Integrated scenarios of regional development in Ceara and Piaui - Döll, Petra; Krol, Maarten; Fuhr, Dagmar; Gaiser, Thomas; Herfort, Joachim; Höynck, Sabine; Jaeger, Annekathrin; Külls, Christoph; Mendiondo, Eduardo Mario; Printz, Andreas; Voerkelius, Susanne (Global change and regional impacts : water availability and vulnerability of ecosystems and society in the semiarid northeast of Brazil, 2003)