The Worst Journey in the World, Apsley Cherry-Garrard [free ebooks for android TXT] 📗

within a comparatively few miles of an open sea where the temperatures were over 40 degrees higher.” “It is quite impossible to believe that normally there is a difference of nearly 40 degrees in March between McMurdo Sound and the South of the Barrier.” The temperatures recorded by other sledge parties in March 1912 and those recorded at Cape Evans form additional evidence, in Simpson’s opinion, that the temperatures experienced by Scott were not such as might be expected during normal autumn weather.

Simpson’s explanation is based upon the observations made in McMurdo Sound by sending up balloons with self-recording instruments attached. These showed that very rapid radiation takes place from the snow surface in winter, which cools the air in the immediate neighbourhood: a cold layer of air is thus formed near the ground, which may be many degrees colder than the air above it. It becomes, as it were, colder than it ought to be. This, however, can only happen during an absence of wind: when a wind blows the cold layer is swept away, the air is mixed and the temperature rises.

The absence of wind from the south noted by Scott was, in Simpson’s opinion, the cause of the low temperatures met by Scott: the temperature was reduced ten degrees below normal at Cape Evans, and perhaps twenty degrees where Scott was.353

The third question is that of food. It is this point which is most important to future explorers. It is a fact that the Polar Party failed to make their distance because they became weak, and that they became weak although they were eating their full ration or more than their full ration of food, save for a few days when they went short on the way down the Beardmore Glacier. The first man to weaken was the biggest and heaviest man in the expedition: “the man whom we had least expected to fail.”

The rations were of two kinds. The Barrier (B) ration was that which was used on the Barrier during the outward journey towards the Pole. The Summit (S) ration was the result of our experiments on the Winter Journey. I expect it is the best ration which has been used to date, and consisted of biscuits 16, pemmican 12, butter 2, cocoa 0.57, sugar 3 and tea 0.86 ounces; total 34.43 ounces daily per man.

The twelve men who went forward started this S ration at the foot of the Beardmore, and it was this ration which was left in all depots to see them home. It was much more satisfying than the Barrier ration, and men could not have eaten so much when leading ponies or driving dogs in the early stages of summer Barrier sledging: but man-hauling is a different business altogether from leading ponies or driving dogs.

It is calculated that the body requires certain proportions of fat, carbohydrates and proteins to do certain work under certain conditions: but just what the absolute quantities are is not ascertained. The work of the Polar Party was laborious: the temperatures (the most important of the conditions) varied from comparative warmth up and down the glacier to an average of about −20° in the rarefied air of the plateau. The temperatures met by them on their return over the Barrier were not really low for more than a week, and then there came quite commonly minus thirties during the day with a further drop to minus forties at night, when for a time the sun was below the horizon. These temperatures, which are not very terrible to men who are fresh and whose clothing is new, were ghastly to these men who had striven night and day almost ceaselessly for four months on, as I maintain, insufficient food. Did these temperatures kill them?

Undoubtedly the low temperatures caused their death, inasmuch as they would have lived had the temperatures remained high. But Evans would not have lived: he died before the low temperatures occurred. What killed Evans? And why did the other men weaken as they did, though they were eating full rations and more? Weaken so much that in the end they starved to death?

I have always had a doubt whether the weather conditions were sufficient to cause the tragedy. These men on full rations were supposed to be eating food of sufficient value to enable them to do the work they were doing, under the conditions which they actually met until the end of February, without loss of strength. They had more than their full rations, but the conditions in March were much worse than they imagined to be possible: when three survivors out of the five pitched their Last Camp they were in a terrible state. After the war I found that Atkinson had come to wonder much as I, but he had gone farther, for he had the values of our rations worked out by a chemical expert according to the latest knowledge and standards. I may add that, being in command after Scott’s death, he increased the ration for the next year’s sledging, so I suppose he had already come to the conclusion that the previous ration was not sufficient. The following are some of the data for which I am indebted to him: the whole subject will be investigated by him and the results published in a more detailed form.

According to the most modern standards the food requirements for laborious work at a temperature of zero F (which is a fair Barrier average temperature to take) are 7,714 calories to produce 10,069 foot-tons of work. The actual Barrier ration which we used would generate 4,003 calories, equivalent to 5,331 foot-tons of work. Similar requirements for laborious work at −10° F (which is a high average plateau temperature) are 8,500 calories to produce 11,094 foot-tons of work. The actual Summit ration would generate 4,889 calories, equivalent to 6,608 foot-tons of work. These requirements are calculated for total absorption of all foodstuffs: but in practice, by visual proof, this does