Study region and environmental datasets

This chapter describes the geography of the study region and the observational environmental data used in these analyses. The geographical and oceanographic features of the study region are described in Section 2.1, which is organized in three sub-sections: the Ob′ and Yenisei River systems, the Kara Sea region, and the Nordic Seas and adjacent seas. Section 2.2 presents an overview of the environmental data that are used in this study, organized in three sub-sections: databases and the information system, natural environmental data (e.g., hydrological, oceanographic, and geophysical), and pollution data.