By 2100, Damaged Corals May Let Waves Twice As Tall As Today’s Reach Coasts

March 06, 2018 |

This article was originally published on ScienceNews.

“A complex coral reef full of nooks and crannies is a coastline’s best defense against large ocean waves. But coral die-offs over the next century could allow taller waves to penetrate the corals’ defenses, simulations suggest. A new study finds that at some Pacific Island sites, waves reaching the shore could be more than twice as high as today’s by 2100.

The rough, complex structures of coral reefs dissipate wave energy through friction, calming waves before they reach the shore. As corals die due to warming oceans (SN: 2/3/18, p. 16), the overall complexity of the reef also diminishes, leaving a coast potentially more exposed. At the same time, rising sea levels due to climate change increasingly threaten low-lying coastal communities with inundation and beach erosion — and stressed corals may not be able to grow vertically fast enough to match the pace of sea level rise. That could also make them a less effective barrier.

…Under those conditions, the average back-reef wave heights at the four sites would be 2.4 times as high in 2100 as today, the team reports February 28 in Science Advances. That change would be largely due to the decrease in coral reef complexity rather than rising sea levels, the simulations suggest…”

Read on at: ScienceNews.

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Introduction from Carl Obst (2017)

Victor Hugo once wrote that “Nothing is so powerful as an idea whose time has come”. Recognising the true value of natural capital, is one such idea. Across private and public sectors, across disciplines, and around the world, initiatives to advance and develop natural capital thinking have emerged rapidly over the past 10 years.

In a blizzard of acronyms, we have the NCC, SEEA, WAVES, IIRC, KIP-INCA, A4S, GRI, EO4EA – among many others. Are they the same, are they competing, are they useful? To both insiders and outsiders this range of initiatives is confusing at best. At worst, it leads to a lack of engagement, avoidance and misunderstanding.

The reality is that, while differences among these various initiatives do exist, they have all been motivated by a common understanding of the reality that we are losing our stocks of natural capital – and that this matters.

While each initiative may have different origins, some differing objectives, and may reflect variations in technique and method, there is much common ground. Indeed, to engage the broader community in tackling the natural capital challenges we collectively face, we cannot afford to focus on distinctions. Instead, we must look to build on the overlaps and seek to build a common language that will enable the exchange of ideas and ongoing innovation.

It is in this spirit of collaboration that the Natural Capital Coalition, together with the IDEEA Group and supported by over 20 organisations, launches this statement on Combining Forces on Natural Capital.

It is especially relevant that this statement of collaboration is launched at the World Forum on Natural Capital, where leading voices in the movement gather every two years, to share best practice, enduring challenges and build further collaborations.

While progress to date has largely taken place in small pockets, in order to move forward we need to ramp up our efforts and move beyond talking with supporters and “the converted”.

For this, we need leaders who can establish spaces for dialogue and development, and who can ensure that technical debates do not form a barrier to progress, that we take full advantage of the diversity of skills and experience already engaged, and that the big picture is always kept in mind.

I encourage you to take the opportunity to read the statement, to share it within your organisations, to sign on, and to join us as we move towards a better understanding and appreciation of the complex and beautiful world in which we live.

Carl Obst is Director of the Institute for the Development of Environmental-Economic Accounting (IDEEA Group), and Lead Author of the United Nation’s System of Environmental-Economic Accounting (UN SEEA).