WAMPUM: An Indigenous-Designed Path to Sea Level Rise Adaptation

Northeastern and mid-Atlantic tribal nations lived sustainably on the coastline for centuries before colonization. How can their experiences inform strategies for sea level rise adaptation?

European Copernicus Services to Inform on Sea-Level Rise Adaptation: Current Status and Perspectives

Sea-level rise is a direct consequence of climate change. Primarily due to ocean thermal expansion and transfer from land ice (glaciers, ice sheets) to the ocean, sea-level rise is therefore an integrated indicator of climate change. Coastal zones and communities are expected to be increasingly threatened by sea level changes, with various adverse and widespread impacts. The European Union’s Earth Observation Programmed, Copernicus, monitors our planet and its environment, for the ultimate benefit of society. This includes the monitoring of sea level changes and the provision of ancillary fields needed to assess sea-level rise coastal risks, to guide adaptation and to support related policies and directives. Copernicus is organized with a space component, including dedicated Earth Observation satellites (Sentinel missions), and services, which transform the wealth of satellite, in situ and integrated numerical model information into added-value datasets and information usable by scientists, managers and decision-makers, and the wider public. Here, an overview of the Copernicus products and services to inform on sea level rise adaptation is provided. Perspectives from Copernicus services on future evolutions to better inform on coastal sea level rise, associated risks, and support adaptation are also discussed.

Collective action problems and governance barriers to sea-level rise adaptation in San Francisco Bay

This paper translates Ostrom’s “diagnostic approach” for social-ecological systems to identify the collective action problems and core governance barriers for sea-level rise adaptation in the San Francisco Bay Area. The diagnostic approach considers variables related to the resource system, the resource units, the users, and the governance system. Coupled ecological-infrastructure models identify two core collective action problems: vulnerability interdependency and adaptation interdependency. Qualitative social science case study methods identify the key structural governance and behavioral barriers to cooperation and ongoing activities to address them. The diagnostic approach is potentially applicable to any coastal regions that are vulnerable to sea-level rise and also other climate adaptation issues where vulnerability and adaptation interdependencies require overcoming governance challenges to collective action.

Economic evaluation of sea-level rise adaptation strongly influenced by hydrodynamic feedbacks

Coastal communities rely on levees and seawalls as critical protection against sea-level rise; in the United States alone, $300 billion in shoreline armoring costs are forecast by 2100. However, despite the local flood risk reduction benefits, these structures can exacerbate flooding and associated damages along other parts of the shoreline—particularly in coastal bays and estuaries, where nearly 500 million people globally are at risk from sea-level rise. The magnitude and spatial distribution of the economic impact of this dynamic, however, are poorly understood. Here we combine hydrodynamic and economic models to assess the extent of both local and regional flooding and damages expected from a range of shoreline protection and sea-level rise scenarios in San Francisco Bay, California. We find that protection of individual shoreline segments (5 to 75 km) can increase flooding in other areas by as much as 36 million m3 and damages by $723 million for a single flood event and in some cases can even cause regional flood damages that exceed the local damages prevented from protection. We also demonstrate that strategic flooding of certain shoreline segments, such as those with gradually sloping baylands and space for water storage, can help alleviate flooding and damages along other stretches of the coastline. By matching the scale of the economic assessment to the scale of the threat, we reveal the previously uncounted costs associated with uncoordinated adaptation actions and demonstrate that a regional planning perspective is essential for reducing shared risk and wisely spending adaptation resources in coastal bays.

Coastal Structures as Beach Erosion Control and Sea Level Rise Adaptation in Malaysia: A Review

The shoreline of Malaysia is exposed to threats of coastal erosion and a rise of sea level. The National Coastal Erosion Study, 2015 reported that 15% of an 8840 km shoreline is currently eroding, where one-third of those falls under the critical and significant categories that require structural protection. The Study of Sea Level Rise in Malaysia, 2017 presented a sea-level increase of 0.67–0.74 mm on average yearly. This study reviewed selected coastal protection structures along the shoreline of Malaysia as an erosion control and sea-level rise adaptation based on coastal management strategies. Hard structures such as rock revetment and breakwater are commonly used as erosion protection systems in the “hold the line” strategy. Increased platform level of seawalls and earth bunds, considered as an “adaptation” approach, are effective in erosion protection and are adaptive to sea-level rise. Mangrove replanting is suitable as a “limited intervention” approach in minimizing the long-term impact of both threats. However, offshore breakwater, groyne, and geotextile tubes are solely for protection purposes and are not as effective for sea-level rise adaptation. As the sea level is continuously increasing, their function as coastal protection will also become less effective. In summary, this comprehensive review on coastal protection in Malaysia will benefit the related agencies on the future assessment.

Science–policy dimensions of research on climate change and conflict

A large body of research now indicates that climate likely matters for conflict. This climate–conflict scholarship, however, has involved divergent findings, sometimes strident disagreement, and resulting limits to the usability of the scholarship for policymakers and practitioners. This viewpoint essay draws from recent expert assessments of climate–conflict linkages to position the research field among climate change research and assessment more broadly. We explore potential insights from the climate realm. As is often the case for climate change research, science–society dynamics are inherent in scholarship on climate and conflict. They contribute to contestation about the state of knowledge, the best ways to characterize it, and its implications for societal choices and investments. Our critique is grounded in the literature evaluating policy-relevant climate change assessment across diverse disciplines, from sea-level-rise adaptation science to energy-system modeling. Through comparisons with such fields, this perspective article considers several implications for climate–conflict knowledge production. We examine, in particular, the necessity of integrating diverse lines of evidence to understand the risks of responding to societally relevant uncertainties and priorities, and of encouraging interactions among researchers, practitioners, and policymakers. The experiences of other climate change disciplines can provide inspiration for potential directions for climate, conflict, and security scholarship. They include risk framings in integrating underlying evidence, through to options for supporting the interactions among researchers and societies.

Attitudes about Sea Level Rise Adaptation: Comparison between Miami-Dade and the Rest of Florida

Sea-level rise and climate change are important issues in science, politics, and communities. Sea-level rise is a particularly contentious topic in Florida, where expected impacts include coastal flooding, shrinking shorelines, and saltwater intrusion. It is unclear what Floridians think about sea-level rise and the ways in which the state can adapt to these impacts. This 5-page fact sheet written by Bailey Emrick, Misti Sharp, and Xiang Bi and published by the UF/IFAS Food and Resource Economics Department summarizes findings from two recent surveys examining attitudes of Miami residents and those of residents of the rest of Florida about sea-level rise and potential adaptations to it

Toward improved coastal sediment management through coordination in California

Sediment is an essential component of contemporary coastal and marine management in California. For decades, multiple coastal sediment management organizations have facilitated and coordinated regional sediment management (RSM) as an approach, and more recently, are increasingly focused on the state’s sea level rise adaptation efforts. From the perspective of representatives and members of some of these organizations, this paper describes challenges of RSM in the areas of organizational capacity and coordination. It also characterizes ways in which organizations are taking leadership and action in overcoming these constraints to fulfill their commitment to improved coastal sediment management.