IG 3 IS Cross cutting activity National scale

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IG 3 IS Cross cutting activity: National scale Examples of national GHG emission quantification

IG 3 IS Cross cutting activity: National scale Examples of national GHG emission quantification supported by atmospheric data:

Other countries may follow. . Dutch large-scale infrastructure project Ruisdael Observatory Aer oso l

Other countries may follow. . Dutch large-scale infrastructure project Ruisdael Observatory Aer oso l ₂ CO

How to proceed from here & role of IG 3 IS Support methodological development

How to proceed from here & role of IG 3 IS Support methodological development • What are the performance limiting factors • Extended performance / uncertainty assessment • Comparison of existing approaches Support new initiatives in other countries • Methodological guidelines • Benchmarking tools Connect with other scientific projects (e. g. H 2020 -VERIFY)

Joint research community efforts Option 1: CO 2 in Western Europe • Dense ICOS

Joint research community efforts Option 1: CO 2 in Western Europe • Dense ICOS measurement network • Research capacity: Several groups developing inversion systems (F, D, NL, UK, S) • On going inter-comparison effort: Euro. Com ICOS sites used in Euro. Com

Option: CO 2 in western Europe First results: CO 2 is important, but not

Option: CO 2 in western Europe First results: CO 2 is important, but not easy. . • Euro. Com analysis ongoing (project has officially finished) • Interesting starting point for benchmarking

Option: CH 4 in Western Europe FP 7 In. GOS inter-comparison (Bergamaschi et al,

Option: CH 4 in Western Europe FP 7 In. GOS inter-comparison (Bergamaschi et al, 2015) • CH 4 is an easier target than CO 2 • Are negative trends detectable with more years of data available now?

Larger scale & role of the biosphere Research community: Let’s not forget about the

Larger scale & role of the biosphere Research community: Let’s not forget about the natural C-cycle • Continued priority on large scale assessments, supporting GCP & World Atlas • Logical link between WMO-IG 3 IS and WMO-GAW

Benchmarking

Benchmarking

Connections

Connections

Survey Questionnaire to gauche interests, and willingness to participate

Survey Questionnaire to gauche interests, and willingness to participate

Survey – preliminary outcome • 23 participants responded (22 different groups) • Urban experiment:

Survey – preliminary outcome • 23 participants responded (22 different groups) • Urban experiment: 12 x Indianapolis; 10 x Paris • National experiment: 13 x W. Europe; 11 x N. America • Willing to voluntarily contribute: 17 x ‘yes’; 5 x ‘maybe’; 1 x ‘no’ • Input to good-practice guidelines: 18 x ‘yes’; 5 x ‘no’ • Input to carbon atlas: 6 x ‘yes’ • Input to SF 6 experiment: 5 x ‘yes’

Follow up meetings Next meeting in one year, follow up meetings bi-annually Next meeting:

Follow up meetings Next meeting in one year, follow up meetings bi-annually Next meeting: Follow up on collaboration initiatives TC-IG 3 IS => General advise on inter-comparisons: At least coordinators of joint activities should receive support Venue options: Jeju Korea, Sept. 2019: Back-to-back with GGMT 2019 Paris, LSCE