H
H. U. Widdel
Researcher at Max Planck Society
Publications - 40
Citations - 593
H. U. Widdel is an academic researcher from Max Planck Society. The author has contributed to research in topics: Mesosphere & Wind shear. The author has an hindex of 15, co-authored 40 publications receiving 586 citations.
Papers
More filters
Journal ArticleDOI
Neutral air turbulence in the upper atmosphere observed during the Energy Budget Campaign
E. V. Thrane,O. Andreassen,Tom A. Blix,B. Grandal,Asgeir Brekke,C. R. Philbrick,F. J. Schmidlin,H. U. Widdel,U. von Zahn,Franz-Josef Lübken +9 more
TL;DR: In this article, a number of different experimental techniques employed in the campaign provided measurements on the fine scale structure of the upper atmosphere, from which information about turbulent intensity, eddy transport and eddy dissipation rates may be extracted.
Journal ArticleDOI
Small Scale Structure and Turbulence in the Mesosphere and Lower Thermosphere at High Latitudes in Winter
E. V. Thrane,Tom A. Blix,Chris Hall,T.L. Hansen,U. von Zahn,W. Meyer,Peter Czechowsky,Gerhard Schmidt,H. U. Widdel,A. Neumann +9 more
TL;DR: The MAP/WINE campaign has yielded information on small scale structure and turbulence in the winter mesosphere and lower thermosphere by a number of very different remote and in situ techniques as mentioned in this paper.
Journal ArticleDOI
Vertical movements in the middle atmosphere derived from foil cloud experiments
TL;DR: In this paper, the vertical velocities of air in the mesosphere were measured by small foil clouds tracked by radar at Andenes (69°) during January and February 1984.
Journal ArticleDOI
Mean state densities, temperatures and winds during the MAC/SINE and MAC/EPSILON campaigns
Franz-Josef Lübken,U. von Zahn,A. H. Manson,Chris Meek,Ulf-Peter Hoppe,F. J. Schmidlin,Jacek Stegman,Donal P. Murtagh,Rüdiger Rüster,Gerhard Schmidt,H. U. Widdel,Patrick J. Espy +11 more
TL;DR: In this article, two field campaigns were conducted, primarily in northern Norway, in the summer and late autumn of 1987; these yielded a total of 41 in situ temperature profiles and 67 in situ wind profiles.
Journal ArticleDOI
Foil chaff clouds as a tool for in-situ measurements of atmospheric motions in the middle atmosphere: their flight behaviour and implications for radar tracking
TL;DR: In this article, the aerodynamic behavior of foil chaff (rectangular plates) used for in-situ measurements of atmospheric motions in the middle atmosphere (up to 100 km altitude) can be described by Stokes' Law in which the corrections are applied to the coefficient of viscosity.