Atlantis Summit

Summit Introduction

Second Atlantis Summit May 2-6 2022

Post-Summit training workshop to follow the main meeting (9-11 May)


There will be two hub sites – Bergen, Norway and in Hobart, Australia. The two hubs will overlap as one big meeting for 4 hours per day, with another 4 hours of local sessions in each location.


A registration link and payment system will be available in coming months. We are still determining a fair charge given the hybrid form of the conference. In the short term if you could email us to let us know of your interest it will be a great help to planning.


A high level agenda for the meeting is available here.


Details on the background are given below but we have some key themes and key notes to match:

Julia Blanchard: On the general theme of advancing long term climate projections with ecosystem models

Sarah Gaichas: On the general theme of linking Atlantis ‘operating models’ with fishery stock assessments

TBA: On the general theme of using artificial Intelligence and machine learning to calibrate complex models

Background to the Second Atlantis Summit

Marine resource management agencies worldwide have committed to applying Ecosystem-based management (EBM). The path from creation to implementation and use of EBM is slowly emerging. Ecosystem models which incorporate all aspects of the ecosystem, such as end-to-end models, can be useful tools in (1) synthesising existing data streams and ecosystem feedback dynamics and identify research gaps, (2) linking the different components in an ecosystem dynamically (oceanography, ecology, habitat, economy, human use); (3) visualising (and communicating) trade-offs (e.g. between ecological and human wellbeing); and (4) projecting future ecosystem trends based on climate change trajectories or changes in management.

One such end-to-end model is Atlantis, developed by CSIRO Australia (, which has now been applied from polar to tropical systems across the world. Because of its modular structure, different components can be more or less detailed to focus on various issues with direct and indirect emerging impacts to the ecosystem (e.g. climate change effect on habitat and indirectly on habitat-dependent species and its predators; impacts of fishery regulations on fishers and indirectly on the local economy). Therefore, Atlantis is a highly effective tool to use to gain understanding of coming environmental change and to explore options before the implementation phase of actual management changes as it can evaluate if desired outcomes are likely to be met by those changes, for example, by using the built in Management Strategy Evaluation functionality. 

In December of 2015, the global Atlantis community convened the first Atlantis Summit (  This included training sessions, tool development, and discussions of best practices (e.g. for handling climate change, fleet dynamics, and ecological processes). Among the outputs were three peer reviewed papers, outputs to support modellers (a User Manual, an Atlantis Google group), and improvements to the CSIRO Atlantis wiki. Since 2015, Atlantis has further matured and a second Atlantis Summit is being organised. At the Atlantis Summit 2,  our objectives include advancing long term climate projections by linking Atlantis to global and regional models, applications of Artificial Intelligence and machine learning for model calibration and validation,  and linking Atlantis ‘operating models’ to fishery stock assessments to assess their ecosystem performance. 


The Atlantis ecosystem model framework has been broadly shared by CSIRO across the globe. The success of this framework has been facilitated by distributed code, international partnerships, and the modeller support mechanisms put in place after the first Atlantis Summit five years ago.

Despite these successes, the modelling teams are distributed across many time zones and institutions, and there are innovations and challenges from particular regions that should be shared with the international Atlantis community.  At the Atlantis Summit 2, we aim to compare approaches across nations, share technical aspects of this, and also discuss how the results have been brought into the management of living marine resources. 

Atlantis also has a “living” code base, which changes through time as new functionality is requested. It is difficult for any one individual to remain knowledgeable on all these options, and the Summit presents an excellent opportunity to help people familiarise themselves with the new options, which may be relevant for questions in their region (for example, expanded estuarine and land-based components, sea-ice communities, representation of contaminant uptake and dispersal, noise). There is also the desire to use the Summit to facilitate discussions of the next steps concerning expanding, refining and strengthening what can be done with Atlantis.

The approach in response to COVID-19

To increase diversity and accessibility and to be cognitive of the pandemic,  we plan for a hybrid Atlantis Summit 2. Aspects that can be conducted online (e.g. training, keynote speaker seminars, round-robin presentation of developed/in-development models) will be staged before the meeting, and for other aspects, there will be the possibility to participate both in person or online (discussions, break-out groups, demonstrations, working on publications).

A detailed agenda will be posted in coming months, but our main approach during the five days of Atlantis Summit 2 will be to replicate five key aspects from the first Atlantis Summit:  

  1. Hands-on workshops for new users.  We aim for 1.5 days of introductory material for new users, based on previous courses taught by CSIRO and NOAA staff. 
  2. Hands-on group assistance with models in progress.  These will be small informal presentations given by those working through new model development, with assistance and tools offered by other users.  
  3. Presentations regarding key modelling decisions, challenges, and tools. The aims are to update a collective understanding of best practices, and new tools developed to implement those. To keep the program as interactive as possible these presentations will be presented as pre-recorded talks, with synchronous Q&A sessions during the meeting.
  4. Collaborative manuscripts: Three invited international experts will motivate these collaborative manuscripts with in meeting work sessions held to advance the manuscripts. The idea is to follow the format of Olsen et al. (2018, Frontiers in Marine Science, 5, 64), bringing ensembles of regional Atlantis models to bear on international marine management challenges, including:  
  • Climate change effects on marine systems
  • Identifying robust stock assessment and management practices
  • Applying techniques such as AI/machine learning to new regions/models,  e.g. to improve model calibration and validation.  

Throughout the Summit we aim to bolster user support (e.g. via the wiki, Google group [live chat session throughout the week], living User Manual, or new mechanisms) and to facilitate social events on site, on line and at distributed events around the globe where Atlantis modellers can come together in Europe, USA, Australia etc.

Scientific Steering Committee (SC): Holly Perryman, Vidette McGregor, Mariska Weijerman, Howard Townsend, Gavin Fay, Ingrid van Putten, Isaac Kaplan, Marie Savina Rolland, Javier Porobic, Myron Peck, Beth Fulton