Browsing by Autor "Juan Carlos Antuña"

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ALINE/LALINET Network Status
(EDP Sciences, 2016) Eduardo Landulfo; Fábio Lopes; Gregori de Arruda Moreira; Márcia Talita Amorim Marques; Marcelo Osneide; Juan Carlos Antuña; René Estevan; Juan Luís Guerrero-Rascado; Lucas Alados‐Arboledas; Álvaro Bastidas
The Latin American Lidar Network, ALINE a.k.a LALINET is a federation lidar network established in 2008 which became a member of GALION/GAW program in 2013. Currently the network consists of 9 operational stations with the perspective of two more stations to be included. The network today covers more than 18 million Km2 and spans in latitude from -52° to 21° and in longitude from -78° to -47°. It should cover a larger area in the future as planned with the inclusion of more active stations.
Fostering a Collaborative Atmospheric Chemistry Research Community in the Latin America and Caribbean Region
(American Meteorological Society, 2016) Marcos Andrade; Néstor Y. Rojas; Megan L. Melamed; O. L. Mayol‐Bracero; Michel Grutter; Laura Dawidowski; Juan Carlos Antuña; Carlos Rudamas; Laura Gallardo; R. Mamani-Paco
Abstract In 2013, the international Commission on Atmospheric Chemistry and Global Pollution (iCACGP) and the International Global Atmospheric Chemistry (IGAC) Project Americas Working Group (iCACGP/IGAC AWG) was formed to build a cohesive network and foster the next generation of atmospheric scientists with the goal of contributing to a scientific community focused on building collective knowledge for the Americas. The Latin America–Caribbean (LAC) region shares common history, culture, and socioeconomic issues but, at the same time, it is highly diverse in its physical and human geography. The LAC region is unique because approximately 80% of its population lives in urban areas, resulting in high-density hotspots of urbanization and vast unpopulated rural areas. In recent years, most countries of the region have experienced rapid growth in population and industrialization as their economies emerge. The rapid urbanization, the associated increases in mobile and industrial sources, and the growth of the agricultural activities related to biomass burning have degraded air quality in certain areas of the LAC region. Air pollution has negative implications for human health, ecosystems, and climate. In addition, air pollution and the warming caused by greenhouse gases could impact the melting of Andean glaciers, an important source of freshwater. To better understand the links between air pollution and climate, it is necessary to increase the number of atmospheric scientists and improve our observational, analytical, and modeling capacities. This requires sustained and prioritized funding as well as stronger collaboration within the LAC region.
LALINET: The First Latin American–Born Regional Atmospheric Observational Network
(American Meteorological Society, 2016) Juan Carlos Antuña; Eduardo Landulfo; René Estevan; Boris Barja; Alan Robock; Elián Wolfram; P. Ristori; B. R. Clemesha; Francesco Zaratti; Ricardo Forno
Abstract Sustained and coordinated efforts of lidar teams in Latin America at the beginning of the twenty-first century have built the Latin American Lidar Network (LALINET), the only observational network in Latin America created by the agreement and commitment of Latin American scientists. They worked with limited funding but an abundance of enthusiasm and commitment toward their joint goal. Before LALINET, there were a few pioneering lidar stations operating in Latin America, described briefly here. Biannual Latin American lidar workshops, held from 2001 to the present, supported both the development of the regional lidar community and LALINET. At those meetings, lidar researchers from Latin America met to conduct regular scientific and technical exchanges among themselves and with experts from the rest of the world. Regional and international scientific cooperation has played an important role in the development of both the individual teams and the network. The current LALINET status and activities are described, emphasizing the processes of standardization of the measurements, methodologies, calibration protocols, and retrieval algorithms. Failures and successes achieved in the buildup of LALINET are presented. In addition, the first LALINET joint measurement campaign and a set of aerosol extinction profile measurements obtained from the aerosol plume produced by the Calbuco volcano eruption on 22 April 2015 are described and discussed.
Latin American Lidar Network (LALINET) for aerosol research: Diagnosis on network instrumentation
(Elsevier BV, 2016) Juan Luís Guerrero-Rascado; Eduardo Landulfo; Juan Carlos Antuña; Henrique M. J. Barbosa; Boris Barja; Álvaro Bastidas; Andrés Esteban Bedoya-Velásquez; R. Costa; René Estevan; Ricardo Forno
Towards an instrumental harmonization in the framework of LALINET: dataset of technical specifications
(SPIE, 2014) Juan Luís Guerrero-Rascado; Eduardo Landulfo; Juan Carlos Antuña; Henrique M. J. Barbosa; Boris Barja; Álvaro Bastidas; Andrés Esteban Bedoya-Velásquez; R. Costa; René Estevan; Ricardo Forno
The Latin American Lidar Network (LALINET) is the aerosol lidar network operating over South America. LALINET is now an operative network performing a schedule of routine measurements and, currently, is composed by 9 stations distributed over South America. The main objective of LALINET is to generate a consistent and statistically relevant database to enhance the understanding of the particle distribution over the continent and its direct and indirect influence on climate. The creation of an un-biased spatiotemporal database requires a throughout review of the network on two pillars: instrumentation and data processing. Because most of the LALINET systems are not series-produced instruments and, therefore, present large differences in configuration and capabilities, attempts for network harmonization and, consequently, optimization are mandatory. In this study a review of the current instrumental status of all LALINET systems is done and analyzed in detail in order to assess the potential performance of the network and to detect networking weaknesses.