Modelling Chemical Speciation in Seawater to Meet 21st Century Needs (MARCHEMSPEC)

The SCOR WG 145 on ‘Modelling Chemical Speciation in Seawater to Meet 21st Century Needs (MARCHEMSPEC)’ has been approved September 2014 and has a proposed duration of 4 years with financial Sponsors being SCOR and NSF. The terms of reference are found below. A first meeting was held 12-13 April 2015 in Sibenik, Croatia. The second meeting was held on 21. February 2016 in New Orleans, USA preceding the Ocean Sciences Meeting.

Terms of Reference

  1. To document the current status, and basis in laboratory measurements, of Pitzer models of seawater and estuarine water focusing on the chemistry of ocean acidification and micronutrient trace metals (including, but not limited to, Fe, Cu, Cd, Co, Mn, and Zn). Current capabilities and limitations for oceanographic and biogeochemical calculations will be defined, and future needs established. Important gaps in knowledge, which should have high priority for new measurements, will be identified. The components to be covered will include the seawater electrolytes, the selected trace metals, and buffer solutions and key organic ligands such as those used in CLE-CSV titrations.
  2. To publish the results of the first term of reference in the refereed scientific literature, and to introduce the conclusions and recommendations to the oceanographic community at a “town hall” event or special session at an international ocean sciences meeting.
  3. To specify the functions and capability for a web-based modelling tool that will make chemical speciation calculations easily accessible for a wide range of applications in oceanography research and teaching, and thus improve understanding and spread best practice in modelling.
  4. To implement the web-based tool for chemical speciation calculations, based upon the specification developed in the third term of reference which will also be used to obtain external funding to develop the programs, documentation, and site.