Academic Career
- 1969 Academic Assistant at the Geographic Institute of RWTH Aachen
- 1972 Promotion (Dr. phil.) in Geography at the University of Freiburg/Br.
- 1976 Research Associate at the Geographic Institute of RWTH Aachen
- 1976-1977 Fellowship of the American Council of Learned Societies
- 1977-1978 Scholarship for Habilitation by DFG
- 1979 Habilitation in Geography at the RWTH Aachen
- 1986 Professor, RWTH Aachen
- 1995 Professor, Geographic Institute of the Georg-August-University of Göttingen
- 2010: Attainment of "normal retirement age"