September 30, 2013 to October 30, 2013
Project Location: 
Barringer Meteorite Crater, Arizona
Project Phase: 
Funding Type: 
NSF Funded
Project Description: 

METCRAXII was the second experiment studying the atmospheric boundary layer of the Arizona Meteor Crater.

METCRAX II investigated downslope-windstorm-type flows that develop when thermally-driven drainage flows cascade over the rim of the Arizona Meteorite Crater on clear, undisturbed nights. These flows are ubiquitous in mountains throughout the world, but occur on a regular basis at this location and on scale that is uniquely amenable to observation with surface-based instrumentation. The goals of the project were to determine the characteristic atmospheric structure and evolution associated with these flows and the controlling parameters in the katabatic winds that drive them. The field observations will also be used to develop and validate LES models that can extend the findings to basins and ridges of different sizes and shapes.

For information about the first METCRAX experiment, see the METCRAX Project Page.


Other Links

University of Utah METCRAXII


Measurement Sites

NCAR provided the following instrumentation for METCRAX. See the Google Earth KMZ file or a PDF of METCRAX sites.

EOL Instrumentation at METCRAXII
Site Instrumentation Local Network Internet Link Latitude Longitude
far (A) 10 meter tower, radiation, soil WIFI   34.9668 [1] -111.0530 [1]
base  (B) 10 meter tower, GAUS, ceilometer, all-sky camera Copper ethernet to trailer   35.0173 [1] -111.0343 [1]
base trailer server and user computers WIFI Hughes    
near (B1) 50 meter tower, radiation, soil, precip, SODAR/RASS WIFI   35.0110 [1] -111.0380 [1]
rim (C) 40 meter tower WIFI Cellular 35.0221 [1] -111.0256 [1]
crater floor (D) 10 meter tower, radiation, soil WIFI   35.0281 [1] -111.0224 [1]
nrim (visitor center) LIDAR WIFI      
profiler 449 wind profiler, 10m tower   Hughes, Cellular?    

[1] latitude and longitude values were computed from 24 hour means of the values on Oct 10 from the GPS units on the data acquisition DSMs. These are also the values shown in the .kmz file.

The tower, radiation and soil instrumention were provided by the Integrated Surface Flux System (ISFS) at EOL. See ISFS at METCRAXII for more information.

The LIDAR, GAUS soundings, ceilometer, sky camera, SODAR/RASS and 449 wind profiler were provided by the Atmospheric Profiling Group (APG) at EOL. See APG at METCRAXII for more information.