Atmospherics particulate matter fractions measured at Camag?ey, Cuba. Preliminary results

摘要

Gravimetric measurements of the particulate matter fractions PM10 and PM1, conducted atCamagüey, Cuba are reported. Samples were collected with a low volume particulate impactorDekati PM10 two times a week, between February and October 2008. Sampling was conductedboth under the local background conditions and in the presence of the Saharan dust events. Themean values of particulate matter concentrations were 28.4 μg/m3 and 14.6 μg/m3 for PM10 andPM1, respectively. The maximum/minimum concentrations of particulate matter measured forPM10 and PM1 were 73.3 μg/m3 / 13.1 μg/m3 and 33.4 μg/m3 / 4.9 μg/m3, respectively. Ananalysis of the eight major inorganic species (Na+, K+, Ca2+, Mg2+, NH4+, Cl–, NO3– and SO4 2–) inaerosol samples using ionic chromatography was conducted. An aerosol classification wasdeveloped 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 HYSPLITmodel.