A rush is on to mine the deep seabed, with effects on ocean life that aren’t well understood

According to international law, the seabed belongs to everyone.

We don't understand the effects of deep sea mining
Photo by Alexandra Rose on Unsplash

Mining the ocean floor for submerged minerals is a little-known, experimental industry.


But soon it will take place on the deep seabed, which belongs to everyone, according to international law.

Seabed mining for valuable materials like copper, zinc and lithium already takes place within countries' marine territories. As soon as 2025, larger projects could start in international waters – areas more than 200 nautical miles from shore, beyond national jurisdictions.

We study ocean policy, marine resource management, international ocean governance and environmental regimes, and are researching political processes that govern deep seabed mining. Our main interests are the environmental impacts of seabed mining, ways of sharing marine resources equitably and the use of tools like marine protected areas to protect rare, vulnerable and fragile species and ecosystems.

Today countries are working together on rules for seabed mining. In our opinion, there is still time to develop a framework that will enable nations to share resources and prevent permanent damage to the deep sea. But that will happen only if countries are willing to cooperate and make sacrifices for the greater good.

An old treaty with a new purpose

Countries regulate seabed mining within their marine territories. Farther out, in areas beyond national jurisdiction, they cooperate through the Law of the Sea Convention, which has been ratified by 167 countries and the European Union, but not the U.S.

The treaty created the International Seabed Authority, headquartered in Jamaica, to manage seabed mining in international waters. This organization's workload is about to balloon.

Under the treaty, activities conducted in areas beyond national jurisdiction must be for "the benefit of mankind as a whole." These benefits could include economic profit, scientific research findings, specialized technology and recovery of historical objects. The convention calls on governments to share them fairly, with special attention to developing countries' interests and needs.

The United States was involved in negotiating the convention and signed it but has not ratified it, due to concerns that it puts too many limits on exploitation of deep sea resources. As a result, the U.S. is not bound by the treaty, although it follows most of its rules independently. Recent administrations, including those of Presidents Bill Clinton, George W. Bush and Barack Obama, sought to ratify the treaty, but failed to muster a two-thirds majority in the Senate to support it.

Map of world oceans showing where major metal deposits lie.Locations of three main types of marine mineral deposits: polymetallic nodules (blue); polymetallic or seafloor massive sulfides (orange); and cobalt-rich ferromanganese crusts (yellow). Miller et al., 2018, https://doi.org/10.3389/fmars.2017.00418, CC BY

Powering digital devices

Scientists and industry leaders have known that there are valuable minerals on the seafloor for over a century, but it hasn't been technologically or economically feasible to go after them until the past decade. Widespread growth of battery-driven technologies such as smartphones, computers, wind turbines and solar panels is changing this calculation as the world runs low on land-based deposits of copper, nickel, aluminum, manganese, zinc, lithium and cobalt.

These minerals are found in potato-shaped "nodules" on the seafloor, as well as in and around hydrothermal vents, seamounts and midocean ridges. Energy companies and their governments are also interested in extracting methane hydrates – frozen deposits of natural gas on the seafloor.

Scientists still have a lot to learn about these habitats and the species that live there. Research expeditions are continually discovering new species in deep-sea habitats.

Korea and China seek the most contracts

Mining the deep ocean requires permission from the International Seabed Authority. Exploration contracts provide the right to explore a specific part of the seabed for 15 years. As of mid-2020, 30 mining groups have signed exploration contracts, including governments, public-private partnerships, international consortiums and private multinational companies.

Two entities hold the most exploration contracts (three each): the government of Korea and the China Ocean Mineral Resources R&D Association, a state-owned company. Since the U.S. is not a member of the Law of the Sea treaty, it cannot apply for contracts. But U.S. companies are investing in others' projects. For example, the American defense company Lockheed Martin owns UK Seabed Resources, which holds two exploration contracts.

Once an exploration contract expires, as several have since 2015, mining companies must broker an exploitation contract with the International Seabed Authority to allow for commercial-scale extraction. The agency is working on rules for mining, which will shape individual contracts.

Unknown ecological impacts

Deep-sea mining technology is still in development but will probably include vacuuming nodules from the seafloor. Scraping and vacuuming the seafloor can destroy habitats and release plumes of sediment that blanket or choke filter-feeding species on the seafloor and fish swimming in the water column.

Mining also introduces noise, vibration and light pollution in a zone that normally is silent, still and dark. And depending on the type of mining taking place, it could lead to chemical leaks and spills.

Many deep-sea species are unique and found nowhere else. We agree with the scientific community and environmental advocates that it is critically important to analyze the potential effects of seabed mining thoroughly. Studies also should inform decision-makers about how to manage the process.

This is a key moment for the International Seabed Authority. It is currently writing the rules for environmental protection but doesn't have enough information about the deep ocean and the impacts of mining. Today the agency relies on seabed mining companies to report on and monitor themselves, and on academic researchers to provide baseline ecosystem data.

We believe that national governments acting through the International Seabed Authority should require more scientific research and monitoring, and better support the agency's efforts to analyze and act on that information. Such action would make it possible to slow the process down and make better decisions about when, where and how to mine the deep seabed.

Balancing risks and benefits

The race for deep-sea minerals is imminent. There are compelling arguments for mining the seabed, such as supporting the transition to renewable energy, which some companies assert will be a net gain for the environment. But balancing benefits and impacts will require proactive and thorough study before the industry takes off.

We also believe that the U.S. should ratify the Law of the Sea treaty so that it can help to lead on this issue. The oceans provide humans with food and oxygen and regulate Earth's climate. Choices being made now could affect them far into the future in ways that aren't yet understood.

Dr. Rachel Tiller, Senior Research Scientist with SINTEF Ocean, Norway, contributed to this article.The Conversation

Elizabeth M. De Santo, Associate Professor of Environmental Studies, Franklin & Marshall College; Elizabeth Mendenhall, Assistant Professor of Marine Affairs and Political Science, University of Rhode Island, and Elizabeth Nyman, Assistant Professor of Maritime Policy, Texas A&M University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

How New York's largest hospital system is predicting COVID-19 spikes

Northwell Health is using insights from website traffic to forecast COVID-19 hospitalizations two weeks in the future.

Credit: Getty Images
Sponsored by Northwell Health
  • The machine-learning algorithm works by analyzing the online behavior of visitors to the Northwell Health website and comparing that data to future COVID-19 hospitalizations.
  • The tool, which uses anonymized data, has so far predicted hospitalizations with an accuracy rate of 80 percent.
  • Machine-learning tools are helping health-care professionals worldwide better constrain and treat COVID-19.
Keep reading Show less

3,000-pound Triceratops skull unearthed in South Dakota

"You dream about these kinds of moments when you're a kid," said lead paleontologist David Schmidt.

Excavation of a triceratops skull in South Dakota.

Credit: David Schmidt / Westminster College
Surprising Science
  • The triceratops skull was first discovered in 2019, but was excavated over the summer of 2020.
  • It was discovered in the South Dakota Badlands, an area where the Triceratops roamed some 66 million years ago.
  • Studying dinosaurs helps scientists better understand the evolution of all life on Earth.
Keep reading Show less

What can Avicenna teach us about the mind-body problem?

The Persian polymath and philosopher of the Islamic Golden Age teaches us about self-awareness.

Photo by Andrew Spencer on Unsplash
Mind & Brain
Philosophers of the Islamic world enjoyed thought experiments.
Keep reading Show less

The incredible physics behind quantum computing

Can computers do calculations in multiple universes? Scientists are working on it. Step into the world of quantum computing.

Videos
  • While today's computers—referred to as classical computers—continue to become more and more powerful, there is a ceiling to their advancement due to the physical limits of the materials used to make them. Quantum computing allows physicists and researchers to exponentially increase computation power, harnessing potential parallel realities to do so.
  • Quantum computer chips are astoundingly small, about the size of a fingernail. Scientists have to not only build the computer itself but also the ultra-protected environment in which they operate. Total isolation is required to eliminate vibrations and other external influences on synchronized atoms; if the atoms become 'decoherent' the quantum computer cannot function.
  • "You need to create a very quiet, clean, cold environment for these chips to work in," says quantum computing expert Vern Brownell. The coldest temperature possible in physics is -273.15 degrees C. The rooms required for quantum computing are -273.14 degrees C, which is 150 times colder than outer space. It is complex and mind-boggling work, but the potential for computation that harnesses the power of parallel universes is worth the chase.
Keep reading Show less
Scroll down to load more…
Quantcast