= Ermanno Pietropaolo
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<Ermanno Pietropaolo> is a physicist whose research at the University of L'Aquila links observations of the Sun to measurements of the <solar wind> and the environment around Earth. His institutional research profile describes studies of dynamics in the <photosphere> and <chromosphere>, <Alfvén wave> fluctuations at different distances from the Sun, and instrumentation for ground-based observations relevant to <space weather>.<Ermanno Pietropaolo research profile by the University of L’Aquila>[Research tab, solar physics, interplanetary medium and Sun–Earth relations]{ref}
He coauthored the 2007 study that tested an <energy cascade> using <solar wind> measurements from the <Ulysses spacecraft>.<Observation of inertial energy cascade in interplanetary space plasma by Luca Sorriso-Valvo and others>[byline and abstract]{ref} The scientific connection is between a physical flow and a measurement procedure: instruments record <velocity> and <magnetic field>, and statistical analysis asks whether changes at different separations agree with <magnetohydrodynamic turbulence>. His profile's emphasis on apparatus and observing conditions is relevant because a change in a measured fluctuation must be distinguished from a change introduced by the observing system itself.
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