19th Annual Buonsanto Lecture | MIT Haystack Observatory (20 November 2018): Larisa Goncharenko

"How Sudden Stratospheric Warnings Affect the Whole Atmosphere: The Butterfly Effect in Action"

Weather events 10 to 50 kilometers above Earth’s surface, in the atmospheric layer called the stratosphere, affect weather on the ground as well as weather hundreds of kilometers above. Meteorologists are looking to improve their short- and long-term weather forecasts by accurately representing the way stratospheric disturbances propagate downward into the troposphere, the atmospheric layer closest to Earth’s surface. However, space weather scientists who study the ionosphere and thermosphere, which are hundreds of kilometers above the ground, have different challenges. Due to the complexity of connections and sparse data sets, accurate predictions even 24 hours in advance remain a challenge. Major progress in understanding what drives the state of the thermosphere and ionosphere was achieved during the last decade due to the focus on sudden stratospheric warming, a type of large-scale meteorological disturbance. A large variety of changes occurs in the ionosphere during such events, from high-latitude disturbances in the Arctic to large-scale perturbations near the equator and even major ionospheric variations in Antarctica, all the way across the globe. This lecture will describe our current understanding of physical mechanisms responsible for these connections and outline future challenges and unsolved problems.

Tuesday, 20 November, 2018

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I am studying this phenomenon presented by the researcher Dr. LP Goncharenko, I am happy to have this video presentation, because it helps us to understand in greater depth the phenomenon and its article.