Sy, A. et al. (2002): Upper Ocean Climate Ship-of-Opportunity Programme of BSH - A Status Report 
25 
NAO-Index NAO-Index 
Year 
1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 
Year 
Fig. 16: Time series of NAO index and upper layer (0 - 600 m) volume 
transports (top) and heat transports (bottom). Seasonal 
temperature signal of surface layer is removed, NAOi numbers 
are from Lowe and Koslowski (1998). 
Volume Transports [Sv]