Sea'ties

Facilitate the development and implementation of adaptation responses for coastal cities threatened by sea level rise

NEW

Publication of the policy recommendations for coastal cities to adapt to sea level rise

The “Policy Recommendations for Coastal Cities to Adapt to Sea Level Rise” draw upon the scientific expertise and on-the-ground experiences of over 230 practitioners convened in regional workshops and are supported by 80 organisations involved in the five continents.

Intended for local, national, regional and international decision-makers, they highlight four priority actions:

Solutions

Planning long-term adaptation responses tailored to the local context

Social Justice

Prioritising social imperatives in adaptation policies

Knowledge

Developing new ways to generate and share operational knowledge on adaptation

Finance

Building a sustainable finance approach for coastal cities

What is at stake?

Coastal cities facing sea level rise

The Intergovernmental Panel on Climate Change (IPCC) indicates that by 2100, without a drastic reduction of our greenhouse gases emissions, sea levels could rise by more than one meter, while associated extreme climate events are expected to become more frequent and intense. These phenomena will reshape all coastlines, where the population is most dense and continues to grow.

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For coastal cities and their territories, the challenges at hand are colossal: ensuring the safety of residents, safeguarding critical infrastructure and ports, relocating homes or economic activities, along preserving natural areas. All of these issues need to be urgently addressed while simultaneously informing and engaging the entire population and relevant stakeholders.

Reimagining coastal cities and their territories, while considering social, economic, and environmental issues, will necessitate making critical and intricate decisions in the years ahead.

To learn more

About the sea'ties initiative

The Sea’ties Initiative aims to facilitate the development of public policies and the implementation of adaptation solutions to support coastal cities threatened by sea level rise.

Sea’ties is an international initiative led by the Ocean & Climate Platform, mobilising mid-sized cities from across the globe featuring a diversity of climatic, geographic, social, economic, and political contexts.

The initiative is intended for elected representatives, urban planners and all stakeholders involved in this transition by acting as a forum to exchange knowledge and experiences of sustainable solutions towards greater coastal resilience. Given that a diversity of solutions has already been implemented across the world, it can be inspirational for other coastal cities and territories

By connecting experiences, characterising them through scientific works and disseminating them in a range of formats, we can promote leading practices and support the choices of policy-makers and regional authorities.

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Collecting and disseminating knowledge

Sea’ties is dedicated to compiling scientific knowledge through accessible syntheses and databases, facilitating the identification and analysis of solutions implemented by coastal cities worldwide.

This initiative relies on the expertise of an international, multidisciplinary thematic network (RTPi-Sea’ties), jointly led by the Ocean & Climate Platform and the French National Center of Scientific Research (CNRS). Bringing together experts from diverse fields including oceanography, physics, history, geography, economics, sociology, law, ecology, and biology, its initial efforts have resulted in the production of a synthesis of scientific literature on coastal adaptation strategies.

About the Scientific Synthesis

The publication ‘Designing Coastal Adaptation Strategies to Address Sea Level Rise’ is a synthesis of scientific literature that presents four archetypes of adaptation strategies for addressing sea level rise. These strategies are analyzed based on their governance modalities and the complexity of their implementation. This synthesis was co-authored by scientists from the RTPi-Sea’ties network, jointly led by the Ocean & Climate Platform (OCP) and CNRS, and it was published in the ‘Frontiers in Marine Science’ journal’s Ocean Solutions section in November 2021.

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Sharing experiences

Many solutions have already been deployed across the globe and can be inspirational for other territories. Sea’ties strives to facilitate the exchange of best practices among peers and leverage collective intelligence to identify the fundamental prerequisites for sustainable adaptation.

Acknowledging the vital need to bridge the gap between knowledge and decision-making, this initiative proposes a forum for collaborative discussions between elected officials, city planners, scientists, private sector representatives, and civil society through the organisation of workshops, the creation of digestible content such as videos and reports, and the development of interactive tools, including a Map of Solutions.

Regional Workshops

Between 2021 and 2023, five workshops were organized in five regions around the world: Northern Europe, the Mediterranean, North America, West Africa, and the Pacific. In total, approximately 230 practitioners, including elected officials, scientists, local planners, representatives of civil society and the private sector, along with development agencies and international donors, came together to identify local challenges, share their experiences, and collaboratively develop recommendations for better preparing their territories for adaptation.

Regional Reports

Drawing on the outcomes of each workshop and individual interviews, the regional reports offer an overview of current obstacles and specific needs that must be addressed to implement adaptation strategies. Targeted at decision-makers, city planners, and residents seeking transformative change along their coastlines, these reports illuminate leading practices to inspire action.

Thematic focus

Confronted with the urgent need to reshape the future of coastal cities facing rising sea levels, Sea’ties conducts international workshops focused on critical adaptation themes. The policy brief, “Nature-Based Solutions for Resilient Coastal Cities,” was developed from an initial workshop dedicated to exploring nature-based adaptation strategies. Targeted at policymakers and stakeholders engaged in coastal resilience efforts, this brief presents five key policy recommendations, outlines strategies to overcome common barriers to implementing nature-based solutions in coastal adaptation, and highlights examples and resources to inspire and guide decision-makers in their choices.

The Map of Solutions

Explore the Map of Solutions and discover the adaptation initiatives to sea level rise already implemented in many coastal cities and territories worldwide!

Are you involved in the adaptation of coastal cities and territories to rising sea levels?

Share your experience to highlight the diversity of existing solutions deployed across the world and promote your actions!

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Supporting political action in favour of adaptation

While local decision-makers can leverage multiple tools and frameworks to initiate the adaptation of their territories, the ambition of their actions depends on the mobilisation and support of the international community on these issues. Sea’ties aims to enhance the integration of adaptation priorities into both national and international public policies by providing recommendations based on concrete experiences and scientific knowledge.

This advocacy mission aligns with the Ocean & Climate Platform’s role within the United Nations Framework Convention on Climate Change (UNFCCC) as an observer organisation.

The Sea'ties Declaration
At the One Ocean Summit, mayors urge international action on sea level rise.
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About the Declaration

Initiated by the OCP, the French Government and the City of Brest, with the support of ICLEI and the “Race to Resilience” campaign, the Sea’ties Declaration commits more than 40 mayors, governors, and city networks across the world to the challenges of adapting coastal cities and territories to sea level rise. The Declaration is a call to accelerate adaptation action addressed to the international community, and highlights four priority strategies:

  1. Mobilising science and observation systems, 
  2. Integrating societal issues within adaptation plans, 
  3. Fostering adaptive and hybrid solutions, 
  4. Increasing public funding and private investments for adaptation to sea level rise

Additional resources

Policy brief

Adapting Coastal Cities and Territories to Sea Level Rise

White Paper

Investment Protocol: Unlocking Financial Flows for Coastal Adaptation to Climate Change and Resilience Building

Contact

Théophile Bongarts-Lebbe

Project Manager – Coastal Adaptation and Climate Change

tbongarts@ocean-climate.org

Partners

Financial support

endorsement