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QUIGS workshop: Glacial Terminations: processes and feedbacks

Dates:
22.09 - 24.09.2020  
Venue:
Cassis, France
Contact person:
Laurie Menviel, This email address is being protected from spambots. You need JavaScript enabled to view it.

The Quaternary Interglacials (QUIGS) working group will hold the workshop "Glacial Terminations: processes and feedbacks" from 22-24 September 2020 in Cassis, France.

Venue

Maison de l’Europe et de la vie Associative, Cassis.

Logistics

The workshop, limited to 40 participants, will run for three days, and will include a few "overview" invited talks, two to three different topical sessions with talks from delegates, a poster session, and will finish by a substantial discussion session on a topic that will be studied in depth by the group: "How does the deglacial sequence of events influence the following interglacial?"

In addition to invited participants, there will be open spaces for interested scientists with a track record on glacial terminations to apply. Workshop organizers will also try to arrange remote participation through Skype/Zoom or similar.

Deadlines

Open abstract submission/registration: early May 2020
Deadline for abstract submission and travel support: early June 2020

Description

Glacial terminations, i.e. transitions from a glacial to an interglacial state, represent the largest natural global warming and large-scale climate reorganisations across the Quaternary.

While they are paced by changes in incoming solar radiation, modulated by the orbital configuration of the Earth, the large amplitude of these transitions is due to positive feedbacks within the Earth’s system involving the global carbon cycle, ice-sheet dynamics and oceanic circulation.

Glacial terminations thus provide a natural framework to study the interaction between the different components of the Earth system as well as the climate’s sensitivity to changes in radiative forcing.

An improved understanding of the processes and feedbacks occurring during glacial terminations requires constraints on the timing and amplitude of changes in continental ice-sheets and sea-level, oceanic circulation, climate, and global carbon cycle.

Aims

The aim of the workshop is to bring together scientists with expertise in climate, oceanic processes, carbon cycle, ice-sheet dynamics and sea-level changes, from both a data and modeling perspective, to improve our understanding of the sequence of events occurring during terminations.

High-resolution proxy records and transient numerical simulations of Termination I (TI, ~18-10 ka) have led to significant advances in our understanding of the sequence of events, but large gaps remain.

As part of the PMIP4 initiative, new transient simulations of TI are available, with more coming online in 2020, thus providing an exciting opportunity to improve our understanding of TI. In addition, new datasets and transient numerical simulations are now available for Termination II (TII, ~140-129ka), including efforts initiated as part of the first phase of QUIGS. The new results allow new model-data comparisons as well as comparisons between TI and TII.

The following questions will be addressed through an integrative and mutli-disciplinary approach:

1. How does the deglacial sequence of events influence the following interglacial? The the last two terminations will be studied in detail, but the framework will be extended to all terminations.
2. What are the causes for the observed differences between TI and TII?

Confirmed participants

- Stephen Barker, Cardiff University, UK
- Amaelle Landais, LSCE, France
- Kazuyo Tachikawa, CEREGE, France
- Ruza Ivanovic, Leeds University, UK
- Lorraine Lisiecki, University of California at Santa Barbara, USA
- Ayako Abe-Ouchi, University of Tokyo, Japan
- Jimin Yu, ANU, Australia
- (ECR) Julia Gottschalk, Lamont-Doherty Earth Observatory, Palisades, USA
- (ECR) Bo Liu, MPI, Germany
- (ECR) Dan Lowry, Victoria University of Wellington, New Zealand
- (ECR) Nick Yeung, UNSW, Australia

Registration, abstracts and deadlines

Information on how and when to apply will be made available in early 2020.

Financial support

PAGES has provided some support for the attendance of between eight to 10 early-career researchers (ECRs) and scientists from developing countries. Details on how to apply will be made available as soon as possible.

Background

This is the second workshop of QUIGS Phase 2. During the second workshop of Phase 1, a PMIP4 protocol to perform transient simulations of TII was set up (Menviel et al. 2019), which also included key paleo-records across TII to compare with simulations.

At this workshop, in addition to looking at progress on the research questions developed in Phase 1, we expect to hear the outcome of the first transient simulations of TII, as well as the outcome of the PMIP4 transient simulations of TI.

Planned products

In addition to the workshop report for Past Global Changes Magazine, we plan to write a manuscript that will most likely focus on the impact of the deglacial sequence of events on the following interglacial.

Outreach event

We are planning to organize a public talk, followed by a Q&A session, on "Past, present and future climate" on the last evening of the workshop. More information will be provided as soon as possible.

Data stewardship

If data compilation are generated during the workshop, then they will be made publicly available through a paleo-data website (e.g. PANGEA), or as a supplement to a published manuscript, as has been the case for all previous outputs of this working group.

Further information

Contact workshop organizer Laurie Menviel, University of New South Wales, Sydney, Australia: This email address is being protected from spambots. You need JavaScript enabled to view it.