8-12 Oct 2017, Toulouse, France

This year the CRESCENDO General Assembly took place at Meteo France Conference Centre in Toulouse, France. This meeting was extended with sessions in which first results and future plans of the 3 so-called LandMIPs (C4MIP, LUMIP, LS3MIP) of CMIP6 were discussed. Special thanks go to Roland Seferian, Sarah Berthet and Matthias Rocher for acting as local organisers and all their help to run a successful meeting. The main CRESCENDO meeting ran over three days (8th to 10th Oct 2018) with around 98 attendees from all CRESCENDO partners, International Advisory Board members and several International Collaborators The GA was followed on the 11th and 12th Oct by the LandMIPs meetings.  Simultaneously, also a NEMO meeting was organized in this week at Meteo France. The week agenda was as follow:

  • Monday 8 Oct: CRESCENDO main meeting.
  • Tuesday 9 Oct: CRESCENDO main meeting.
  • Wednesday 10 Oct: (i) Morning: CRESCENDO main meeting; (ii) Afternoon: Joint overview session of CRESCENDO, C4MIP, LUMIP and LS3MIP; and (iii) Evening: Public Outreach event in Toulouse downtown.
  • Thursday 11 Oct: Plenary LandMIP sessions / NEMO user group parallel meetings.
  • Friday 12 Oct: Parallel Q&A Land MIP sessions / Plenary NEMO-users session.

All presentations from the GA and full version of the meeting minutes and post-meeting survey results have now been made available on our Intranet.


Figure 1. Photos from the GA2018 in Toulouse and event announcements. Bottom left: panel of Experts at the Conference Grand Public, from left to right: Pierre Friedlingstein, Laurent Bopp, Hervé Douville, Sonia Seneviratne, Quentin Perrier and Catherine Jeandel.

As in previous years, the GA2018 consisted of a mixture of science talks and results from senior members and young researchers as well as discussions and presentations concerning workpackages progresses during the last year of CRESCENDO. Short-term plans for the different tasks across the project WPs were well defined and discussed among project members. On the last day of the main meeting, SSC and IAB meetings were also held.

During the three days of the meeting, around 24 posters by projects members and collaborators were displayed in the hall at all times. On day 1 the poster presenters had the opportunity in a 2-3 min flash presentation on plenary to introduce and highlight their poster results before the poster viewing + lunch break session. On day 2, the group split into smaller break-out groups that ran through all the morning. These were arranged before the meeting and chaired by RT/WP leads in order to maximize discussions and working plans for the next year of CRESCENDO with project members working on related tasks. On day 3, RT/WP leads reported back in plenary from the break-out sessions held on the day before, having the whole group the opportunity to hear and discuss the different WP’s near-term plans. These include:

  • Current state of offline and online simulations: WP1-3 offline runs (Oct 18) -> WP4-6 evaluation reports (April 19) -> 2nd round: improved WP1-3 offline runs (April 20) -> WP4-6 final evaluation + final model improvement reports (Oct 20).
  • The use of ESMValTool metrics, and Key LandMIP runs (Key simulations MS4-6: to be ready by April 19). Implementation of new WP related diagnostics in the ESMValTool; future ESMValTool workshops. How to get point observations in the ESMValTool.
  • Scenario data availability for ESM teams. Provision of forcing data soon with several updates regarding Scenario forcing, Nitrogen deposition including updated historical and Ozone.
  • Traceability analysis, Model components, model resolution and model complexity.
  • Workshop on using scenarioMIP simulations for climate impacts research (workshop organized by PIK on the first week of June in Paris at the back of the ISIMIP meeting).
  • Future workshops and policy guidance documents.
  • The CRESCENDOschools Network and further updates/new schools joining the network, and public online resources on the methodologies and process of building Earth system models and projections.

Also on the evening of day 3, Wednesday 10th Oct, CRESCENDO co-organised a special, highly anticipated public outreach event in Toulouse city centre with over 120 attendees. The event was co-organised with local organisations ((Météo-France, the University of Toulouse, Météo and Climat association). Besides, it was endorsed by the “Fête de la Science” (https://www.fetedelascience.fr/). This outreach event aimed to inform non-specialist citizens in Toulouse about the recently approved IPCC Special Report on 1.5°C Global Warming (released on the 8th October 2018).

The event with the titled ‘Limiter le réchauffement climatique à 1,5°C: un objectif atteignable?‘ counted with several scientists, who presented and answered questions from a non-expert audience. The panel of experts was formed by:

  • Pierre Friedlingstein (CRESCENDO member, Exeter University, UK), who explained the current climate state (level of warming and current emissions rate) and the emergent property of the climate system, that is the climate response to cumulative CO2 emissions;
  • Hervé Douville (Météo-France, France), who explained how forthcoming climate change may impact the hydrological cycle;
  • Sonia Seneviratne (CRESCENDO member, ETH, Swizterland), who detailed how the impacts can differ between a 1.5° or 2°C warming and how the rate of extremes may change;
  • Laurent Bopp (CRESCENDO member, ENS-IPSL, France) , who provided an overview of the response of the ocean to climate change and raised the attention on how the IPCC Special Report on 1.5°C Global Warming has leveled up the risk for marine ecosystem under a warming of 1.5°C and 2°C;
  • Quentin Perrier (CIRED, France), who presented the portfolio of solutions as assessed by the recent IPCC Special Report, and detailed briefly what the economic consequences of the stringent mitigation pathways are.

The short presentations by the Panel were followed by a vibrant Q&A session, chaired by Catherine Jeandel (CNRS/LEGOS, France and member of the Météo & Climat association). Most of the questions from the audience related to: (1) the feasibility of holding global warming below 1.5°C, (2) the level of confidence of the various projections and mitigation pathways [“do we explore all the solutions?”], (3) what the current knowledge gaps [e.g. negative emissions] are, (4) how this report compares to other IPCC reports, and (5) how the recent IPCC report could influence forthcoming climate negotiations.

Interestingly, the audience also asked questions to the Panel about their feelings of the current context: – “As climate scientists, you know that we need urgent and drastic actions but nothing happens, but how do you handle this situation in your personal lives?” was one of questions asked to the Panel members during the event. After the event, the feedback received was very positive. People appreciated especially the duration of the Q&A session as they had the opportunity to talk and question the experts broadly, remarking for instance the interactions with the Panel and their openness for answering any question raised.

After the GA a post-meeting survey was run using the Surveymonkey.com platform in order to gain insight into attendee’s opinions and hence improve subsequent meetings. Everybody who attended the main meeting (8-10 Oct) was invited to participate. 41 out of 98 attendees took the survey. This is a 42% of the total attendee’s number, which supposes a very similar number of responses to previous year’s (43% for GA2017). Regarding the (i) Scientific content, and (ii) length of the meeting and time for discussions, results were excellent and still showed a slight improvement in most instances compared to our previous GA (see Fig. 2 below). Uniquely a minor decreased was observed when asking about the meeting location/venue/facilities.  In this post-GA survey, attendees had also the opportunity to make any comment, criticisms and let the Project Office know any aspect of the meeting they would like to see improved/changed in future meeting. Some very useful comments that certainly will help improve future GAs.

Furthermore, this post-GA survey allowed us to compile travel information from the attendees to get an estimation of the Carbon footprint for this meeting and compare it with the previous GA.  The total number obtained of tonnes of CO2 was 0. 0.757 t/per person in the CRESCENDO GA2018, being most of the travel emissions again generated by our flights (97% of the total produced). This estimation unfortunately showed an increase of 0.253 tonnes of CO2 per person compared to the GA2017. A plausible reason for this increment is that for this meeting we have used less trains (used decreased by ~2%) and more flights (increased by ~1.5%). It is important to stress that the obtained figure is a rough estimate as the results came from only 42% of the participants at this meeting. Nevertheless, this estimate agrees with an idea discussed during the GA that having the meeting in a central European location for all (of most of) project partners will bring down our Carbon footprint.  It was then agreed that next Assembly will occur at a more central European city (e.g. Paris) in order to minimize the carbon footprint again for the GA2019.


Figure 2. Results from the GA2018 post-meeting feedback survey, including how these compare to the previous GA2017 survey results.

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