Agenda

(13 November 2025) Download PDF

Rooms:
 26 Nov
Esclangon Building
 27 Nov
Plenary Amphi 25
 
 28 Nov
Plenary Tour Zamansky 24th Floor, room 2400
All Other rooms to be announced

 Please see the map of room locations.

Wednesday, 26 November 2025

DAY 1
08.15 - 9.00 Registration - Esclangon Building Hall
09.00 - 10.00 Welcome addresses by the hosts
  • L'Institut Pierre-Simon Laplace - IPSL (tbd)
  • Government of France (tbd)
  • Government of New Zealand (tbd)
Introduction and vision for the workshop (Tim Naish, WCRP Chair, Robert Vautard, WGI Co-chair)
coffee
10.30 - 12.00
Kick-off survey on High Impact Events and Tipping Point (HIETP) concepts and perceptions 
Keynotes: Overview and critical appraisal of HIETP in global scientific assessments
  • WGI (Thomas Stocker, AR5 WGI Co-chair)
  • WGII (Zelina Zaiton Ibrahim, AR6/AR7 WGII CLA)
  • IPBES (David Obura, IPBES Chair)
lunch
13.00 - 14.00
Science Input I: Overview panel on framing, concepts, and challenges
Session Facilitators: Gabriele Hegerl, Alaa Al Khourdajie (WCRP Tipping Point Assessment (TPA) leads)
14.00 - 15.00
Science Input II: Lightning talks for systems and knowledge sources
Session Facilitators: Anastasia Romanou, Narelle van der Wel (WRP TPA leads)
coffee
15.15 - 16.45 (with coffee) World Café – Research on HIETPs across Earth system components: what we know and don’t know, what’s new, what’s coming, what’s missing?
16.45 - 18.00
Uptake I: Perspectives on HIETP across regions
Season Facilitator: Anna Sörensson, WCRP JSC, Speakers: IPCC Bureau members
break
20.30 - 23.15 Social Event: Dinner cruise on the Seine

Thursday, 27 November 2025

DAY 2
09.30 - 10.30
Report back from Worldcafé, Feedback on Day 1
Brief reflections by Co-Chairs and introduction to morning BOGs
  • Xiaoye Zhang, IPCC WGI Co-chair
  • Winston Chow, IPCC WGII Co-chair
  • Joy Pereira, IPCC WGIII Co-chair
coffee
10.45 - 12.15 Breakout group phase I – Concepts and definitions
lunch
13.30 – 14.45
Overview of results from BOGI
Uptake II: Keynotes on decision making and governance in the context of HIETP
  • Adaptation (Marjolin Haasnoot, WGII AR6/7 LA)
  • Mitigation (Holly Buck, WGIII AR7 CLA)
Open exchange
coffee
15.15 – 16.30
Breakout group phase II
  1. Concepts and definitions - synthesis
  2. Evidence and Tools I
  3. Adaptation and Mitigation responses
  4. Tipping dynamics in ecosystems
  5. Open (tbd for emerging topics)
16:30 – 17.45
Breakout group phase III
  1. Concepts, definitions, and framework - guidance for AR7
  2. Evidence and Tools II&
  3. Cascading climate impacts and regional consequences
  4. Carbon cycle feedbacks 
  5. Open (tbd for emerging topics)

Friday, 28 November 2025

DAY 3
09.00 – 10.30

Stocktake plenary Key learnings, areas of consensus, and points of divergence

Presentation of draft guidance on definitions and framework
10.30 – 11.00 Science communication: Improving communication around HIETP (Sue Escott, Escott Hunt Ltd)
coffee
11.15 – 12.30
Breakout group phase IV
Remaining key issues
Drafting groups for guidance

Communication Workshops

Guided mini-workshops on communicating uncertainty and risk, dealing with disagreement, and developing narratives
lunch
13.45 – 14.15 Stocktake plenary
14:15 – 15.30
Breakout group phase V
Drafting groups for guidance, conclusions, and summary slides
coffee
16.00 – 17.30

Final plenary Presentation and discussion of draft guidance and conclusions

Summary presentation of the communications workshop

Closing of the session

Saturday, 29 November 2025

Scientific Steering Committee meeting to finalize input to the IPCC First Lead Author Meeting.