SCOR Working Group 145
Modelling Chemical Speciation in Seawater to Meet 21st Century Needs (MARCHEMSPEC)

Chair: David Turner (Sweden) and Vice-Chairs: Simon Clegg (UK) and Sylvia Sander (New Zealand)

Other Full Members: Heather Benway (USA), Arthur Chen (China-Taipei), Andrew Dickson (USA), Vanessa Hatje (Brazil), Maite Maldonado (Canada), Alessandro Tagliabue (UK), and Rodrigo Torres (Chile)

Associate Members: Eric Achterberg (Germany), Yuri Artioli (UK), Parthasarathi Chakraborty (India), Peter Croot (Ireland), Martha Gledhill (Germany), Giles Marion (USA), Peter May (Australia), Frank Millero (USA), Ivanka Pizeta (Croatia), Darren Rowland (Australia), Pavel Tishchenko (Russia), Stan van den Berg (UK), Wolfgang Voigt (Germany), Christoph Völker (Germany), Feiyue Wang (Canada), and Mona Wells (China)

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.

Approved: September 2014

Financial Sponsors: SCOR, NSF


#1: 12-13 April 2015 in Sibenik, Croatia
#2: 21 February 2016 in New Orleans, Lousiana, USA

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