Summer NAO

EOF1 of July–August SLP anomalies 25–70°N, 70°W–50°E (monthly training, daily projection). Positive = high over NW Europe / low over Greenland (warm, dry UK summers). Folland et al. trained on daily Jul–Aug data; here monthly. — Folland et al. 2009, J. Climate 22, 1082–1103, doi:10.1175/2008JCLI2459.1