Comparison of intradiurnal variation of airborne pollen in Mar del Plata (Argentina). Part I. Non-arboreal pollen

Intradiurnal variation of non-arboreal pollen (NAP) aredescribed in relation to the associated weather using the data obtainedwith a Burkard trap in Mar del Plata city, for a three year data set(1988, 1992 and 1995). The daily pattern of concentration was quitehomogeneous during the years analysed except for 1995, when it showed avariation due to the change of position of the station. Qualitativecomposition of the NAP airborne pollen was mainly represented byPoaceae, Plantago and Cyperaceae during the three years. The daily trendshowed high concentrations during daylight hours, when instability andconvective movements prevail, and low concentrations in the night, whenmeteorological conditions favour the development of a stable stratifiedlayer.