Coastal regions under threat from sea-level rise need to tackle the immediate threats of human-led and other non-climatic changes, according to a new analysis. It's an even more pressing concern than possible climate change sea rises because those changes are already happening.
A team of 27 scientists led by Dr Sally Brown at the University of Southampton reviewed 24 years of Intergovernmental Panel on Climate Change (IPCC) assessments, focusing on climate change and sea-level rise impacts in the coastal zone, and examined ways of how to better manage and cope with climate change.
They found that to better understand climate change and its impacts, scientists need to adopt an integrated approach into how coasts are changing. This involves recognizing other causes of change, such as population growth, economic development and changes in biodiversity.
"Over the last two and half decades, our scientific understanding of climate change and sea-level rise, and how it will affect coastal zones has greatly increased. We now recognize that we need to analyze all parts of our human and natural environments to understand how climate change will affect the world," says Brown.
The scientists also acknowledged that long-term adaptation to climate change can greatly reduce impacts, but further research and evaluation is required to realize the potential of adaptation.
"Many parts of the coast can, with forward planning, adapt to sea-level rise, but we need to better understand environments that will struggle to adapt, such as developing countries with large low-lying river deltas sensitive to salinization, or coral reefs and particularly small, remote islands or poorer communities," said Brown.
For example, in the Maldives, many small, remote low-lying islands are at risk from climate change and will struggle to adapt. But around the densely populated capital city and airport, adaptation has already occurred as land claim is a common practice in order to relive population pressure. Sea-level rise has already been considered into newly claimed land. Thus in decades to come, potential climate change impacts, such as flooding, will be reduced for this island, benefiting both the local population and economy.
Dr. Jochen Hinkel from Global Climate Forum in Germany, who is a co-author of this paper and a Lead Author of the coastal chapter for the 2014 IPCC Assessment Report added, "The IPCC has done a great job in bringing together knowledge on climate change, sea-level rise and is potential impacts but now needs to complement this work with a solution-oriented perspective focusing on overcoming barriers to adaptation, mobilising resources, empowering people and discovering opportunities for strengthening coastal resilience in the context of both climate change as well as existing coastal challenges and other issues."
This new research in Nature Climate Change will help in the understanding of the impacts of climate change and how to reduce impacts via adaptation. Its multi-disciplinary approach could be useful if future IPCC assessment reports are commissioned.