Tambora Erupts in 1815 and Changes World History [Excerpt]

In 1816 a remarkable thing happened?there was no summer weather in much of the Northern Hemisphere. This excerpt from The Year without Summer explains why

By William K. Klingaman and Nicholas P. Klingaman

SUMMER KILLER: The eruption of Mount Tambora was so powerful that it blocked enough sunlight to change global weather. Image: Courtesy of Jialiang Gao

From The Year without Summer, by William K. Klingaman and Nicholas P. Klingaman. Copyright ? 2013, by the authors and reprinted by permission of Saint Martin?s Press, LLC.

JUST BEFORE SUNSET on April 5, 1815, a massive explosion shook the volcanic island of Sumbawa in the Indonesian archipelago. For two hours, a stream of lava erupted from Mount Tambora, the highest peak in the region, sending a plume of ash eighteen miles into the sky.

More than eight hundred miles away, Thomas Stamford Raffles, the lieutenant-governor of Java, heard the blast at his residence and assumed it came from cannon firing in the distance. Other British authorities on the island made the same mistake. Fearing a neighboring village was under attack, the commander of the city of Djogjokarta, in central Java, dispatched troops to repel the invaders. Officials along the coast interpreted the sounds as signals from a ship in distress, and launched rescue boats to look for survivors.

At Makassar on the southwestern tip of Sulawesi, 240 miles northeast of Tambora, the commander of the Benares, a cruiser of the British East India Company, reported ?a firing of cannon? on April 5. The explosions appeared to come from the south; as they continued, ?the reports seemed to approach much nearer, and sounded like heavy guns occasionally, with slighter reports between.? Assuming that pirates were in the area, the Benares put to sea and spent the next three days scouring nearby islands for any signs of trouble, but found nothing. Nearly five hundred miles farther to the east, the British resident on the island of Ternate heard ?several very distinct reports like heavy cannon,? and sent another cruiser, the Teignmouth, to investigate. It, too, returned empty-handed.

British authorities might have been excused for assuming that the threatening sounds came from potential enemies rather than the earth itself. They were not yet accustomed to the frequent volcanic eruptions that plagued the Indonesian islands. Britain had gained control of Java and the surrounding islands less than four years earlier, when British troops overwhelmed a vastly outnumbered band of French defenders who themselves had held Java for only a short time, having taken it from the Dutch when France conquered the Netherlands in 1794. By the spring of 1815, neither the government in London nor the British East India Company was entirely certain that they wanted to keep the island, since the expense of administering and defending it had outweighed the commercial benefits thus far.

Responsibility for British policy on the scene lay squarely with Raffles himself. The son of a ship?s captain, Raffles?who actually was born at sea, off the coast of Jamaica?dreamt of a British maritime empire throughout South Asia, an ?Eastern insular Empire? that would provide new markets for English cotton and woolen textiles, and a profitable supply of coffee and sugar for Europe. It was Raffles who had persuaded the governor general of India, Lord Minto, to seize Java in the first place. Raffles also hoped to use Java as an avenue to improve relations with Japan, which he viewed as a rising Asiatic power. Meanwhile, heeding Minto?s advice to ?do as much good as we can? while governing Java, Raffles reformed the colonial administration of the island, limiting the powers of the great landowners over their tenants and ameliorating the worst abuses of slavery while banning the importation of slaves under fourteen years of age.

But Raffles? interests in the region extended beyond politics and commerce. After years of study, he was sufficiently fluent in the Malay language to conduct discussions directly with local chieftains. He regularly employed botanists and zoologists to obtain?at his own expense?specimens of local flora and wildlife, some of which he had preserved in spirit and shipped back to Britain. In his capacity as president of the Batavian Society, dedicated to the study of Java?s natural history, Raffles frequently toured the island and recorded his observations of geological phenomena. Several weeks before Mount Tambora erupted, Raffles became the first European to ascend a nearby mountain known as Gunong Gede; by using thermometers to measure the difference in temperature between the base and the peak, Raffles and his companions determined that they had climbed at least seven thousand feet. ?We had a most extensive prospect from the summit,? he subsequently wrote to a friend. ?The islands all round were quite distinct and we traced the sea beyond the southernmost point of Sumatra; the surf on the south coast was visible to the naked eye.?

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