We are excited to announce that on June 25 at 13:00-14:30 UTC, the Integrated Carbon Observation System - Ocean Thematic Centre (ICOS OTC) together with the IOCCP will hold a public webinar to kick off the 1st ICOS OTC pCO2 instrument inter-comparison whichwill take place at the Flanders Marine Institute (VLIZ) in Oostende, Belgium, on 28 June - 11 July 2021.

The webinar will introduce the structure and goals of the exercise but also provide a historical overview and legacy of past pCO2 inter-comparison exercises which took place between 1995 and 2010. The webinar will be moderated by Dariia Atamanchuk (IOCCP Scientific Steering Group member, and theInter-comparison Organizing Committee member) and Artur Palacz (IOCCP Project Officer). The agenda is as follows:

Agenda and speakers: (all times in UTC)

• 13:00 Werner Kutsch (ICOS Director General) - Welcome from ICOS
  
• 13:05 Richard Sanders (ICOS OTC Director) - Introduction to ICOS-OTC and rationale for the inter-comparison
• 13:15 Arne Körtzinger (GEOMAR, Germany) - Beginnings of pCO2 inter-comparisons: summary of the at-sea inter-comparison exercise onboard R/V Meteor in 1995
• 13:30 Christopher Sabine (University of Hawaii Manoa, USA) - Summary and lessons learned from the 2003 & 2009 NIES inter-comparison experiments and the 2010 Alliance for Coastal Technology (ACT) moored CO2 demonstration project
• 13:45 Tobias Steinhoff (ICOS OTC) - Introduction to the 2021 ICOS OTC pCO2 instrument inter-comparison: overview, goals, proposed activities
• 14:00 Q&A and discussion

The webinar will be a first in the series of three webinars related to this inter-comparison. The second webinar will take place on Monday, 12 July at 13:00 UTC to provide a quick summary of the inter-comparison exercise outcomes. The third and final webinar will take place in October 2021 (tentatively) and will deliver a synthesis of the results and give an opportunity for community discussions prior to the final report publication.

To register for the webinars in June and July follow this link: https://attendee.gotowebinar.com/register/8890213832162144523

See the Inter-Comparison website for more information, and look for #pco2compare on Twitter for regular updates. For any questions, please contact the lead organizer Tobias Steinhoff directly at This email address is being protected from spambots. You need JavaScript enabled to view it.. Feel free to forward the announcement (attached as PDF) to whoever may be interested.

Regards,

the Organizing Committee of the ICOS OTC pCO2 instrument inter-comparison