Atmosphere Chemistry and Climate Change Network (AC3) EPA Funded Station: Mace Head (MHD) Coordinates: 53� 19' N, 9� 54' W Measurement Height: 4m Site Type: rural background Instrumentation: Magee Scientific Aethalometer (AE33) PM range: PM10 Units: concentration in micrograms per cubic meter (�g m-3) Compounds: Black Carbon Time: UTC