Agenda Science Advisory Group on Precipitation Chemistry (SAG-PC)

1. AgendaScience Advisory Group on Precipitation Chemistry (SAG-PC) May 11-14, 2013 Chicago, Illinois, USA

2. Welcome and Introductions • SAG mandates, GAW strategic plan and general GAW discussion -- Nickovic • Identify key SAG science issues -- Nickovic • Identify key SAG management issues -- Nickovic • Review current membership – Artz • Do we have the right people? • What areas of geography or science are missing? • Succession planning • Financial considerations • Scientific considerations • Review of SAG-PC Strategic Plan – What is the best approach to fulfill our mission to improve the quality of measurements, the suite of analytes, and the geographical coverage? • Is the list still relevant? • What is a realistic timeline? • What guidance can be provided by the Secretariat? • Who will replace Nicko (retires end of June)? • Call Liisa in Geneva?

3. Review SAG-PC mandates and progress -- Artz • Lessons learned from the assessment • Who are the User Communities? • HTAP & other modeling communities? • Critical Loads – How can we improve critical load assessments? • Climate change? • Total deposition • Geographical coverage • Nutrient measurements -- total phosphorus, total nitrogen, carbon, others? • Metals • Other analytes? • How do we work more closely with the modeling community? (Note: see Dentener attachment) • Missing analytes • Sampling protocols – should they be adjusted? • Event/daily sampling • Research sites • What to do with urban measurements • Dentener HTAP request (see attached email message) • Do we add aerosol laboratories to the LIS in collaboration with the Aerosol SAG? • Updates • The future of DEBITS -- Pienaar • Africa: Lake Victoria and East Africa network development -- Pienaar • South America – Nnet and Cordoba NADP station updates -- Forti and Stein • NADP – Lehmann and Gay • EMEP – Aas • EANET – Hara and Gromov • Russia -- Gromov • Elsewhere? -- All • Discussion of a possible organization of South American and/or African meeting(s) to establish networks on those continents

4. Status of the World Data Center • Questions from Bowersox • Should stations be posted on the WDCPC, if the labs that serve them do not participate in lab intercomparison studies? • Should stations that measure only “heavy metals” but no major inorganic ions be posted on the WDCPC site? (QA-SAC no longer sponsors “heavy metal” lab intercomparison studies.) • What about sites that are listed as urban or urban-influenced, should they be posted on the WDCPC site? • Summary of website hits • Discussion with JoergKlausen concerning GAWSIS (by phone) • General discussion • Draft agreement between NADP and GAW (refer to draft MOU) • Status of the QA/SAC • Status of the Lab Intercomparison Studies -- more questions from Bowersox • Should the 3-sample set of lab intercomparison samples be changed to include a nutrient sample (TP + TKN + ?) in place of one of the inorganic samples? • Can we change the ring diagrams and language to include a new category that identifies measurements above Z=2 or below Z=-2? This category could be labeled “biased.” Could the “Unsatisfactory” category be re-labeled? How? I’ve learned that “Unsatisfactory” bugs people, since it flags ~ 1/3 of the measurements. • EMEP QA Information – How do we get it? • Participation of labs not measuring precipitation chemistry • Participation of labs who are a part of WMO but not in the LIS • Specific issues from VesnaDjuricic of the Croatia Chemical Lab • Summary of website hits • Loose ends from the Assessment publication • How do we put data on the WDCPC web site? • How do we post diagrams and manage intellectual property? • Are there any issues associated with open data publication? • Data submission from GAW-only stations (stations not part of a major network) • Table S1: Can we establish which data sets are formally linked with GAW?