Fine particulate matter (PM) has been a key domain of investigation in atmospheric research due to its complex chemical composition, transport potential, and ability to penetrate environmental and biological systems, thereby influencing ecosystem stability and human health. Varying size fractions within fine particles are of particular concern as their physicochemical properties, sources, and atmospheric transformation processes vary considerably with particle size and meteorological conditions. Seasonal variability further modulates their composition through changes in emission patterns, boundary layer dynamics, and secondary formation pathways. In this study, we investigate elemental concentrations in the fine aerosol sub-fraction (1.15-0.35 μm) sampled at a Central European rural background site across summer and winter, followed by source apportionment analysis.