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Edward Lorenz and the Butterfly Effect

Edward Lorenz and the Butterfly Effect

Harald Sack
On May 23, 1917, American mathematician, meteorologist, and a pioneer of chaos theory Edward Norton Lorenz was born. He is best known for pointing out the “butterfly effect” whereby chaos theory predicts that “slightly differing initial states can evolve into considerably different states.” In his 1963 paper in the Journal of Atmospheric Sciences, he cited the flapping of a seagull‘s wings as changing the state of the atmosphere in even such a…
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computer science
Jule Gregory Charney and the Science of Weather Prediction

Jule Gregory Charney and the Science of Weather Prediction

Harald Sack
On January 1, 1917, American meteorologist Jule Gregory Charney was born. Working with computer scientist John von Neumann, Charney first applied the electronic computer for weather prediction (1950) and brought about a new understanding of the large-scale flow circulation within the atmosphere. He is considered the father of modern dynamical meteorology. In 1979, the Charney report studied the relations of carbon dioxide and climate and became one of the earliest modern scientific…
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physics
Edmond Halley besides the Eponymous Comet

Edmond Halley besides the Eponymous Comet

Harald Sack
On November 8, 1656, English astronomer, geophysicist, mathematician, meteorologist, and physicist Sir Edmond Halley was born. Of course everybody has heard of Halley’s comet. We too already had an article on that topic [1]. But, Edmond Halley did much more than calculating the orbit of the eponymous comet. He compiled a catalogue of the stars of the Southern hemisphere, he also improved the sextant, and made observations about the ocean and the…
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meteorology
James Pollard Espy – the Storm King

James Pollard Espy – the Storm King

Harald Sack
On May 9, 1785, U.S. Meteorologist James Pollard Espy was born. Espy developed a convection theory of storms and developed the use of the telegraph in assembling weather observation data by which he studied the progress of storms and laid the basis for scientific weather forecasting. James Pollard Espy – Early Years The youngest of ten children, James Espy was born in Westmoreland County, Pennsylvania, USA. He had an ardent desire for…
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aviation
Wiley Post and the Discovery of the Jet Stream

Wiley Post and the Discovery of the Jet Stream

Harald Sack
On November 22, 1898, US-American aviator Wiley Hardeman Post was born. Post was the first pilot to fly solo around the world and is also known for his work in high-altitude flying, where helped develop one of the first pressure suits and discovered the jet stream. “I cut the emergency switch just in time to keep ‘Winnie Mae’ from making an exhibition of herself by standing on her nose. That would have been…
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