This Zenodo archive contains the analysis code supporting the manuscript Marine Organic Aerosols Reflect Ecosystem Variability from Phytoplankton Functional Types to Micronekton. The study combines high-resolution aerosol mass spectrometry measurements from the Mace Head Atmospheric Research Station with HYSPLIT air-mass exposure metrics, gap-free phytoplankton functional type fields, micronekton biomass fields, and air-sea physical diagnostics to investigate biological and physical controls on primary marine organic aerosol and methanesulphonic acid aerosol variability over the North-East Atlantic. The archived notebooks reproduce the main processing and figure-generation workflows used to evaluate:(i) air-mass exposure to surface-ocean biology, including phytoplankton functional types and micronekton;(ii) air-sea physical forcing, including wind speed, sea-surface temperature, wave-state diagnostics, and related exposure metrics;(iii) bloom-regime detection and seasonal ecosystem transitions; and(iv) lagged and counterfactual analyses used to distinguish biologically meaningful aerosol coupling from spurious associations with combustion-related tracers.