This material is based upon work supported by the National Science Foundation (NSF) under Grants ATM-0444205, -0521776, and -0837870. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the NSF. Author SWH received support from Army Research Office grant 52734-EV. Author ML was supported by a Doktoratsstipendium from the Nachwuchsförderung der Universität Innsbruck and a Stipendium für kurzfristige wissenschaftliche Arbeiten im Ausland (Universität Innsbruck). We thank the Barringer Crater Company and Meteor Crater Enterprises, Inc., for access to the field site. The National Center for Atmospheric Research Earth Observing Laboratory provided equipment, field support and quality-controlled data sets. We thank Maura Hahnenberger (University of Utah) and the staff of the NCAR Integrated Soundings System and Integrated Surface Flux System for their field and data processing assistance and Maura Hahnenberger for scientific discussions. We thank three anonymous reviewers for useful comments on this manuscript.
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