At GEOMAR the measurements of the solubility of Tris in aqueous NaCl solutions from 25 oC to 45 oC have now been completed, and the remaining set of experiments (for 0 oC to 20 oC) will begin shortly. As described in the news entry for April, the data will be used to help quantify the effects of Na+ and Cl– ions on Tris activity coefficients and to determine the values of interaction parameters in the Pitzer speciation model we are developing.
We have just uploaded a report describing the results of our surveys of chemical oceanographers to assess their needs for chemical speciation modelling tools. This report can be found on the Publications page of this website. The survey results will inform the design of the modelling programs that are one of the outputs of the Working Group. This design is being outlined, to encourage further input from the community, in the manuscript mentioned in last month’s post.