Svalbard Global Seed Vault: Inside the Arctic Backup for World Crops

High on a hillside above Longyearbyen airport in Svalbard, a narrow concrete wedge sticks out of the Arctic permafrost. Behind it, more than 100 m inside the mountain, the Svalbard Global Seed Vault holds over 1.3 million seed samples from genebanks all over the world. It is the world's backup copy of crop diversity, from staple grains to beans.

Why the seed vault is in Svalbard

The vault was built by the Norwegian government, which paid the full cost of about 45 million kroner (US$8.8 million in 2008). Construction started on 19 June 2006, the first seeds arrived in January 2008, and the vault officially opened on 26 February 2008.

Svalbard was chosen for good reasons. The archipelago lies far from tectonic activity. The rock around the vault is permafrost that stays at about −3 to −4 °C even without power. At 130 m above sea level, the entrance should stay dry even if the polar ice caps melt. Longyearbyen also has an airport and regular flights from mainland Norway, so depositors can deliver boxes of seeds easily.

Inside the mountain: tunnel, halls and cooling

A long access tunnel runs from the entrance into the mountain to three storage halls, each about 9.5 by 27 m, beneath 40–60 m of solid rock. Each hall can hold about 1.5 million seed samples, giving a total capacity of 4.5 million, and so far only one hall is in use. A cooling system keeps the seed rooms at −18 °C, and backup generators cover any power cut.

The vault was designed with architect Peter W. Søderman. Its entrance carries Perpetual Repercussion, an artwork by Norwegian artist Dyveke Sanne made of reflective steel, mirrors and prisms. In the long polar night, about 200 fibre-optic cables light it up, so the portal glows turquoise and white against the snow.

In October 2016, unusually warm weather and heavy rain sent water about 15 m into the entrance tunnel, where it froze. The seeds were never at risk. Norway's building agency, Statsbygg, rebuilt and waterproofed the tunnel and upgraded the technical systems, finishing the work in 2019.

How the "black box" system works

The vault works like a bank's safe-deposit room. Genebanks send duplicates of seeds they already conserve, sealed in labelled boxes, and the storage is free. Each depositor keeps ownership of its seeds, and nobody else opens the boxes. Researchers and plant breeders do not request seeds from Svalbard. They go to the depositing genebank, which controls its own material under the terms of the International Treaty on Plant Genetic Resources.

The vault is run by a partnership of Norway's Ministry of Agriculture and Food, the Crop Trust and the Nordic Genetic Resource Centre (NordGen), which handles daily operations. Its value lies in protecting collections against loss through natural disaster, war, policy changes or simple mismanagement.

The first withdrawal: seeds from war-torn Syria

The vault proved its worth during the Syrian civil war. The International Center for Agricultural Research in the Dry Areas (ICARDA) could no longer run its genebank at Tel Hadya, near Aleppo. In 2015 it withdrew part of its backup collection from Svalbard to grow new seed, followed by a larger withdrawal in 2017. The seeds were regenerated in Lebanon and Morocco, and fresh duplicates were then sent back to the vault.

Holdings reached about 1.36 million accessions by mid-2025. An accession is a distinct sample of a variety or population, so many samples can belong to the same crop species. Visitors to Longyearbyen can see the illuminated entrance above the airport. For more about the region, read Svalbard Global Seed Vault: What the Arctic Backup Actually Does, see other infrastructure designed for polar conditions, or learn more in why polar temperature measurements need context.

More from Norway: The Arctic Light: Lofoten’s Long Spring Twilight and Ice Driving in Western Norway: Tracks Across a Frozen Surface.

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