Many observed climate anomalies can be simulated in models with specified SSTs
¥Sahel drought: Hurrell et al 2004,  Giannini et al 2003, Hoerling,
¥US Dust Bowl: Schubert et al. 2004, Seager et al. 2005
¥Drought (US, Europe, Asia): Hoerling and Kumar 2003

¥But we can not (yet) simulate the observed SSTs.