Skip to content

Interview with Tirza Meyer: The Ocean – a contemporary history

A yellow sea cucumber on the seabed
A “gummy squirrel” sea cucumber, Psychropotes longicauda, living at a depth of 5,000 meters. Image courtesy of the DeepCCZ expedition/NOAA
Tirza Meyer is a contemporary historian and a postdoctoral researcher at the Department of Philosophy and History, who has come to devote her work to the ocean. After studying how the United Nations Convention on the Law of the Sea was negotiated, she is now dedicating her time to the question of how we have discovered, and continue to discover, life in the ocean, a very contemporary development.

To an historian, the contemporary period begins at the end of the second world war and – at least for Tirza Meyer – stretches some distance into the future. In her own academic history, the law of the sea has played an important role. It started when her supervisor at NTNU in Trondheim, Norway invited her to work on a project about deep-sea mining. That led to a dissertation about the role of Elisabeth Mann Borgese in making the United Nations Convention on the Law of the Sea,UNCLOS, a reality and creating regulations for using the resources of the sea.

A woman in a black blouse and
Tirza Meyer

“After the war there existed an international community with the United Nations, the human rights, and ideas of internationalism. By giving resources for everyone to share the idea was that the world could become more just.”

Last year, Tirza Meyers published a book about Elisabeth Mann Borgese’s years-long work with UNCLOS. Her own work has also resulted in her being a member of a reference group for the Norwegian delegation to the International Seabed Authority, ISA, an autonomous international organization, through which states parties to UNCLOS organize and control all mineral-resources-related activities in the Area for the benefit of humankind as a whole.

”Based on my knowledge of the development of the convention on the law of the sea, I can comment on what may happen in the future. In my field, my colleagues and Istudy the past to understand how things are developing and how they may continue to develop in the future.”

Marine protected areas and mining that threatens biodiversity

As recent as in March 2023 negotiations were concluded on the Treaty of the High Seas to protect the ocean, tackle environmental degradation, fight climate change, and prevent biodiversity loss, an addendum to UNCLOS in an area that wasn’t well known during the 1970s and 1980s when the convention was negotiated. When ratified by at least 60 states the addendum will enter into force, enabling large marine protected areas on the high seas and require assessing the impact of economic activities on high seas biodiversity.

A group of people posing for a photoshoot
Tirza Meyer (in white and green) with colleges at the Institute for Marine and Antarctic Studies, University of Tasmania. Photo: Hanne Nielsen

This year the ISA wants to reach a contract for the exploitation of minerals from the seabed. So far deep-sea mining has only been done as small-scale trials but the new contract can lead to large-scale seabed mining, something that is problematic in many ways and that is portrayed as a necessity since there will be a large future demand for minerals, not least for the green transition.

“I believe many biologists who work with the deep sea agree that we first need to gather information before mining, that risks devastating large areas, should take place. It is a very inflammatory issue, as a historian I can only comment on how we ended up where we are today.”

Costly research at enormous depths

Tirza Meyer has turned her eyes to the contemporary history of deep-sea research and she focuses on the abyssal and hadal zones, the part of the ocean – most of it – that is deeper than 4 000 meters and that has been named after the Greek word for bottomless and the Greek mythological underworld. She recently returned from a research trip to Australia.

“The research institute in Perth that I visited had been able to have access to a research vessel and a submersible thanks to funding from a wealthy individual. That is both interesting and problematic. One can speculate about how their research had been affected if he had decided to use his money on something else. A lot of the research is also funded by companies that want to mine minerals and that need knowledge about the seabed.”

In Tasmania, she met researchers working with under-ice observation. They work in inaccessible areas since it isn’t possible to drill through the polar ice and the instruments you send down under the ice tend to disappear. But there are great opportunities for discoveries. In 2021 researchers discovered the largest colony of fish nests in the world under the polar ice, with approximately 60 million fishes of the species Jonah’s icefish (Neopagetopsis ionah) over an area of 240 square kilometres.

”They discovered the area with a remotely operated underwater vehicle or ROV. I spoke with one of the people who made the discovery at a conference in London ”The Challenger Society Conference”. It’s a special world where you talk about how many species you have under your belt, that is how many new species you have discovered.”

New knowledge changes our view of the deep sea

The development has been fast and new species are discovered every time you send an instrument into the deep. Our idea of what the deep sea is has changed as we have gotten access to new technology that has changed our view of an area that we didn’t use to have access to.

illustration of a diver and a remotely operated underwater vehicle
Diver and remotely operated underwater vehicle. Illustration: Reviel Meyer

”Earlier a kind of dredge was used to collect fish from the deep sea. Then you didn’t know from exactly what depth the fishes came and they were also harmed when they were raised the the deep. One example of this is the fish barreleyes (Macropinna microstoma) which has a transparent head filled with liquid. The first description and drawing of the fish are from 1939 and they show a fish with a head that has collapsed in the lower surface pressure. It wasn’t until the early 2000s that a camera on an ROV revealed what it looked like in its natural habitat.”

Another example that shows how we are in the middle of an era of discoveries and new knowledge is that the first map of the Mid-Atlantic ridge was done as late as 1953 and that it’s not until the present day that we can map the seabed and measure the depth of the sea, using satellites and modern bathymetry. In the 1970s we also discovered hydrothermal vents, openings in the seabed with hot water mixed with minerals, and bacteria feeding on minerals through chemosynthesis, an alternative to photosynthesis, that was unknown until then.

”Apart from deep-sea research being very expensive and much remaining to be discovered, it’s also an international endeavour. I hope that we can learn more about the ocean together, without devastating it.”



Working as a doctoral student in the Nuclearwaters-Project (ERC Consolidator Grant, PI Per Högselius), I focus on the nuclear history of Eastern Europe, especially on the territory of the former Soviet Union and its successor states. Furthermore, I investigate expert cultures in nuclear discourses, with a special interest in water-related issues in nuclear power plant decision-making. In addition, I am intrigued by the entanglement of the commercial, scientific and political interests concerning nuclear technologies, with its sometimes harsh consequences on human societies and the environment. Recently this interest has extended to energy systems as a whole in Eastern Europe, including fossil fuels and renewables. Questions of transition within international energy systems in the face of the climate crisis and recent political developments become more important, as my work progresses.