Any Star Wars fan will recognize the remote ice planet Hoth, the location of some of the most iconic scenes from Episode V: The Empire Strikes Back, including the attack on the Rebel Alliance’s Echo Base by Imperial Walkers and Han Solo’s daring rescue of Luke Skywalker after his tauntaun was attacked by a wampa. Not many people, however, would know that those legendary scenes were filmed on a Norwegian ice cap called Hardangerjøkulen.
When the movie was filmed in 1980, the crew had to cope with subzero temperatures and freezing winds. However, nearly forty years later, the real-life Hoth is disappearing. According to a recent paper by Henning Akesson et al., published January 27, 2017 in The Cryosphere, the ice cap is extremely sensitive to small changes in temperature, and therefore vulnerable to climate change as global temperatures continue to increase.
Akesson explains in an article for ScienceDirect that due to increasing temperatures, it is feasible that Hardangerjøkulen could fully melt by 2100 if the trends continue. Once it melts, he and his team maintain that the ice cap will never return.
As the authors of the study explain, Hardangerjøkulen is located in southern Norway and measured 73 square kilometers (28 square miles) as of 2012. It is generally flat in the interior and has several steeper glaciers along the edge of the ice cap that drain the plateau. Two of these glaciers, Midtdalsbreen and Rembesdalsskaka, have retreated 150 meters (492 feet) and 1,386 meters (4,547 feet) respectively since 1982. Akesson et al. base their study of Hardangerjøkulen on modeling, as opposed to measurements or observations.
The team used a numerical ice flow model to produce a plausible ice cap history of Hardangerjøkulen thousands of years before the Little Ice Age. Using a modelled history of the ice cap, they examined the sensitivity to different parameters. They found that it is “exceptionally sensitive” to changes in temperature. These changes in temperature impact the ice cap’s surface mass balance, which is the gain and loss of ice from a glacier system.
The possible disappearance of Hardangerjøkulen has many implications, including impacting Norway’s tourism and hydropower industries. 99 percent of all power production in Norway comes from hydropower, which depends on glaciers’ water storage and seasonal water flow. Glaciers help contribute to water reservoirs used for the hydropower, and Norway itself contains nearly half of the reservoir capacity in Europe.
The ice cap is also a popular destination for hiking and glacier walking, as well as for Star Wars fans hoping to visit the location of Hoth scenes.
Local residents have remarked on noticeable differences in Hardangerjøkulen. Grete Hovelsrud, a senior researcher at the Nordland Research Institute and vice-president of the Norwegian Scientific Academy for Polar Research, told GlacierHub that the potential loss of Hardangerjøkulen is “very sad.” She added:
It is such a beautiful place. I skied across it last spring, and it really feels like being on top of the world.
Bottom line: The Norwegian glacier Hardangerjøkulen, known to Star Wars fans as the ice planet Hoth, is melting and may disappear by 2100.
Members of the EarthSky community - including scientists, as well as science and nature writers from across the globe - weigh in on what's important to them. Photo by Robert Spurlock.