Abstract : 2D.9
The surface radiation balance in and around Arizona's Meteor Crater

Sebastian W. Hoch, C. David Whiteman
Meteorology Department, University of Utah

The Meteor Crater Experiment (METCRAX 2006) investigated the formation of the stable boundary layer in Arizona's Meteor Crater during October 2006. This crater, 1.2 km in diameter and 165 m in depth, is located 65 km east of Flagstaff, Arizona, and was formed by a meteorite impact approximately 50,000 years ago.

One of the most important boundary conditions for the cooling and heating of the atmosphere within the crater basin is the surface radiation balance. Detailed observations of all four slope-parallel components of the radiation balance (incoming and outgoing longwave and shortwave radiation) and measurements of horizontal and slope-parallel net radiation were made at seven different sites during the one-month-long experimental period. Measurements were made over horizontal surfaces at three sites -- on the plain outside the Meteor Crater, on the crater's rim, and at the center of the crater floor. Additionally, measurements were made at two sites on both the east and west sidewalls of the crater at different altitudes and slope angles. This paper focuses on the distribution of radiative energy on the three-dimensional topography within and outside the crater and the topographic effects on the radiation variables during cloud-free days.