Weather

http://en.wikipedia.org/wiki/ECMWF_re-analysis

Weather Acronyms and Definitions

ECMWF

European Center for Medium range Weather Forecasting

http://www.ecmwf.int/

ERA-40

ECMWF data re-analysis between 1957 and 2002

http://en.wikipedia.org/wiki/ECMWF_re-analysis

QBO

Quasi Biennial Oscillation

http://en.wikipedia.org/wiki/QBO