On the night of 14–15 April 1912 in the North Atlantic, the passenger liner Titanic collided with an iceberg and sank. There were investigations into the iceberg and the fatal damage the collision caused to the supposedly unsinkable ship. The most important sources about the iceberg are reports from surviving crew and passengers of Titanic. Photographs were taken of icebergs near the spot where Titanic's lifeboats were found, and it is purportedly visible in one of these photos. The iceberg was often seen metaphorically as a counterpart to the luxurious ship, standing for the cold and silent force of nature that cost the lives of over 1,500 people. It was also seen in various political and religious contexts, and has appeared in poetry as well as in pop culture.
Origin and fate
It can only be speculated where and when the Titanic iceberg calved from its glacier. Olson, Doescher, and Sinnott suspect the origin of the fatal iceberg in the Jakobshavn Glacier near Disko Bay on Greenland's west coast. It may have formed in 1910 or 1911 and could have drifted north with the West Greenland Current into Baffin Bay, from where it would have drifted south again thanks to the Labrador Current. An iceberg can, for example, be washed up on the coast or run aground. There it melts, or it comes free again and continues its journey south. The authors also address the question of whether a certain constellation of the Sun, Earth, and Moon may have had an influence. On 4 January 1912, there was a spring tide at the same time that the Moon was closer to the Earth than usual. This could have influenced the calving of icebergs. Although an iceberg so calved would hardly have reached the site of Titanic disaster in April of the same year, the spring tide may have played a role in refloating a stranded iceberg. Bigg and Wilton doubt that the solar arrangement of the Moon, Earth, and Sun in question was significant. A few days around 4 January would not have had much influence on calving; in winter, moreover, many fjords were blocked by sea ice. There was also increased iceberg formation in other years. When it comes to calving, they tend to think of factors like the water surface temperature of the Labrador Sea.
For their part, Bigg and Wilton have tried to show a possible path of the fatal iceberg with the help of computer simulations. To do this, they assumed that icebergs at that time originated mainly in the south or southwest of Greenland, whereas today they originate more from the northwest of the island. In 1912, more icebergs were sighted than on average in the 20th century, but it was not an extreme iceberg year. The warm and wet year 1908 created the conditions for a huge iceberg to travel in the early autumn of 1911 near southwest Greenland. This would have traveled west towards Canada and been transported south by the Labrador Current – along the Canadian coast and the island of Newfoundland, the so-called Iceberg Alley. Because of the systematic observations of icebergs at the time (even before the Ice Patrol was established), it is even very likely, according to Bigg and Wilton, that the later fatal iceberg was sighted in the process. From 10 to 15 April, there was a high-pressure area over most of the North Atlantic. It remained there for the first three days of Titanic's voyage, ensuring calm seas and clear skies. On 13 April, a depression over Greenland with cold polar air and winds from the northwest drove icebergs south into the shipping lanes. Because of the calm sea, the icebergs hardly created any breakwaters, making them difficult to see at night. On its way into the Atlantic and also after the collision, the iceberg melted because of the water temperature. An iceberg exists for about two to three years, often in a state of vertical rotation as underwater melting changes the center of gravity of the top-heavy mass. Accordingly, if the fatal iceberg calved in 1910 or 1911, it may not have disappeared until the end of 1912 or even during 1913. However, considering that the iceberg may have been three years old at the time of the collision, it probably existed for only a week or two after the April 1912 accident, because it may soon have reached the warmer waters of the Gulf Stream.
Ice warnings
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