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Middle-atmospheric zonal and meridional wind profiles from polar, tropical and midlatitudes with the ground-based microwave Doppler wind radiometer WIRA
Institute of Applied Physics, University of Bern.
Institute of Applied Physics, University of Bern.
Institute of Applied Physics, University of Bern.
Chalmers University of Technology, Department of Earth and Space Sciences.
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2014 (English)In: Atmospheric Measurement Techniques, ISSN 1867-1381, E-ISSN 1867-8548, Vol. 7, 7717-7752 p.Article in journal (Refereed) Published
Abstract [en]

WIRA is a ground-based microwave Doppler spectro radiometer specifically designed for the measurement of profiles of horizontal wind in the upper stratosphere and lower mesosphere region where no other continuously running measurement technique exists. A proof of principle has been delivered in a previous publication. Since a technical upgrade which improved the signal to noise ratio by a factor of 2.4 the full horizontal wind field comprising zonal and meridional wind profiles is continuously measured. A completely new retrieval based on optimal estimation has been set up. Its characteristics are detailed in the present paper.Since the start of the routine operation of the first prototype in September 2010, WIRA has been measuring at four different locations at polar, mid and tropical latitudes for time periods between 5.5 and 11 months. A comparison between the data series from WIRA and ECMWF model data revealed agreement within 10% in the stratospheric zonal wind. The meridional wind profiles agree within their error bars over the entire sensitive altitude range of WIRA. However, significant differences in the mesospheric zonal wind speed of up to 40% have been found.

Place, publisher, year, edition, pages
2014. Vol. 7, 7717-7752 p.
National Category
Aerospace Engineering
Research subject
Atmospheric science
Identifiers
URN: urn:nbn:se:ltu:diva-6234DOI: 10.5194/amtd-7-7717-2014Local ID: 46ef23f1-dec0-48cb-929e-c4f8eb181cb7OAI: oai:DiVA.org:ltu-6234DiVA: diva2:979111
Note
Godkänd; 2014; 20140826 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-21Bibliographically approved

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