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Manuela Lehner, C. David Whiteman, Sebastian W. Hoch, Erik T. Crosman, Matthew E. Jeglum, Nihanth W. Cherukuru, Ronald Calhoun, Bianca Adler, Norbert Kalthoff, Richard Rotunno, Thomas W. Horst, Steven Semmer, William O. J. Brown, Steven P. Oncley, Roland Vogt, A. Martina Grudzielanek, Jan Cermak, Nils J. Fonteyne, Christian Bernhofer, Andrea Pitacco, and Petra Klein

Abstract

The second Meteor Crater Experiment (METCRAX II) was conducted in October 2013 at Arizona’s Meteor Crater. The experiment was designed to investigate nighttime downslope windstorm−type flows that form regularly above the inner southwest sidewall of the 1.2-km diameter crater as a southwesterly mesoscale katabatic flow cascades over the crater rim. The objective of METCRAX II is to determine the causes of these strong, intermittent, and turbulent inflows that bring warm-air intrusions into the southwest part of the crater. This article provides an overview of the scientific goals of the experiment; summarizes the measurements, the crater topography, and the synoptic meteorology of the study period; and presents initial analysis results.

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