Browsing by Autor "Barja, Boris"

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Aerosols measurements with a CIMEL CE-318 sun photometer in Camagüey, Cuba
(Revista Boliviana de Física, 2012) Estevan, René; Benouna, Yasmine; Torres, Benjamín; Antuña, Juan. C.; Barja, Boris; Hernández, Carlos E.; Toledano, Carlos; Fuertes, David; González, Ramiro; Cachorro, Victoria E.; de Frutos, Ángel M.
Aerosol Optical Depth (AOD) measurements, carried out with a sun photometer CIMEL CE-318, installed in Camagüey, Cuba, are reported. More than 700 days of measurements are analyzed, of them 400 days corresponds to level 2.0 of Aerosol Robotic Network (AERONET) dataset. These data cover from October 7, 2008 to April 22, 2010. To the level 1.5 corresponds more than 300 days from June 3, 2010 to June 17, 2011. The average value of AOD for the first period (level 2.0) is ta(500 nm) = 0.14, while for the second ta(500 nm) = 0.17, both cases with relatively high values. These AOD values confirm preliminary results about the Maritime Mixed characteristic for the Camagüey site. Several Saharan dust events are reported during the analyzed period.
Comparison of AOD measurements and forecasts of Saharan dust events at Camagüey, Cuba.
(Revista Boliviana de Física, 2012) Antuña, Juan Carlos; Cachorro, Victoria; Estevan, René; de Frutos, Ángel; Barja, Boris; Benouna, Yasmine; Torres, Benjamín; Fuertes, David; González, Ramiro; Toledano, Carlos; Kallos, George; Christos, Spyrou
The SKIRON model AOD forecasts for Saharan dust clouds arriving to Camagüey, Cuba, during July 2009 were evaluated. For such a goal AOD measurements from a surface sunphotometer were used. Additional information from MODIS was also available for the comparison. The results demonstrate the capabilities for developing an alert and tracking system for Saharan dust events across the Atlantic.
One year of Cloud Optical Depth measurements with sunphotometer in Camagüey, Cuba.
(Revista Boliviana de Física, 2012) Barja, Boris; Benouna, Yasmine; Toledano, Carlos; Antuña, Juan Carlos; Cachorro, Victoria; Hernández, Carlos; de Frutos, Ángel; Estevan, René
One year of Cloud Optical Depth (COD) measurements obtained with the radiometer (sunphotometer Cimel CE - 318) are presented. As the first step a validation method is proposed in order to confirm the cloud in the measurement. This method is based in the cloud information derived from the actinometrical observations and radar data. In the second step of the work, the statistical results from the one year of the COD measurements in Camagüey are analyzed. The results show the high quality of COD measurements at Camagüey. The analysis of the COD frequency shows one peak close to 15. Similar behavior occurs each month. The mean COD average value for the entire period is 27.2, with a standard deviation of 17.3. The mean monthly minimum and maximum value of COD occur in December and May, respectively. The diurnal cycle of the mean hourly COD values shows an increase in the afternoon hours. In the afternoon the number of cases measured decrease. The preliminary results shown in this paper constitute the first report of such measurements in the country.