There are many web resources relating to environmental science. To locate authoritative sites look for those created by professional organizations, academic institutions, research agencies, or government departments.
A digital repository covering the natural marine, estuarine /brackish and freshwater environments.
A free preprint repository for the ocean and marine-climate research.
A digital marine and aquatic repository that provides access to all research output from members of the ocean research and observation community and specifically their Ocean Data and Information Networks (ODINS).