SCOR Working Group 145 webpage one the SCOR website, which describes WG’s  terms of reference (http://www.scor-int.org/SCOR_WGs_WG145.htm)

GEOTRACES, the “International Study of Marine Biogeochemical Cycles of Trace Elements and their Isotopes” (http://www.geotraces.org/)

Wiki at GEOMAR for trace metal speciation in seawater (https://portal.geomar.de/web/tmsis)

The Extended AIM Aerosol Thermodynamics Model (E-AIM), which is a model to calculate gas/liquid/solid equilibrium and includes calculations of aqueous speciation and activities (http://www.aim.env.uea.ac.uk/aim/aim.php)

Visual MINTEQ, a free equilibrium speciation model (http://rymd.lwr.kth.se/english/oursoftware/vminteq/index.html)