It has been known for some time that the behavior of the short-term
fluctuations of the earth's atmosphere resembles that of a chaotic
non-linear dynamical system, and that the day-to-day weather cannot be
predicted beyond a few weeks. However, it has also been found that the
interactions of the atmosphere with the underlying oceans and the land
surfaces can produce fluctuations whose time scales are much longer than
the limits of deterministic prediction of weather. It is, therefore,
natural to ask whether it is possible that the seasonal and longer time
averages of climate fluctuations can be predicted with sufficient skill
to be beneficial for social and economic applications, even though the
details of the day-to-day weather cannot be predicted beyond a few
weeks. The main objective of the workshop was to address this question
by assessing the current state of knowledge on predictability of
seasonal and interannual climate variability and to investigate various
possibilities for its prediction.