Alfred Wegener

Alfred Lothar Wegener was a German climatologist, geologist, geophysicist, meteorologist, and polar researcher. He was born on 1 November 1880 and passed away in November 1930.

Wegener is best known today for proposing the continental drift hypothesis in 1912. He suggested that the continents slowly move around the Earth. At the time, many scientists did not agree with his idea. It was not until the 1960s, when new discoveries such as palaeomagnetism were made, that his hypothesis gained acceptance. These discoveries helped form the modern understanding of plate tectonics.

Before the jet stream was widely accepted, Wegener took part in several expeditions to Greenland. These trips focused on studying polar air circulation. During these expeditions, participants made important meteorological observations. They were the first to spend the winter on the inland Greenland ice sheet and also the first to bore ice cores on a moving Arctic glacier.

Biography

Alfred Wegener was born in Berlin on 1 November 1880. He came from a family of teachers and grew up near Rheinsberg, where his family had a vacation home.

Wegener studied physics, meteorology, and astronomy. He worked at an observatory and helped develop weather balloons to study the atmosphere. In 1906, he joined his first Greenland expedition, where he set up the first weather station in Greenland.

In 1912, Wegener shared his big idea: that continents slowly move around Earth. This idea, called continental drift, was not accepted by many scientists at first.

During World War I, Wegener served in the army but was later assigned to work on weather for the military. After the war, he kept studying weather and climate. He also wrote about his continental drift theory in several books.

Wegener made many trips to Greenland to study ice and weather. On his last trip in 1930, he and his team were trying to set up weather stations across the ice. Wegener set out to bring supplies but never made it back. He died on the journey, and his body was later found and buried in the ice.

Continental drift theory

Alfred Wegener noticed that the world's large landmasses almost fit together like pieces of a puzzle. The edges of the Americas match closely with Africa and Europe, while Antarctica, Australia, India, and Madagascar fit next to Southern Africa. In 1912, Wegener shared his idea called continental drift. He studied rocks, structures, and fossils on both sides of the Atlantic Ocean and found many similarities.

Wegener believed all continents were once joined together in one big landmass and later moved apart. He thought forces like Earth's rotation or the movement of the ocean floor might cause this drift. In 1915, he wrote a book sharing his theory, naming the ancient supercontinent "Urkontinent" (similar to "Pangaea"). He added more evidence in later editions of his book.

Some scientists supported Wegener's ideas, but many geologists were skeptical at first. They questioned how the continents could move. Over time, especially after Wegener's death, more discoveries helped prove his theory. It wasn't until the 1960s that most scientists accepted continental drift as part of the theory of plate tectonics.

Modern developments

In the early 1950s, a new science called paleomagnetism began to support Alfred Wegener's idea. Scientists at the University of Cambridge and Imperial College found evidence that matched his predictions. By 1953, samples from India showed the country was once in the Southern Hemisphere, just as Wegener thought.

The 1960s brought big changes in how we understand the Earth. Discoveries like seafloor spreading and Wadati–Benioff zones helped bring back Wegener's idea in a new way called plate tectonics. Maps of the ocean floors made by Marie Tharp and Bruce Heezen were very important for this change in thinking. Wegener was honored after his death for starting one of the biggest scientific changes of the 20th century.

In 1993, with the Global Positioning System (GPS), scientists could finally measure how continents move directly.

Awards and honours

The Alfred Wegener Institute for Polar and Marine Research in Bremerhaven, Germany, was created in 1980 to honor Wegener on his centenary. It gives out the Wegener Medal in his memory. There are also places named after him, like a crater on the Moon, a crater on Mars, the asteroid 29227 Wegener, the Wegener Peninsula in Eastern Greenland, and a peninsula in Western Greenland where he passed away.

The European Geosciences Union gives an Alfred Wegener Medal & Honorary Membership to scientists who have done outstanding work in atmospheric, hydrological, or ocean sciences.

Selected works

Alfred Wegener wrote many important books and articles. Some of his most famous works include:

• Thermodynamics of the Atmosphere (1911)
• A paper called "The Formation of Major Landforms of the Earth’s Crust (Continents and Oceans) on Geophysical Basis" presented in 1912
• The Origin of Continents and Oceans (1922), which was later updated and published in several editions

Wegener also worked with others on books about past climates and wrote about his trips to Greenland.