Amundsen's South Pole: Chasing Shackleton's Ghost

Welcome to PodThis and The Discovery Hour. Today, we explore Roald Amundsen's 1911 journal of his perilous Antarctic polar plateau push. Polar historian Daniel joins us. Amundsen's survival hinged entirely on blind navigation against total geographic isolation.

How did a team of explorers, blinded by gales and battered by brutal terrain, navigate a featureless ice plateau to definitively prove they had marched further south than any humans in history?

We track their desperate trek across the ice.

Watching those last mountain peaks sink below the horizon must have felt like cutting their final connection to the known world. That moment was their point of no return. They had marched nearly twenty-five miles that day, pushing their heavy equipment up to ten thousand one hundred feet.

At latitude eighty-seven degrees South, Amundsen looked back to the north-east through the clear air. He felt certain they had seen the very last mountain peak on the continent. The Antarctic atmosphere is notorious for playing tricks on the eyes, though. The team was completely deceived.

The extreme cold creates atmospheric refractions that can bend light, which hides entire mountain ranges just beyond the horizon. Amundsen recorded his certainty in his logbook, but the geography was fooling them. They were calculating their position purely by dead reckoning, too. There were no landmarks left to cross-reference.

Every mile depended on the mechanical clicks of the sledge-meters trailing behind the runners. When they lost sight of that last stone, their entire world shrunk down to the white ice directly in front of their skis. Amundsen notes a strange sense of security settling over the team, despite how isolating that sounds.

The fine weather gave them a false sense of comfort. They believed they had conquered the worst of the mountain climbing and finally reached the safety of the flat plateau. The clear skies that gave them this final view were a trap. The next morning, the Antarctic plateau would show its true face.

That trap sprung the next morning. The clear skies Amundsen celebrated on December fourth had vanished. A gale blew in from the north on December fifth. It brought thick, falling snow and heavy drifts. The team was completely blinded. It changes everything about how they move. You lose your horizon. You lose your sense of balance too.

The ground itself became treacherous. They encountered severe sastrugi. These are massive, hard snow waves with abrupt, icy drops. Amundsen usually relied on scouts out in front to map the way. The forerunners tried to do their job. But the conditions made it impossible to stay upright.

A man could only manage three or four paces before falling down. That breaks their normal marching order. The scouts are supposed to protect the main party. The system broke down completely. In that blinding chaos, human navigation mattered less than pure survival. They had to rely entirely on the dogs and the wood.

The men on foot become followers instead of leaders. They were forced to walk in the wake of the sledges. It was the only way to spot the dangerous irregularities in the snow before tripping. They are just staring at the ground and watching the runners. They did more than watch. The men used the sledges for actual physical support.

Without holding onto the frames, they could not stay on their feet.

So the human forerunners are falling over in a complete whiteout. The entire mission rests on one man driving a dog team blind. That man was Helmer Hanssen. Amundsen placed Hanssen and his dogs at the front of the blind march.

But if Hanssen could not see his own feet, how could he possibly know he was heading south?

He had to steer the course entirely by compass. The physical terrain made reading that compass almost impossible, though. Because they were hitting those massive snow-waves?

The uneven ground gave the heavy sledges violent shocks. These impacts caused the compass needle to spin wildly in circles over and over. A spinning needle means you are navigating completely blind. The needle would fly around and settle for a brief moment. Then it would start the same dance all over again.

Yet Hanssen somehow kept his composure and steered through it. That sounds like complete guesswork. Did they actually stay on course?

When they finally managed to take a navigational observation, the data shocked them. Hanssen had steered accurately to a hair. How close was his estimate to their actual position?

The calculated dead reckoning and their actual solar observations agreed to within a single mile. A single mile of error after driving through a blinding gale is astonishing. They did it without slowing down. Even though they saw nothing, the sledge-meters showed they covered nearly twenty-five miles that day.

Against all odds, the team had conquered the whiteout and maintained a straight line toward their goal. They were making miles, but were they still climbing?

The answer to whether they had finally conquered the plateau wouldn't come from a compass. It would come from a pot of boiling water.

The relief of that smooth plain after days of falling over invisible ice waves must have been overwhelming. But the moment inside the tent, watching the water boil at the exact same temperature, is what really shifts the story from survival to science. That hypsometer reading changed everything for them.

Amundsen fully expected the boiling point to drop. That would have meant they were still climbing higher into the thin air.

Instead, the mercury stayed perfectly still. It proved they had finally leveled out at eleven thousand and seventy feet above the sea. So they were no longer fighting the mountain, but they were still stranded in a complete whiteout. They were entirely blind.

Yet they managed to march right past the eighty-eighth parallel and camp at exactly eighty-eight degrees nine minutes South. The plateau had flattened out, so they no longer had to gasp for breath every time they stumbled. But the featureless gray void around them remained absolute.

And yet, despite the lack of visibility, they knew their exact altitude because of a pot of boiling water. It was their only anchor. Confirming that altitude meant they had officially surpassed the height of their previous camp. The agonizing uphill struggle was behind them. They were finally standing firm on the flat roof of the world.

To pull off a calculation that precise after three days of absolute blindness is staggering. If that cloud curtain had not parted at exactly eleven a.m., their entire claim to the Pole could have been rejected by the global scientific community.

They were entirely dependent on dead reckoning since latitude eighty-six degrees, forty-seven minutes South. If Hanssen had miscalculated their course by even a fraction of a degree during that gale, the error would have multiplied across the miles.

Yet, when they finally checked the two sextants, the math put them at eighty-eight degrees, sixteen minutes South. They hit their estimated position exactly to the minute. It sounds like a miracle, but the physical reality on the ground was getting grimmer by the hour. The dogs were practically starving, right?

They were wasting away on a strict daily ration of just half a kilo of pemmican. That extreme deficit drove the animals into a state of pure frenzy. They began devouring anything they could reach. They chewed through leather boots, whips, and even the hard ebonite points of the team's ski-sticks.

If the dogs ate their equipment, the expedition was over. How did they keep the team from destroying the sledges they needed to carry their food?

They had to bury the sledges completely in the snow every single night. That was the only way to hide the fixed rawhide lashings from the dogs' teeth. If those lashings were severed, the sledges would have literally fallen apart into loose pieces of wood on the ice.

So they are digging out buried sledges every morning, starving, and pushing through a featureless white desert. But on December seventh, the environment suddenly shifts. The wind dropped, the sky cleared, and the temperature rose to minus zero-point-four degrees Fahrenheit.

For men who had been battered by frozen gales, that sub-zero weather felt genuinely summer-like. Inside the dark fabric of their tent, the trapped heat actually made the air feel sultry. That warmth must have felt like a gift because they were approaching a massive psychological threshold. They were closing in on the ghost of Ernest Shackleton.

Shackleton held the ultimate British record of eighty-eight degrees, twenty-three minutes South, which he established just two years earlier. Amundsen actually carried a silk Norwegian flag fastened to two ski-sticks on the lead sledge. He was waiting for the exact moment they crossed that invisible line.

Amundsen was leading the pace as the forerunner when he heard his men start cheering behind him. What did that moment look like?

He turned around and saw the silk flag flapping hard in the clean polar air. They had marched to eighty-eight degrees, twenty-five minutes South. This meant they had officially gone further south than any human beings in history. Amundsen later admitted that the sight broke his composure entirely, and he could not stop his tears.

It is striking that Amundsen stopped to praise his rival in his journal right there at the edge of the world. He wrote a tribute to Shackleton's pluck and grit. He acknowledged how much harder the British path had been. But the true triumph of that afternoon belonged to the Norwegians' own navigation system.

That brings us back to the central mystery of how they survived the plateau. How did they manage to hit their marks so perfectly without landmarks?

The revelation of this final push is that their mechanical dead reckoning was accurate to a single mile. They relied on the steady rotation of their sledge-meters and Hanssen's ability to steer by a spinning compass needle. That is how they conquered the blinding whiteout.

That absolute precision allowed them to hoist the Norwegian flag past Shackleton's farthest south. It proved that mathematical discipline wins the polar race.

They were gasping for breath at over eleven thousand feet. This was far above the grim altitude of the Butcher's Shop, and they were completely blinded by the polar gale. Hanssen navigated those blinding snow waves using nothing but his compass.

When the clouds finally parted and they caught the sun, their blind reckoning matched the sextant observations within a single mile. That precision gave them the scientific proof they needed. They could confidently hoist the Norwegian flag past the mark set by Shackleton. It shows a powerful convergence of math and raw human endurance.

Daniel, thanks for guiding us through the blizzards of the high plateau. If this story of the push for the pole inspired you, please share the episode with a friend. Until next time, keep questioning and keep discovering.