This article is more than 1 year old

This article is more than 1 year old

This article is more than 1 year old

Rapidly melting sea ice in Greenland has presented an unusual hazard for research teams retrieving their oceanographic moorings and weather station equipment.

A photo, taken by Steffen Olsen from the Centre for Ocean and Ice at the Danish Meteorological Institute on 13 June, showed sled dogs wading through water ankle-deep on top of a melting ice sheet in the country’s north-west. In the startling image, it seems as though the dogs are walking on water.

The photo, taken in the Inglefield Bredning fjord, depicted water on top of what Olsen said was an ice sheet 1.2 metres thick.

His colleague at the institute, Rasmus Tonboe, tweeted that the “rapid melt and sea ice with low permeability and few cracks leaves the melt water on top”.

Olsen tweeted that his team relied on traditional knowledge from local hunters and their dogs as they searched for dry spots on the ice. The team also used satellite images to plan their trip. He said the photos documented an “unusual day” and that the image was “more symbolic than scientific to many”.

Ruth Mottram, climate scientist at the Danish Meteorological Institute, told the Guardian: “This year the expedition to retrieve the instruments – by dog-sled, still the most practical way to get around in this region at this time of year – ran into a lot of standing water on the sea ice. The ice here forms pretty reliably every winter and is very thick, which means that there are relatively few fractures for meltwater to drain through. Last week saw the onset of very warm conditions in Greenland and in fact much of the rest of the Arctic, driven by warmer air moving up from the south.”

Profile Greenland Show Hide About 80% of the world's largest island is covered in ice. Inuit people first inhabited it by moving from present-day Canada 4,000-5,000 years ago. It was named by Erik the Red when he led a fleet of 25 ships from Iceland to colonise it in 985 AD. Population: 56,000 - 90% of whom live in 16 towns. Size: 836,000 sq miles (2.16m sq km) - roughly the same size as Great Britain, France, Germany, Spain, Italy, Austria, Switzerland and Belgium combined. Official language: Greenlandic - closely related to languages spoken by Inuit in Canada and Alaska.

National dish: Meat soup called suaasat which normally contains seal, whale, reindeer or seabirds.

Life expectancy: 72.9 years

Head of state: Queen Margrethe II of Denmark

Premier: Kim Kielsen

Capital city: Nuuk (population 18,000)

National anthem: Nunarput Utoqqarsuanngoravit, adopted in 1916. The first verse translates as: “Our country, which has become so old, your head is all covered with white hair. Always held us, your children, in your bosom, and gave us the riches of your coasts.”

Religion: Christianity was introduced to the island around 1000 by Erik the Red’s son Leif Eriksson.

Government: Denmark granted the island limited self-government in 1979, 26 years after it was incorporated into the country by the Danish constitution. Further powers were devolved in 2008. Economic self-sufficiency has been a stumbling block to the island gaining full independence.

EU membership: Greenland was a member of the European Union as part of Denmark from 1973 to 1985. It withdrew in 1985 after 53% of people voted to leave in a referendum called following disputes over fishing rights.

Military: There is no military force. Defence and foreign policy remain in the hands of the Danes.

Airports: 14. The first three were built in the 1940s and 50s by the US, which was handed the defence and control of Greenland while Denmark was under Nazi occupation.

Famous Greenlanders: Jesper Grønkjær, played football for Ajax, Chelsea, Atlético Madrid; Rasmus Lerdorf, co-authored the PHP programming language; Aleqa Hammond, the country’s first female prime minister. Photograph: EIL Austria / Nasa / Alamy/www.alamy.com

She said these conditions had let to “a lot of melting ice, on the glaciers and ice sheet, and on the still-existing sea ice”. The DMI weather station nearby at Qaanaaq airport registered a high of 17.3C (63.1F) last Wednesday and 15C (59F) last Thursday, which is high for northern Greenland, even in summer. Mottram cautioned that the numbers were provisional and would be subject to checking.

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In other areas, meltwater drains away through fractures in the ice to the rocks far below, and so does not leave standing water on the surface. But because the ice in the region is thick and fracture-free, the water pools above the ice, giving rise to the dramatic photograph.

Melting events such as the one pictured would normally not happen until later in the summer, in late June or July. Mottram said it was too soon to say what role global warming had played, because although these temperatures were unusual, the conditions were not unprecedented and “still a weather-driven extreme event, so it’s hard to pin it down to climate change alone”.

In general, however, she said: “Our climate model simulations expect there to be a general decline in the length of the sea ice season around Greenland, [but] how fast and how much is very much dependent on how much global temperature rises.”

She said forecasts indicated that the warm conditions over Greenland would persist at least for another few days, so the dog-sled teams will face further tough going.

Facebook Twitter Pinterest Greenland Melt Extent 2019, shows ice melt in Greenland 2019 versus 1981-2010 median. Photograph: National Snow and Ice Data Center (US)

The photograph emerged amid concerning temperature data from Greenland. On Saturday, the Washington Post’s Capital Weather Gang said European weather models showed that temperatures over parts of Greenland peaked at 22.2C (40F) above normal last Wednesday, the day before the photo was taken.

Above-average temperatures over nearly all of the Arctic ocean and Greenland during May have led to an early ice retreat, with the second-lowest extent of ice in the 40-year satellite record being registered, according to the US National Snow and Ice Data Centre.

The centre said that Arctic sea ice for May was 12m square kilometres (4.7m square miles), 1.13m square kilometres below the 1981-2010 average.

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Air temperatures at the end of May along the western Greenland coast were as much as 7C above the 1981–2010 reference average for the month, the centre said. It also recorded Arctic ocean temperatures of 2-4C above the average.

“The melting is big and early,” Jason Box, an ice climatologist at the Geological Survey of Denmark and Greenland, told the Washington Post.

At a local level, the sea ice melt provides significant problems for communities in Greenland, who rely on it for transport, hunting and fishing.

“Extreme events, here flooding of the ice by abrupt onset of surface melt, call for an increased predictive capacity in the Arctic,” said Olsen.

• This article was amended on 18 June 2019. Temperatures in Greenland last Wednesday are thought to have peaked at 40F above normal. This figure was incorrectly converted to 4.4C, rather than 22C, above normal.