Dynamics between land and sea: a Breizh history of time
How can we think about socio-ecosystems through the prism of temporalities? This was the central question that animated the 2025 edition of the Winter School of the Réseau des Zones Ateliers (RZA), organised this year in the unique setting of the bay of Brest, in Logonna-Daoulas, from 3 to 7 March 2025.
For three days, 25 young researchers (doctoral and post-doctoral students, ATER) immersed themselves in the dynamics of the land-sea continuum, exploring how time scales influence scientific research, land management and public policy.
An interdisciplinary and immersive programme
On the programme for this intense week, under a radiant sun:
The winter school opened with three inspiring lectures and talks:
The carbon cycle on the scale of geological time by Stefan Lalonde,
The disturbances of long time by Rémi Beau
The time of increased meaning by Olivier Ragueneau
Four themed workshops to experiment
The participants were divided into four groups, to enable them to follow four workshops each exploring a key axis of the land-sea continuum:
Water quality and the transfer of contaminants in the land-sea continuum.
This workshop focused on issues related to water quality at the bottom of the bay of Brest, including toxic microalgae (Alexandrium minutum) and antibiotic resistance. Samples and measurements were taken at sea (with the ship Hésione) and in the surrounding rivers to assess the physicochemical and bacteriological parameters in the land-sea continuum. The samples were analysed in a mobile laboratory at Moulin Mer.
Socio-ecosystem trajectory of an agro-marine system: Ecological time and the time of societies, complexity of renewed governance
This workshop explored the socio-ecosystemic trajectory of the land-sea continuum in the roadstead of Brest, through a multidisciplinary approach combining biology, ecology, history, archaeology, sociology and governance. Four sub-workshops offered opportunities for field observation, meetings with local stakeholders (oyster and scallop farmers, fishermen, farmers, elected representatives of Brest Métropole, TerraRade) and collective reflections on the ecological, social and political dynamics at work in this agro-marine territory. The aim was to foster a renewed understanding of this continuum and to consider more coherent and sustainable forms of governance.
Methodology in arts and sciences – Thinking continuum and temporalities: The contribution of arts and sciences to renewing our view of socio-ecosystems.
This workshop offered a transdisciplinary exploration of the links between the arts, sciences and society to renew our relationship with coastal socio-ecosystems and watersheds. Using concrete examples (Molène, Aulne Maritime, Piave river), the participants discovered research-creation and research-action approaches integrating long time frames, traces and sensitive representations of the living world. The aim was to develop innovative methods of co-constructing research and to foster a common culture across disciplines through artistic practices.
Coastal risk management through role-playing in a serious game.
This workshop offered a serious game scenario to explore the issues of coastal risk management in a fictitious but realistic context with the serious game developed by AMURE; Coastal Risks in Plonevez-les-Flots. The participants, in the shoes of agents from different municipal services, had to arbitrate between budgetary constraints, the expectations of the inhabitants and reducing vulnerability to climate change. The aim is to promote a systemic and interdisciplinary approach to the complex issues at the Human-Nature interface, while questioning collaborative practices.
Two evenings were organised: one on the scientific mediation of the Brest Iroise Workshop Zone, with: the ISblue SEALEX-PACTE Project stand (Clara Valero and Lucas Bosseboeuf), the Evol’Iroise interactive poster (Sébastien Hervé & Aurélie Penaud) and the Virtual Reality stand (Maxime Kernec and Charlotte Gasne–Destaville) and a participatory workshop on the commitment of researchers organised by Mélanie Raimonet and Olivier Ragueneau.
An original and creative presentation
Throughout the week, the discussions were enriched by the PIBA troupe, which accompanied the participants in an innovative presentation combining science, radio narration and staging. A great way to explore how to convey the complexity of socio-ecosystems in a different way!
A space for dialogue and engagement
Far from being a simple academic seminar, this winter school was a real space for co-construction, promoting exchanges between disciplines and local stakeholders. How can we integrate issues of temporality into our research and actions? This question ran through all the discussions, and brought out new perspectives for thinking about socio-ecosystems.
https://www-iuem.univ-brest.fr/wp-content/uploads/2025/04/Ecole_Hiver_RZA_2025-Main.jpg4231210Sebastien Hervehttps://www-iuem.univ-brest.fr/wp-content/uploads/2018/06/iuem-logo-header.pngSebastien Herve2025-04-15 11:06:212025-04-22 10:17:45The RZA 2025 Winter School: land and sea dynamics
The photographer Grégoire Eloy from the ‘Tendance Floue’ collective is presenting an exhibition entitled ‘Troisième Nature’ at the Champs Libres in Rennes from 3 March to 21 September 2025.
From the glaciers of the Pyrenees to the foreshore of Finistère, this exhibition offers a photographic journey through the geological, forest and marine landscapes explored by Grégoire Eloy (winner of the prestigious Niépce Prize in 2021) over the past ten years.
All these projects attempt to understand the issues related to the formation and evolution of matter and the environment, alongside scientists specialising in matter and living organisms. At the crossroads of documentary and experimentation, Grégoire Eloy’s work mixes scales and techniques. He gives us an immersive vision of this experience of the natural environment, like an initiation rite that the photographer imposes on himself to better enter into the intimacy of the landscape.
Between October 2023 and May 2024, Grégoire Eloy notably followed our colleagues Jacques Grall and Vincent Le Garrec from the IUEM benthic observatory in the field and in the laboratory.
https://www-iuem.univ-brest.fr/wp-content/uploads/2025/03/Troisieme-nature-main.jpg4231210Sebastien Hervehttps://www-iuem.univ-brest.fr/wp-content/uploads/2018/06/iuem-logo-header.pngSebastien Herve2025-03-14 16:39:232025-03-14 16:39:23“Troisième Nature” exhibition at the Champs-Libres, in Rennes
Today, universities and research are under attack on an unprecedented scale. The offensive is particularly alarming in the United States, where research institutions, regulatory agencies, civil rights and the very foundations of democracy are being undermined by the Trump administration and Mr Musk’s Department of Government Efficiency (DOGE). International solidarity is all the more essential as Europe is facing similar threats.
Echoing the Stand-up for Science day initiated in the United States, calls for mobilisation actions were organised (marches, rallies, symposia, experimental presentations, etc.) on 7 March in every university town in France. The objective was clear: to defend the sciences and the humanities, academic freedom and the university as pillars of a democratic society.
To take part in this appeal, a gathering was held in front of the IUEM at 12.30 pm. Largely attended by the IUEM community and our colleagues from the Technopôle, it was immortalised by a group photo (thanks to Sylvain Petek) and was the subject of articles in the local press.
https://www-iuem.univ-brest.fr/wp-content/uploads/2025/03/SUFS-2025-main.jpg4231210Sebastien Hervehttps://www-iuem.univ-brest.fr/wp-content/uploads/2018/06/iuem-logo-header.pngSebastien Herve2025-03-10 10:23:572025-03-10 10:23:57Stand Up for Science !
The 2024 Seignelay Prize of the Western Brittany Committee of the French Institute of the Sea and the National Chamber of Maritime Brokers of France will be awarded during their General Assembly at the CCI Finistère on Thursday, March 6, 2025, to François Gokce, a master’s student at IUEM/UBO.
The purpose of this prize is to reward a student for their work in favor of the sea and to support them in continuing their studies, entering professional life, or carrying out a maritime project.
This year, the award goes to François Gokce for his master’s thesis within the “Applied Economics for Agriculture, the Sea, and the Environment” (E2AME) – Blue Economy track.
He will notably receive a prize valued at 1,000 euros.
Congratulations to François, who was also the first work-study student at Amure during the 2023-24 academic year!
Each year, the students of the Master’s in Maritime Spaces and Activities Law, affiliated with the AMURE research laboratory and IUEM, organize a thematic research seminar. This year, in the context of maritime and coastal transitions, the topic is: “Marine Animals Through the Lens of Law.”
PROGRAM
08h30-09h00 :PARTICIPANT WELCOME
09h00-09h30 :OPENING REMARKS
– Mickael LAVAINE, Doyen de la Faculté de Droit, Économie, Gestion, AES, Maître de conférences de droit public, LabLex, UBO
– Arnaud MONTAS, Professeur de droit privé, Amure, UBO (organisateur)
– Thomas LECLERC, Maître de conférences de droit public, Amure, UBO (codirecteur du Master)
09h30-09h45 :BRIEF INTRODUCTION TO ANIMAL LAW
09:30 – 09:45 | BRIEF INTRODUCTION TO ANIMAL LAWFrançois-Xavier ROUX-DEMARE, Associate Professor of Private Law, LabLex, UBO
09:45 – 12:00 | CURRENT ISSUES SEMINAR (by work-study students)
09:45 – 10:30 | Session #1: The Protection of Certain Species
Yseult SAVY & Lizaig PRIJAC – The Protection of Common Dolphins Through the Closure of Fisheries in the Bay of Biscay
Noémie RAFFRAY & Alexis CHOISNE – The Maritime Transport of Live Animals
☕ 10:30 – 11:00 | COFFEE BREAK
11:00 – 12:15 | Session #2: The Specific Case of Cetaceans
Tadeusz HRODEJ & Melissa LE FLOCH – Whale Hunting
Chloé LE MERCIER & Thibault SOREIL – Ship Collisions with Cetaceans
Léa GLANCLAUDE & Romane VINÇONEAU – The Impact of Underwater Noise on Cetaceans: A Legal Silence?
12:15 – 12:30 | CONCLUSION OF THE CURRENT ISSUES SEMINAR
M. Sami HASSANI, Head of Aquatic Fauna Conservation, Scientific Department, Océanopolis
Pauline MOUTIER & Yaguala NDAO – The Spread of Invasive Species from Ballast Water
Elisabeth GBAPO & Thomas MERRER – The Legal Protection of Sharks
Lola DEPAGNE-BIELSA & Yann AUBIN – Krill Fishing in Antarctica
15:30 – 15:45 | CONCLUSION OF THE RESEARCH SEMINAR
M. Yann TEPHANY, Associate Professor of Private Law, University of the Antilles,
Center for Legal Studies and Research in Business Law
https://www-iuem.univ-brest.fr/wp-content/uploads/2025/03/amure-news-ban-web-1210.jpg6051210Severine Julienhttps://www-iuem.univ-brest.fr/wp-content/uploads/2018/06/iuem-logo-header.pngSeverine Julien2025-03-04 18:27:242025-03-04 18:27:28Annual Seminar of the DEAM Master’s Program
In March 2025, 32 high school students from Brest will be embarking on a scientific and civic adventure with the creation of a Club Jeunes Océan – an initiative launched by the IRD in partnership with Surfrider Foundation Europe. Supervised by their teachers and an oceanography researcher from the institute, they will learn about the scientific approach to exploring the impact of marine waste and how to take concrete action to protect the environment.
The Young Ocean Clubs initiative launched by the IRD is part of ‘2025, Year of the Sea’, in preparation for the United Nations Conference on the Oceans, to be held in Nice in June 2025. Seven clubs have been launched in mainland France, overseas France and Africa. Supervised by four teachers of Life and Earth Sciences, Physics and Chemistry, History and Geography and French, the Brest branch will benefit from the scientific support of Christophe Maes, a researcher at LOPS (Physical and Space Oceanography Laboratory). A specialist in the dispersal of plastics at sea, he is studying their pathway on a global scale to better understand their impact and propose solutions.
Field trips to analyse coastal pollution
The Club Jeunes Océan programme is organised around eight sessions combining awareness-raising, an introduction to the scientific approach and practical experience. After an introduction to the issues involved in protecting the oceans, the pupils will head out to the coast to collect and analyse waste. With the support of our researcher, and using the data collected in the field, the students will carry out an investigation to try and understand where the waste comes from, the behaviour that causes it and how to take effective action to limit this pollution.
A plea to defend their ideas to the public
As well as making scientific observations, the students will be asked to draw up a plea to raise awareness among the public and decision-makers. They will work together with their supervisors to determine the awareness-raising action they want to take, thus becoming true ambassadors for the preservation of the oceans.
https://www-iuem.univ-brest.fr/wp-content/uploads/2025/02/pexels-christopher-politano-978995-30145743-1.jpg4531210Benoit Soyerhttps://www-iuem.univ-brest.fr/wp-content/uploads/2018/06/iuem-logo-header.pngBenoit Soyer2025-02-26 17:18:252025-02-26 17:18:25Launch of an IRD Ocean Youth Club in Brest
‘Tropical cyclone dynamics revealed by satellite observations of surface wind speeds: the major contribution of the surface wind structure near the core’.
Despite advances in the prediction of tropical cyclone tracks and wind speeds in the outer region, the numerical representation of the strongest winds associated with the most intense events remains an open question, mainly due to the small size of the cyclone core and the difficulty in understanding and resolving the turbulent exchanges between the ocean and atmosphere. Observational limitations have long hampered accurate measurements of the ocean surface near the core region in extreme wind conditions, while geostationary satellites help characterise cloud patterns but do not provide direct information on the air-sea interface. Recently, synthetic aperture radar (SAR) has emerged as a promising satellite technology capable of producing high-resolution two-dimensional measurements of wind speeds at the ocean surface, thanks to new acquisition modes and algorithmic developments. Given these new observational opportunities, we are exploring the contribution of near-core structural features, only discernible through high-resolution instruments, to cyclone dynamics. Using a simple theoretical framework and examining its consistency with SAR measurements, we demonstrate that surface winds near the core control the evolution of the cyclone wind structure. The framework developed illustrates how future measurements of ocean-atmosphere boundary layer characteristics could benefit from short- and long-term monitoring of tropical cyclones.
Driving Innovation.
Communication at the Heart of European Universities’ Transformation
The role of communication in universities has evolved profoundly, becoming a strategic cornerstone in their mission to educate, research, and engage.
With an ever-expanding array of tools and platforms—ranging from digital channels to in-person events—universities face the challenge of navigating a complex and dynamic communication landscape.
The rise of artificial intelligence and the sheer volume of information demand innovative strategies to capture attention and foster meaningful connections.
https://www-iuem.univ-brest.fr/wp-content/uploads/2025/02/pexels-pin70-102980281.jpg4231210Laure De Montbronhttps://www-iuem.univ-brest.fr/wp-content/uploads/2018/06/iuem-logo-header.pngLaure De Montbron2025-02-07 11:48:372025-02-07 11:48:41Test LJ
In 2023, the IPCC deemed it highly unlikely that the AMOC would collapse by the end of the century. In a recent letter, some experts believe that this risk has been underestimated. What is this current? How does it influence the climate? Is its collapse imminent? What would be the consequences?
With
Didier Swingedouw Climatologist at the Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC) laboratory in Bordeaux.
Pascale Lherminier Physicist at Ifremer, UMR LOPS in Brest.
Global warming is threatening a vast set of marine currents in the Atlantic Ocean: the AMOC. According to 43 international experts, we have underestimated the risks of shutting it down. What would be the consequences?
The AMOC is a system of ocean currents, of which the Gulf Stream is a part. It is one of the major drivers of climate, playing a crucial role in redistributing heat around the planet, and is one of the reasons why our climate in Western Europe is temperate. In a recent letter, experts stress the collateral effects of its slowing down, or even its collapse. Because this is now a probable risk.
https://www-iuem.univ-brest.fr/wp-content/uploads/2025/02/IMG_6231.jpg4231210Benoit Soyerhttps://www-iuem.univ-brest.fr/wp-content/uploads/2018/06/iuem-logo-header.pngBenoit Soyer2025-02-07 11:44:532025-02-07 16:04:14AMOC, the climate against the current – Pascale Lherminier, UMR LOPS, on France Culture
Grégory Charrier, lecturer at the UBO and head of the SML biology master’s programme, will be giving a presentation of the course on 11 February from 6 to 8 pm during a live broadcast on the Youtube platform.
This live event will provide an opportunity to present the content and objectives of the course and to explain the application procedures for Master 1 and Master 2.
The live recording will remain available for later viewing.
https://www-iuem.univ-brest.fr/wp-content/uploads/2025/02/YTLive-Master-Bio2025-main.jpg4231210Sebastien Hervehttps://www-iuem.univ-brest.fr/wp-content/uploads/2018/06/iuem-logo-header.pngSebastien Herve2025-02-06 11:08:532025-02-06 11:09:10Youtube Live presentation of the SML Biology Masters on 11 February from 6pm to 8pm
The RZA 2025 Winter School: land and sea dynamics
newsDynamics between land and sea: a Breizh history of time
How can we think about socio-ecosystems through the prism of temporalities? This was the central question that animated the 2025 edition of the Winter School of the Réseau des Zones Ateliers (RZA), organised this year in the unique setting of the bay of Brest, in Logonna-Daoulas, from 3 to 7 March 2025.
For three days, 25 young researchers (doctoral and post-doctoral students, ATER) immersed themselves in the dynamics of the land-sea continuum, exploring how time scales influence scientific research, land management and public policy.
An interdisciplinary and immersive programme
On the programme for this intense week, under a radiant sun:
The winter school opened with three inspiring lectures and talks:
Four themed workshops to experiment
The participants were divided into four groups, to enable them to follow four workshops each exploring a key axis of the land-sea continuum:
Two evenings were organised: one on the scientific mediation of the Brest Iroise Workshop Zone, with: the ISblue SEALEX-PACTE Project stand (Clara Valero and Lucas Bosseboeuf), the Evol’Iroise interactive poster (Sébastien Hervé & Aurélie Penaud) and the Virtual Reality stand (Maxime Kernec and Charlotte Gasne–Destaville) and a participatory workshop on the commitment of researchers organised by Mélanie Raimonet and Olivier Ragueneau.
An original and creative presentation
Throughout the week, the discussions were enriched by the PIBA troupe, which accompanied the participants in an innovative presentation combining science, radio narration and staging. A great way to explore how to convey the complexity of socio-ecosystems in a different way!
A space for dialogue and engagement
Far from being a simple academic seminar, this winter school was a real space for co-construction, promoting exchanges between disciplines and local stakeholders. How can we integrate issues of temporality into our research and actions? This question ran through all the discussions, and brought out new perspectives for thinking about socio-ecosystems.
“Troisième Nature” exhibition at the Champs-Libres, in Rennes
newsThe photographer Grégoire Eloy from the ‘Tendance Floue’ collective is presenting an exhibition entitled ‘Troisième Nature’ at the Champs Libres in Rennes from 3 March to 21 September 2025.
From the glaciers of the Pyrenees to the foreshore of Finistère, this exhibition offers a photographic journey through the geological, forest and marine landscapes explored by Grégoire Eloy (winner of the prestigious Niépce Prize in 2021) over the past ten years.
All these projects attempt to understand the issues related to the formation and evolution of matter and the environment, alongside scientists specialising in matter and living organisms. At the crossroads of documentary and experimentation, Grégoire Eloy’s work mixes scales and techniques. He gives us an immersive vision of this experience of the natural environment, like an initiation rite that the photographer imposes on himself to better enter into the intimacy of the landscape.
Between October 2023 and May 2024, Grégoire Eloy notably followed our colleagues Jacques Grall and Vincent Le Garrec from the IUEM benthic observatory in the field and in the laboratory.
Stand Up for Science !
newsToday, universities and research are under attack on an unprecedented scale. The offensive is particularly alarming in the United States, where research institutions, regulatory agencies, civil rights and the very foundations of democracy are being undermined by the Trump administration and Mr Musk’s Department of Government Efficiency (DOGE). International solidarity is all the more essential as Europe is facing similar threats.
Echoing the Stand-up for Science day initiated in the United States, calls for mobilisation actions were organised (marches, rallies, symposia, experimental presentations, etc.) on 7 March in every university town in France. The objective was clear: to defend the sciences and the humanities, academic freedom and the university as pillars of a democratic society.
To take part in this appeal, a gathering was held in front of the IUEM at 12.30 pm. Largely attended by the IUEM community and our colleagues from the Technopôle, it was immortalised by a group photo (thanks to Sylvain Petek) and was the subject of articles in the local press.
The 2024 Seignelay Prize
newsThe 2024 Seignelay Prize of the Western Brittany Committee of the French Institute of the Sea and the National Chamber of Maritime Brokers of France will be awarded during their General Assembly at the CCI Finistère on Thursday, March 6, 2025, to François Gokce, a master’s student at IUEM/UBO.
The purpose of this prize is to reward a student for their work in favor of the sea and to support them in continuing their studies, entering professional life, or carrying out a maritime project.
This year, the award goes to François Gokce for his master’s thesis within the “Applied Economics for Agriculture, the Sea, and the Environment” (E2AME) – Blue Economy track.
He will notably receive a prize valued at 1,000 euros.
Congratulations to François, who was also the first work-study student at Amure during the 2023-24 academic year!
Learn more
Annual Seminar of the DEAM Master’s Program
newsPROGRAM
– Mickael LAVAINE, Doyen de la Faculté de Droit, Économie, Gestion, AES, Maître de conférences de droit public, LabLex, UBO
– Arnaud MONTAS, Professeur de droit privé, Amure, UBO (organisateur)
– Thomas LECLERC, Maître de conférences de droit public, Amure, UBO (codirecteur du Master)
09:30 – 09:45 | BRIEF INTRODUCTION TO ANIMAL LAWFrançois-Xavier ROUX-DEMARE, Associate Professor of Private Law, LabLex, UBO
09:45 – 12:00 | CURRENT ISSUES SEMINAR (by work-study students)
09:45 – 10:30 | Session #1: The Protection of Certain Species
Yseult SAVY & Lizaig PRIJAC – The Protection of Common Dolphins Through the Closure of Fisheries in the Bay of Biscay
Noémie RAFFRAY & Alexis CHOISNE – The Maritime Transport of Live Animals
☕ 10:30 – 11:00 | COFFEE BREAK
11:00 – 12:15 | Session #2: The Specific Case of Cetaceans
Tadeusz HRODEJ & Melissa LE FLOCH – Whale Hunting
Chloé LE MERCIER & Thibault SOREIL – Ship Collisions with Cetaceans
Léa GLANCLAUDE & Romane VINÇONEAU – The Impact of Underwater Noise on Cetaceans: A Legal Silence?
12:15 – 12:30 | CONCLUSION OF THE CURRENT ISSUES SEMINAR
M. Sami HASSANI, Head of Aquatic Fauna Conservation, Scientific Department, Océanopolis
🥗 12:30 – 14:00 | LUNCH BREAK
14:00 – 16:00 | RESEARCH SEMINAR (by non-work-study students)
14:00 – 15:30 | Session #3
Pauline MOUTIER & Yaguala NDAO – The Spread of Invasive Species from Ballast Water
Elisabeth GBAPO & Thomas MERRER – The Legal Protection of Sharks
Lola DEPAGNE-BIELSA & Yann AUBIN – Krill Fishing in Antarctica
15:30 – 15:45 | CONCLUSION OF THE RESEARCH SEMINAR
M. Yann TEPHANY, Associate Professor of Private Law, University of the Antilles,
Center for Legal Studies and Research in Business Law
🗳 16:00 | DELIBERATION
Launch of an IRD Ocean Youth Club in Brest
newsIn March 2025, 32 high school students from Brest will be embarking on a scientific and civic adventure with the creation of a Club Jeunes Océan – an initiative launched by the IRD in partnership with Surfrider Foundation Europe. Supervised by their teachers and an oceanography researcher from the institute, they will learn about the scientific approach to exploring the impact of marine waste and how to take concrete action to protect the environment.
The Young Ocean Clubs initiative launched by the IRD is part of ‘2025, Year of the Sea’, in preparation for the United Nations Conference on the Oceans, to be held in Nice in June 2025. Seven clubs have been launched in mainland France, overseas France and Africa. Supervised by four teachers of Life and Earth Sciences, Physics and Chemistry, History and Geography and French, the Brest branch will benefit from the scientific support of Christophe Maes, a researcher at LOPS (Physical and Space Oceanography Laboratory). A specialist in the dispersal of plastics at sea, he is studying their pathway on a global scale to better understand their impact and propose solutions.
Field trips to analyse coastal pollution
The Club Jeunes Océan programme is organised around eight sessions combining awareness-raising, an introduction to the scientific approach and practical experience. After an introduction to the issues involved in protecting the oceans, the pupils will head out to the coast to collect and analyse waste. With the support of our researcher, and using the data collected in the field, the students will carry out an investigation to try and understand where the waste comes from, the behaviour that causes it and how to take effective action to limit this pollution.
A plea to defend their ideas to the public
As well as making scientific observations, the students will be asked to draw up a plea to raise awareness among the public and decision-makers. They will work together with their supervisors to determine the awareness-raising action they want to take, thus becoming true ambassadors for the preservation of the oceans.
CNFGG thesis prize awarded to Arthur Avenas
newsFrench National Committee for Geodesy and Geophysics (CNFGG) thesis prize in the Geophysics category awarded to :
Arthur Avenas, UMR LOPS, for his thesis entitled ‘Tropical cyclone dynamics revealed by satellite observations of surface wind speed: the major contribution of the surface wind structure near the core’, prepared at the École nationale supérieure Mines-Télécom Atlantique Bretagne Pays de Loire and defended on 28 March 2024.
‘Tropical cyclone dynamics revealed by satellite observations of surface wind speeds: the major contribution of the surface wind structure near the core’.
Despite advances in the prediction of tropical cyclone tracks and wind speeds in the outer region, the numerical representation of the strongest winds associated with the most intense events remains an open question, mainly due to the small size of the cyclone core and the difficulty in understanding and resolving the turbulent exchanges between the ocean and atmosphere. Observational limitations have long hampered accurate measurements of the ocean surface near the core region in extreme wind conditions, while geostationary satellites help characterise cloud patterns but do not provide direct information on the air-sea interface. Recently, synthetic aperture radar (SAR) has emerged as a promising satellite technology capable of producing high-resolution two-dimensional measurements of wind speeds at the ocean surface, thanks to new acquisition modes and algorithmic developments. Given these new observational opportunities, we are exploring the contribution of near-core structural features, only discernible through high-resolution instruments, to cyclone dynamics. Using a simple theoretical framework and examining its consistency with SAR measurements, we demonstrate that surface winds near the core control the evolution of the cyclone wind structure. The framework developed illustrates how future measurements of ocean-atmosphere boundary layer characteristics could benefit from short- and long-term monitoring of tropical cyclones.
Test LJ
Actualité archiveDriving Innovation.
Communication at the Heart of European Universities’ Transformation
The role of communication in universities has evolved profoundly, becoming a strategic cornerstone in their mission to educate, research, and engage.
With an ever-expanding array of tools and platforms—ranging from digital channels to in-person events—universities face the challenge of navigating a complex and dynamic communication landscape.
AMOC, the climate against the current – Pascale Lherminier, UMR LOPS, on France Culture
newsIn 2023, the IPCC deemed it highly unlikely that the AMOC would collapse by the end of the century. In a recent letter, some experts believe that this risk has been underestimated. What is this current? How does it influence the climate? Is its collapse imminent? What would be the consequences?
With
Global warming is threatening a vast set of marine currents in the Atlantic Ocean: the AMOC. According to 43 international experts, we have underestimated the risks of shutting it down. What would be the consequences?
The AMOC is a system of ocean currents, of which the Gulf Stream is a part. It is one of the major drivers of climate, playing a crucial role in redistributing heat around the planet, and is one of the reasons why our climate in Western Europe is temperate. In a recent letter, experts stress the collateral effects of its slowing down, or even its collapse. Because this is now a probable risk.
Youtube Live presentation of the SML Biology Masters on 11 February from 6pm to 8pm
news, SML NewsGrégory Charrier, lecturer at the UBO and head of the SML biology master’s programme, will be giving a presentation of the course on 11 February from 6 to 8 pm during a live broadcast on the Youtube platform.
This live event will provide an opportunity to present the content and objectives of the course and to explain the application procedures for Master 1 and Master 2.
The live recording will remain available for later viewing.