Julius Bartels

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Grave of Julius Bartels in the Göttingen city cemetery

August Julius Bartels (born August 17, 1899 in Magdeburg , † March 6, 1964 in Göttingen ) was a German geophysicist . He also dealt with the sun-earth interactions.

Life

In 1917 he began his studies in Göttingen , which he completed in 1923 with a dissertation with Wilhelm Meinardus . His teachers included, in addition Emil Wiechert , among others , Max Born , Richard Courant , James Franck and David Hilbert . He himself later taught the well-known geophysicist and hydrodynamicist Hans Ertel .

After his habilitation , he taught as a full professor at Berlin University from 1936 and in Göttingen from 1946 . He was director of the Institute for Geophysics at the Georg-August University in Göttingen . He was also director of the Institute for Physics of the Stratosphere of the Max Planck Institute for Aeronomy in Katlenburg-Lindau from 1955 to 1964 . In 1941 he was elected a member of the German Academy of Sciences Leopoldina . In 1947 he was elected a full member of the Göttingen Academy of Sciences .

Julius Bartels identified the sun as a source of regularly recurring geomagnetic disturbances. In 1949 he developed the Kp index as a measure of geomagnetic activity, which is determined using a standardized procedure from data from 13 worldwide observatories and is still widely used today. The Kp index is recognized by the IUGG / IAGA (International Association of Geomagnetism and Aeronomy) as an important measure and has been determined at the Niemegk Earth Magnetic Observatory since 1997 .

Julius Bartels was a member of numerous national and international scientific societies and was honored in 1955 with the Emil Wiechert Medal , which was first awarded on this occasion . In his honor, the Julius Bartels Medal is awarded by the Department of Solar-Terrestrial Relations of the European Geosciences Union .

Bartels' rotation number of the sun and the Bartels lunar crater are named after him .

Publications

  • Geophysics , Heidelberg, C. Winter 1944
  • Editor with Gustav Angenheister: Geophysik , Fischer Bücherei 1960, 1969
  • Collaboration on Beno Gutenberg (editor) Textbook of Geophysics , Berlin, Gebrüder Borntraeger 1929
  • with Sydney Chapman Geomagnetism , Oxford, Clarendon Press 1940

literature

  • Wilfried Schröder published an obituary for Julius Bartels in 1964 in the Meteorologische Rundschau .
  • Further obituaries were published by Hans Ertel in the yearbook of the German Academy of Sciences in 1964 and by Walter Kertz in Research and Progress 1964 (p. 317).
  • Wilfried Schröder presented the relationships between Sydney Chapman and Julius Bartels ( Contributions History, Geophysics and Cosmic Physics , 2008).

Web links

Individual evidence

  1. ↑ Holger Krahnke: The members of the Academy of Sciences in Göttingen 1751-2001 (= Treatises of the Academy of Sciences in Göttingen, Philological-Historical Class. Volume 3, Vol. 246 = Treatises of the Academy of Sciences in Göttingen, Mathematical-Physical Class. Episode 3, vol. 50). Vandenhoeck & Ruprecht, Göttingen 2001, ISBN 3-525-82516-1 , p. 31.
  2. ^ Julius Bartels Medal
personal data
SURNAME Bartels, Julius
ALTERNATIVE NAMES Bartels, August Julius (full name)
BRIEF DESCRIPTION German geophysicist and university professor
DATE OF BIRTH 17th August 1899
PLACE OF BIRTH Magdeburg
DATE OF DEATH March 6, 1964
Place of death Goettingen