A German research icebreaker carrying an international team of climate scientists was able to reach the North Pole on Wednesday largely due lighter-than-usual sea ice conditions in the High Arctic, underscoring the dramatic changes happening in the North.
The German icebreaker, RV Polarstern, with members of the Multidisciplinary drifting Observatory for the Study of Arctic Climate, or MOSAiC for short, followed a route to the north of Greenland – and through a region that, in the past, was densely covered with ice, including multiyear ice.
The journey from the northern Fram Strait to the North Pole only took less than a week, said a press release by the Alfred Wegener Institute’s Helmholtz Centre for Polar and Marine Research.
Polarstern Captain Thomas Wunderlich said he was very surprised to see how soft the ice had become even at 88° North this year, having thawed to the point of being “thin and porous.”
“Even after passing 88° North we mostly maintained a speed of 5-7 knots; I’ve never seen that so far north,” Wunderlich said in a statement.
“For this region, the current situation is historic. Normally it’s wise to avoid the region north of Greenland, because it’s home to the thicker and older ice, and virtually impassable. But now we’re finding extended stretches of open water, reaching nearly to the Pole.”
MOSAiC Expedition Leader Markus Rex said this year satellite imagery indicated that, even past 87° North, the ice cover was surprisingly loose.
“Up until 87° 30’ North, for the most part we passed through open water, in some cases stretching to the horizon,” Rex said in a statement.
“Based on the satellite imagery, at first we weren’t sure whether the loose ice cover was due to wind and currents, and were concerned that, if it was, a change in weather conditions could compact it again.”
Once in the region, however, they found that much of the sea ice truly had melted away, and hadn’t simply been broken up by the wind, Rex said.
This is yet another unique phenomenon that was observed and investigated by MOSAiC researchers, following the substantially accelerated melting rates in the Siberian sector in July, Rex said.
The Arctic sea ice extent reached a record low in July, shrinking to levels not seen since satellite observation of the region’s ice cover began in the late 1970s, according to MOSAiC.
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The mission sailed from the German port of Bremerhaven last September, anchored to an ice floe and conducted numerous experiments to study the impact of global warming on the Arctic until the summer heat broke apart the ice cover.
“For the final phase of MOSAiC, the expedition team will be focusing on the freezing phase: the last piece of the puzzle in terms of observing the Arctic ice throughout its annual cycle,” Rex said.
Moving on from the North Pole, the Polarstern will follow the Transpolar Drift a bit further towards the Siberian coast, until MOSAiC reaches 87° North.
“Depending on the ice conditions, however, we’ll also start looking for a suitable floe in the vicinity of the North Pole, so that we can start working on the ice as soon as possible,” Rex said.
The 100 crew and scientists from 20 nations, including Canada, are planning to return to Germany on Oct. 12.