Marine Organic Aerosol Reflects Ecosystem Variability from Phytoplankton Functional Types to Micronekton

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.