropical Cirrus Clouds Measurements at camagüey, Cuba, in: Lidar Remote Sensing in Atmospheric and Earth Sciences, Part II, edited by: Bissonnette, L., Roy, G. and Valle, G., 21st International Laser Radar Conference, 673–675, 2002.; Bevan, S. L., North, P. R. J., Grey, W. M. F., Los, S. O., and Plummer, S. E.: Impact of atmospheric aerosol from biomass burning on Amazon dry-season drought, J. Geophys. Res., 114, D09204, doi:10.1029/2008JD011112, 2009.; Bodhaine, B. A., Wood, N. B., Dutton, E. G., and Slusser, J. R.: On rayleigh optical depth calculations, J. Atmos. Ocean. Tech., 16, 1854, 2.0.CO;2>doi:10.1175/1520-0426(1999)016<1854:ORODC>2.0.CO;2, 1999.; Boucher, O., Randall, D., Artaxo, P., Bretherton, C., Fe

 

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