A joint international investigation in the Skagerrak area, the Skagerrak Experiment (SKAGEX) was carried out from spring 1990 to spring 1991. Four field phases (SKAGEX I-IV) were carried out, and 17 research ships from 7 countries participated with the following objectives:- to identify and quantify the various water masses entering and leaving the Skagerrak Area, and their variations over time;- to investigate the mechanisms that drive the circulation in the area, and its links with biological processes;- to investigate the pathways of contaminants through the Skagerrak.The leader of the Project was B. Dybern; the ICES Data Centre acted as the project data centre, collating most of the oceanographic data from 2896 bottle/CTD profiles. This data set is a copy from the original data at ICES, published in 2007 via the information system PANGAEA.