This dataset presents weekly raw data on atmospheric deposition collected in Sierra Nevada (Granada, Spain) during the period June-September of 2022. Separate samples of dry and wet atmospheric deposition were collected using a MTX ARS 1010 automatic deposition sampler located in the University Hostel, Hoya de la Mora (37°05'N, 3°23'W, 2500 m a.s.l.), in Sierra Nevada National Park, southeastern of the Iberian Peninsula. From the dry and wet deposition samples, we took aliquots for the next variables: Particulate matter (PM, mg m⁻² d⁻¹), Particulate inorganic matter (PIM, mg m⁻² d⁻¹), Particulate organic matter (POM, mg m⁻² d⁻¹), Total Nitrogen (TN, µmol m⁻² d⁻¹), Total Phosphorus (TP, µmol m⁻² d⁻¹), and total bacteria (cells m⁻² d⁻¹).

This dataset comprises the simultaneous monitoring of about 50 high mountain lakes in the Spanish’s Sierra Nevada carried out in collaboration with government agencies and local communities as part of a citizen science campaign. Standard monitoring protocols were used to collect data on various physical (temperature, pH, dissolved oxygen, water clarity), chemical (nutrients, major cations and anions, chlorophyll a, alkalinity), and biological parameters (bacteria, zooplankton) in two successive years. High mountain lakes are ideal sites to study and understand global change processes. The utilisation of these systems as sentinels of global change can be attributed to various characteristics, such as: modest catchment areas, oligotrophic waters with limited nutrients, remote accessibility, relatively good ecological health, elevated altitudes and harsh environmental conditions, or the presence of relatively uncomplicated biological communities with rapid renewal rates, among others. The involvement of the community in Sierra Nevada Long-Term Monitoring Programs serves as an invaluable complement to scientific endeavours aimed at monitoring environmental changes, as it contributes to alleviate personnel and resource shortcomings (Villar-Argaiz et al. 2022).

Measurements of lake chemistry are part of lake monitoring, which is usually carried out by monthly sampling at many regular lake sites (5 to 17 sites depending on the intensity of the measurements over the years). The integrated sample represents the whole water column of this polymictic shallow lake with a mean lake depth of 1.2m. The measurement satisfy the analytical standards of Ö-Norm in Austria.