Thermography analysis of air flow dynamics in the ...whiteman/metcrax2/images/16amsmtnmet... · Thermography analysis of air flow dynamics in the Barringer Meteor Crater, Arizona,

[email protected] | www.climate.rub.de | AMS - 16th Conference on Mountain Meteorology | 08/21/2014

Thermography analysis of air flow dynamics in the Barringer Meteor Crater, Arizona, as part of the second Meteor Crater Experiment (METCRAX II) in October 2013

Thermography analysis of air flow dynamics in the Barringer Meteor Crater, Arizona, as part of the second Meteor Crater Experiment

(METCRAX II) in October 2013

AMS - 16th Conference on Mountain Meteorology



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Contact: [email protected] www.climate.rub.de

M. Grudzielanek (RUB); R. Vogt, J. Cermak, I. Feigenwinter, C. D. Whiteman, M. Lehner, S. W. Hoch, R. Rotunno, S. P. Oncley, M. G. Krausz, C. Bernhofer, and A. Pitacco

Thanks for technical support and additional IR cameras to Matthias Krauß (InfraTec), Andrea Pitacco (University of Padova) and Christian Bernhofer (University of Dresden)!



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METCRAX II: meteorological measurements in October 2013 in the Barringer Meteor Crater, Arizona Research questions :

Analyses of downslope‐windstorm types like - cold air flow - warm air intrusions - hydraulic flow into the crater. dynamic processes in and around the crater

Why IR analyses in addition?

- Surface (IR) temperatures changes show air temperature changes indirectly at special conditions (such as surface properties and correct measurement setup)

- Extensive data collection (up to 782,285 IR pixel in one IR picture) - IR data collection in sequenced way allow analysis of dynamic processes (time series analyses)



3 Barringer Meteor Crater, Arizona



IR Cam 2 IR Cam 1

IR views

South

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IR views IR Cam 3 (HD)

North

IR Cam 3 (HD)



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Research questions at METCRAX II, wich are additionally analysed with the IR method:

1. Identification and dynamics of the cold and warm air inflow into the craters south rim

3. Warm air intrusion (WAI) and resulting turbulences at the craters ground WAI

2. Thickness of the cold air pool in the crater over the night and at special flow dynamic situations

Cold air pool



WAIs

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Turbulence in the crater, no stable inversion

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Evaluation by combination with other data:

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Overview of the Barringer meteor crater; locations of compared measurements [R. Vogt, I. Feigenwinter]



IR temperature during IOP4 of the crater floor

2m air temperature at the crater floor station calculated IR temperature from the pyrgeometer (5min) IR temperature of polygon of IR DD and IR PD (0.5 Hz) IR temperature of polygon of IR DD and IR PD (5min average) Wind velocity at 3m at the crater floor station [R. Vogt, I. Feigenwinter]

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IR profile for Infrared profile diagrams

IR view to south IR view to north



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IR view to south



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Infrared profile with view to south and profile diagrams for IOP2, IOP3 and IOP4



IR method at METCRAX II

What is possible? - Analysis of air mass processes, which accur together with temperature changes - Analysis at different scales - Combination with other data is possible - Data analysis as

1. visualisation 2. time series statistical analysis

What has to be considered? - The recorded surfaces have to be dry and reactive to air temperature changes - surface properties can be different in one recorded IR investigation area emissivity, humidity (near ground condensation), temperature reactivity and heat storage

- 2D-IR picture showing a 3D domain different angles of IR Cam view in one IR picture

Big benefit for dynamic air process understanding by additional IR method

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Thank you!

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Thermography analysis of air flow dynamics in the ...whiteman/metcrax2/images/16amsmtnmet... · Thermography analysis of air flow dynamics in the Barringer Meteor Crater, Arizona,