News

Capacity Building in Physical Chemistry for OceanographyNew survey highlights emerging skills gaps in the physical chemistry of natural waters Earlier this year we conducted an online survey and consultation with the ocean science community to assess what we perceive as emerging skills gaps in basic physical chemistry training and expertise in several areas of chemical…

MarChemSpec has been accepted as a project within the UN Ocean Decade, which runs from 2021 – 2030. Joining the UN Ocean Decade is part of our efforts to gain improved international visibility and encourage greater use of the modelling tools. Our Ocean Decade webpage, which is under construction, can be found at https://forum.oceandecade.org/ventures/106957. Our…

MarChemSpec at Ocean Sciences 2024, and New Release of Modelling Software MarChemSpec is the Marine Chemical Speciation Model for acid-base speciation, trace metal complexation, and saturation with respect to solid phases in natural waters containing the inorganic species present in seawater. Project leaders Simon Clegg and David Turner will be present at Ocean Sciences and,…

Chemical Speciation Modelling Software Version 1.01, and Tutorials The MarChemSpec modelling software and its capabilities are described in our June 2023 post, and also under the new menu item ‘Software’ (see above). The models were released on June 15-16 at an event following the Ocean Carbon and Biogeochemistry Summer Workshop. Our tutorials were recorded, and…

Chemical Speciation Modelling Software Now Available for Download For all potential users of the MarChemSpec models, especially attendees (both in-person and virtual) at the Tutorial and Launch event at Woods Hole on 15th and 16th June: Downloads of the standalone models for execution from a command prompt (and from Excel, for Windows only), and MATLAB…

The third of our papers on chemical speciation modelling is now at the pre-proof stage of publication. It describes our model of acid-base equilibria in natural waters containing the solutes present in standard seawater: the major ions (Na+, Mg2+, Ca2+, K+, Sr2+, Cl–, and SO42-) plus H+, OH–, HSO4–, and the components of dissolved carbonate…

Our first two papers on chemical speciation modelling have just been published. They are major outputs of this Working Group, and describe the scientific basis for tools that will be provided to oceanographers later this year. These open access papers are: • M. P. Humphreys, J. F. Waters, D. R. Turner, A. G. Dickson, and…

We have just submitted our first two modelling papers to Marine Chemistry (the abstracts are shown below). The first manuscript concerns the model of artificial seawater, which is the core of any speciation model of seawater and related natural waters. It particularly focuses on acidified artificial seawater, because measurements of these solutions are essential to…

We presented a poster at the Ocean Carbon and Biogeochemistry Summer Workshop (2021), entitled “Chemical Speciation Models Including the Propagation of Uncertainties: Application to the Marine ‘Total’ pH Scale“. This describes our project overall: our collaborators, the ‘timeline’, some key results, and future plans. Download and view the pdf below (click on the green section…

Our paper describing measurements of Tris buffer solubilities in various salt solutions, and measurements of water activities of aqueous Tris, has just been published. The citation and abstract are given further below. Working Group members Simon Clegg, Andrew Dickson, and David Turner, and Jason Waters of NIST (USA), are currently working on a manuscript describing…