Repository logo

Browsing by Author "Montilla, Elena"

Now showing 1 - 2 of 2
  • Aerosol absorption measurements at the ALOMAR subarctic station
    Publication . Montilla, Elena; Rodríguez, Edith; Mogo, Sandra; Cachorro, Victoria; Rodrigo, Rúben; de Frutos, Ángel M
    The global study of atmospheric aerosol is one of the key factors in regards to climate change and those effects. Over the last 4 years a strong research work on aerosols properties characterization have been carried out into the Atmospheric Optics Group of the University of Valladolid (GOA-UVa) in Spain. We present the results about aerosol absorption coefficient measurements with two different techniques: the “integrating sphere photometer” and the particle soot absorption photometer (PSAP, Radiance Research). This data was acquired into the summer campaign 2008, made at north of Norway, like a result of the participation in-situ of GOA in the POLARCAT project, lead by the Norwegian Institute for Air Research, and included in the Fourth International Polar Year. Both methods are filter based and provide measurements that could be combined with optical column measurements for a better characterization of local aerosol. It contributes especially to the investigation of pollution events and to establishment the effects of the population over any local aerosol climatology. Based on this research background and the affordable and reliable instrumentation described in this work, the research can continue in Colombia in close collaborations with Spanish research groups.
    2011Journal article Open access Show more
  • Atmospheric particulate matter fractions measured at Camagüey, Cuba. Preliminary results
    Publication . Barja, Boris; Antuña, Juan Carlos; Estevan, Rene; Mogo, Sandra; Montilla, Elena; Cachorro, Victoria; De Frutos, Ángel M
    Gravimetric measurements of the particulate matter fractions PM10 and PM1, conducted at Camagüey, Cuba are reported. Samples were collected with a low volume particulate impactor Dekati PM10 two times a week, between February and October 2008. Sampling was conducted both under the local background conditions and in the presence of the Saharan dust events. The mean values of particulate matter concentrations were 28.4 μg/m3 and 14.6 μg/m3 for PM10 and PM1, respectively. The maximum/minimum concentrations of particulate matter measured for PM10 and PM1 were 73.3 μg/m3 / 13.1 μg/m3 and 33.4 μg/m3 / 4.9 μg/m3, respectively. An analysis of the eight major inorganic species (Na+, K+, Ca2+, Mg2+, NH4+, Cl–, NO3– and SO4 2–) in aerosol samples using ionic chromatography was conducted. An aerosol classification was developed depending on the air masses origins, wind velocity and direction at the measured site. The air masses origins were determined using backward trajectories derived from the HYSPLIT model.
    2011Journal article Open access Show more