12 Jul 2018 - The ocean contributes $1.5 trillion annually to the global economy and assures the livelihood of 10-12 percent of the world’s population. But there’s another reason to protect marine ecosystems—they’re crucial for curbing climate change.
2018: A Year for the Ocean and Climate Action
This year is shaping up to be a critical one for ocean action. The 53 member countries of the Commonwealth adopted the Commonwealth Blue Charter on Ocean Action earlier this year, a plan to protect coral reefs, restore mangroves and remove plastic pollution, among other actions.
Ocean conservation was a centerpiece of the G7 meeting resulting in the ‘Charlevoix Blueprint for Healthy Oceans, Seas and Resilient Communities’ which commits the G7 to supporting better adaptation planning, emergency preparedness and recovery; support innovative financing for coastal resilience; and launch a joint G7 initiative to deploy Earth observation technologies and related applications to scale up capacities for integrated coastal zone management.
In addition, the leaders of Canada, France, Germany, Italy, the UK and the European Union agreed to tackle ocean plastic in the ‘Ocean Plastics Charter.’ Such action lays important groundwork for substantial negotiations for the first ever international treaty for conservation of the high seas to begin in September. The negotiations will last 2 years, culminating in 2020. The high seas cover nearly half the planet and are filled with marine life, from fish to plankton that are crucial to generating oxygen and regulating the global climate.
Approximately 40 percent of all CO2 emissions from burning fossil fuels is absorbed by the ocean. The new treaty will be negotiated under the UN Convention on the Law of the Sea, joining other agreements that govern sea bed mining and highly migratory fish stocks. It has been dubbed the “Paris Agreement for the Ocean”, potentially enabling the creation of large marine protected areas in the high seas that have long been called for as crucial to curbing the decline of global fish stocks and other marine life.
Speaking of the Paris Agreement, this year is also a turning point for international climate action. The first stocktake of progress under the Paris Agreement on climate change, known as the Talanoa Dialogue, is currently underway, and is expected to highlight tangible opportunities for countries to further advance climate action. Countries are also expected to agree later this year on a rulebook for implementing the Paris Agreement.
The ocean and coastal ecosystems provide an untapped, nature-based climate solution that needs to be part of both conversations.
The Ocean as a Climate Solution
“Blue carbon” ecosystems such as mangroves, seagrass meadows and kelp forests are 10 times more effective at sequestering carbon dioxide on a per area basis per year than boreal, temperate, or tropical forests and about twice as effective at storing carbon in their soil and biomass. They also play a crucial role in protecting coastal infrastructure and communities from climate impacts, including extreme weather events.
- Mangroves are found in 123 countries and territories and are estimated to cover more than 150,000 square kilometres globally. Mangroves buffer coastal communities from wind and waves, acting as a frontline defense against storms and sea level rise.
- If the world halted just half of annual coastal wetlands loss, it would reduce emissions by 0.23 gigatonnes, Spain’s total annual emissions in 2013.
- Restoring coastal wetlands to their 1990 extent would increase annual carbon sequestration by 160 megatonnes a year, equivalent to offsetting the burning of 77.4 million tonnes of coal.
National Climate Commitments: An Opportunity to Advance Action on Climate and the Ocean
Commitments made by countries to advance climate action in line with the goals of the Paris Agreement are a vehicle to advance action on both agendas. Known as Nationally Determined Contributions (NDCs), the ocean and coastal ecosystems are currently underrepresented in these commitments.
There are a number of policy options for incorporating blue carbon ecosystems into NDCs. These include:
- Creating or protecting blue carbon ecosystems (including through Marine Protected Areas). This includes establishing buffer zones to reduce impacts from adjacent land-use and allowing mangroves to migrate inland in response to sea level rise.
- Reforesting or rehabilitating degraded blue carbon ecosystems.
- Introducing incentives to create new or protect existing blue carbon ecosystems on privately owned land, including through access to carbon markets.
- Ensuring the mitigation potential of blue carbon ecosystems is included in national greenhouse gas inventories.
Recognizing the Blue Carbon Economy
Of course, curbing climate change isn’t the only reason to invest in ocean and coastal ecosystem protection. Coastal ecosystems can also but the resilience of coastal communities to natural hazards—including storms (mangroves absorb the energy of storm-driven waves and wind), flooding, erosion and fire. Wetlands provide nurseries for the many species of fish that support economies and improve food security. And marine protected areas can also protect biodiversity.
Fighting climate change is just yet another benefit the ocean provides us. It’s time to start recognizing its protection as a climate change solution.