All posts by Mareike@WCRP/SPARC

Tomorrow: next event of the Tipping Points Discussion Series

We invite you to join us for our upcoming discussion on Tipping Points in Education and Digitalisation, taking place on 25 May 2023, 15:30 – 17:00 CEST

This webinar is part of the Tipping Points Discussion Series organized by AIMES, the Earth Commission, the WCRP Safe Landing Climates Lighthouse Activity, and partners. The series aims to advance knowledge of tipping elements, irreversibility, and abrupt changes in the Earth system – both in natural and social systems. Our two speakers are: 

  • Raya Muttarak (University of Bologna) – Exploring the role of education as a potential accelerator of sustainable society
  • Ridhi Kashyap (University of Oxford) – Digital technologies as accelerators of information diffusion

The discussion will be moderated by Anne Goujon (IIASA)

All information and the link to register are available on the FutureEarth website.

CACTI workshop: Abstract submission open

The goal of the workshop is to review the progress since the last TriMIP workshop (TriMIP-3) that brought together the active and collaborative communities of AerChemMIP, RAMIP, RFMIP, and PDRMIP. This workshop will focus on advances in our understanding since AR6, identifying gaps and informing future research directions based on the community “Composition Air quality Climate inTeractions Initiative (CACTI): Emissions to Response”.
The hybrid workshop will be held in-person at GEOMAR in Kiel from Tuesday 13 June to Thursday 15 June 2023, with an option to join online. The workshop will consist of a mix of presentations and discussions, which we aim to partly record and make available with limited access. We kindly invite you to submit abstracts on your relevant work addressing at least one of the three CACTI goals:

  1. Characterize ERFs and assess adjustments from historical and future changes in atmospheric composition and SLCFs emissions in global models
  2. Quantify the climate and air quality responses to global and regional changes in SLCF emissions
  3. Understand the Earth System feedbacks through chemistry and aerosols in response to anthropogenic climate change

Abstract submission is open until 02 May 2023 and can be done by completing this form. Details on how to register will be announced in due course. Further details, including practical information for arranging travel, can be found on the CACTI webpage.
Further announcements will be made through this CACTI mailing list. If you have not signed up yet, we encourage you to subscribe by sending an email to ed.ra1685960299moeg@1685960299nioj-1685960299itcac1685960299.
We look forward to receiving your abstracts and seeing you in June. 
On behalf of the organising committee,
R. Allen, B. Collins, S. Fiedler, P. Griffiths, M. Kasoar, V. Naik, F. O’Connor, M. Schulz, C. Smith, T. Takemura, S. Turnock, D. Watson-Parris, D. Westervelt, L. Wilcox

Deadline approaching: Abstract submission to the Hunga Tonga Impacts workshop

This Friday is the Abstract deadline (21st April) for the online “Hunga-Tonga impacts” open science workshop (Tue 16th & Wed 17th May 2023).

SPARC has established a new cross-activity focus project on the impacts from the 2022 Hunga-Tonga Hunga-Ha’apai eruption (HTHH) and will co-ordinate a 2025 “Hunga-Tonga impacts report” aligned to the 2026 UNEP/WMO Scientific Assessment of Ozone Depletion.

We invite Abstracts on the full breadth of science around the Hunga-Tonga volcanic cloud and its impacts, The workshop aims to encourage collaboration and discussions towards the Hunga-Tonga impacts report, and we invite interested scientists from the atmospheric science and geoscience communities to join the meeting to hear latest findings on the eruption’s effects

The online meeting will be 2 half-day sessions (13:00UT to 17:30 UT), with Hunga-Tonga science talks, and the workshop website hosting links for discussion of online poster PDFs.

Abstract submission is via the workshop website (during registration):

We are grateful to SPARC for sponsoring the event, registration is £30 standard and £15 for ECR/students.

Best Regards,

Dr. Yunqian Zhu                 Dr. Graham Mann                 Dr Bill Randel      Dr. Paul Newman
(Univ. Colorado, USA)     (University of Leeds, UK)     (NCAR, USA)       (NASA GSFC, USA)

The SPARC Hunga-Tonga impacts activity leadership team.

Announcement: Past Global Changes (PAGES) Symposium 2023


The purpose of the meeting is to highlight the broad and diverse achievements of PAGES working groups. The symposium will be held in conjunction with the PAGES scientific steering committee (SSC) meeting

PAGES supporters and partners will also be invited.


Participation is free. 

Register online via this form:

The deadline for registration is 4 May 2023.

More information, e.g. the workshop program can be found at the meeting webpage.

Tipping Points Discussion Series: Climate extremes and impacts on the terrestrial carbon-cycle and fires

We invite you to join us for our upcoming discussion on Climate extremes and impacts on the terrestrial carbon-cycle and fires, taking place on 20 April 2023, 15:00 – 16:30 CEST

This webinar is part of the Tipping Points Discussion Series organized by AIMES, the Earth Commission, the WCRP Safe Landing Climates Lighthouse Activity, and partners. The series aims to advance knowledge of tipping elements, irreversibility, and abrupt changes in the Earth system – both in natural and social systems. Our two speakers are: 

  • Ana Bastos (Max Planck Institute) – Climate risks from extremes events to the land carbon cycle: detection, attribution and uncertainties
  • Guido van der Werf (Vrije University Amsterdam) – Climate – fire interactions around the world; not all fires are equal

The discussion will be moderated by Pierre Friedlingstein (University of Exeter).

All information and the link to register are available on our website:

Deadline extended: Call for proposals to host the International Project Office of the Stratosphere-troposphere Processes And their Role in Climate (SPARC) Core Project

WCRP is delighted to open a call for proposals to host a dedicated project office in support to one of WCRP’s core projects: the Stratosphere-troposphere Processes And their Role in Climate (SPARC).

SPARC is the focal point for climate science related to the atmosphere within WCRP. Atmospheric and climate sciences are increasingly a focus of decision-making across policy, research, and industry, and of wide interest to the general public. In its 30-year (1992-2022) history, SPARC’s activities have generated a wealth of cutting-edge research and valuable datasets. SPARC has a major role in key international scientific assessment reports, including the WMO/UNEP Ozone Assessment Reports which are requested by the Parties of the Montreal Protocol and its Amendments. SPARC is moving forward with an ambitious new strategic plan from 2023, which will further advance those achievements by taking a leadership role at the forefront of international atmospheric science research. All SPARC efforts are part of WCRP’s activities and embedded in its overarching WCRP Science and Implementation Plan.

Benefits to the Host Institution

The Host Institution will significantly benefit from hosting the SPARC IPO by having a close interaction with this critical domain of research. It will serve as a great opportunity for the host to help deliver the exciting new goals of SPARC to the international community. In addition, the host institution will have the benefit of:

  • enhancing their international profile through clear identification with the WCRP international community,
  • underscoring the commitment of the national research community for international cooperation,
  • association and participation with a range of international meetings, workshops, and regional activities,
  • collaboration with other networks including those of early career scientists,
  • contributing to the well-established links that the engagement of scientists from the host institute has already established through international research projects to the global community of climate researchers.
  • career development for early career scientists in connecting them with the international research community and involvement in SPARC activities and outreach panel, 
  • playing an important role in refining and implementing WCRP’s new strategy. 

Further, development of an active scientific partnership between SPARC and scientists at the Host Institution is encouraged, with the aim of increased international exposure and additional scientific publications.

The SPARC IPO’s role will be to support this work on all related levels in close cooperation with the SPARC co-chairs and Scientific Steering Group, the WCRP leadership and the WCRP Secretariat in Geneva.

  • To download the call, click here.
  • The deadline for proposals isextended until 31 May 2022.

All communication, material and enquiries regarding this calls shall be directed in English to Hindumathi Palanisamy (tni.o1685960299mw@ym1685960299asina1685960299laph1685960299) in the WCRP Secretariat.


Biomass Burning Uncertainty: ReactioNs, Emissions and Dynamics

Overarching Objective: BBURNED aims to better quantify the current understanding of the uncertainty and variability in biomass burning emission estimation, and determine how to more accurately represent atmospheric chemistry resulting from fire. We will be a conduit to coordinate and organize the international scientific community to improve understanding of the current and future impacts of wildfires, prescribed burning and agricultural fire on public health and climate by addressing the uncertainties in atmospheric chemistry processes influenced by biomass burning. 

Sign up for the mailing list here

Announcement: Annual Seminar on Earth System Reanalysis@ ECMWF

Our 2023 Annual Seminar will take place at ECMWF’s headquarters in Reading from 4 to 8 September. The Annual Seminar is our flagship educational event, aimed at early career scientists as well as those who are more established in their field. We would appreciate you forwarding this announcement to those that wish to learn more about reanalysis. Participants are invited to submit a poster abstract to present their work on Earth System Reanalysis.

For more information, including the programme and registration and poster abstract submission forms, please visit:

If you would like to attend the Annual Seminar in-person at ECMWF’s headquarters in Reading, please submit the registration form before 28 July 2023.

A Young Scientist Conference Award (YSCA) to support the on-site participation of young scientists at the Annual Seminar is being offered by the European Meteorological Society. The deadline for applications is 14 June. Details at:

If you have any questions, please contact tni.f1685960299wmce@1685960299stnev1685960299e1685960299