A daily Azores-Iceland North Atlantic oscillation index back to 1850

Cropper, Thomas ORCID: https://orcid.org/0000-0002-3696-7905; Hanna, Edward; Valente, Maria Antónia; Jónsson, Trausti. 2015 A daily Azores-Iceland North Atlantic oscillation index back to 1850. Geoscience Data Journal, 2 (1). 12-24. https://doi.org/10.1002/gdj3.23