Table 1 Selected periods for Quasi-Biennial Oscillation composites indicated by year numbers (e.g., 2005 indicates 2004 December to 2005 February)

From: QBO deepens MJO convection

 

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

  1. The years in bold are those for which satellite cloud observations are available.