Table 1 Selected periods for Quasi-Biennial Oscillation composites indicated by year numbers (e.g., 2005 indicates 2004 December to 2005 February)
 | Non-El Niño (La Niña + Neutral; Niño 3.4 < 0.5) |
---|---|
WQBO | 1981, 1986, 1989, 1991, 1994, 1996, 2000, 2009, 2011, 2014, 2017, 2021 |
EQBO | 1985, 1990, 1997, 1999, 2002, 2004, 2006, 2008, 2013 |
Neutral QBO | 1982, 1984, 1993, 2001, 2012, 2018 |