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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/amt-2020-405
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2020-405
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  20 Oct 2020

20 Oct 2020

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This preprint is currently under review for the journal AMT.

Validation of wind measurements of two MST radars in northern Sweden and in Antarctica

Evgenia Belova1, Peter Voelger1, Sheila Kirkwood1, Susanna Hagelin2, Magnus Lindskog2, Heiner Körnich2, Sourav Chatterje3, and Karathazhiyath Satheesan4 Evgenia Belova et al.
  • 1Swedish Institute of Space Physics, Kiruna, SE-98128, Sweden
  • 2Swedish Meteorological and Hydrological Institute, Norrköping, SE-60176, Sweden
  • 3National Centre for Polar and Ocean Research, Ministry of Earth Sciences, Goa, 403804, India
  • 4Department of Atmospheric Sciences, School of Marine Sciences Cochin University of Science and Technology, Cochin, Kerala, 682 016, India

Abstract. Two atmospheric VHF radars: ESRAD located near Kiruna in the Swedish Artic and MARA at Indian research station Maitri in Antarctica perform wind measurements in the troposphere and lower stratosphere on a regular basis. We compared horizontal winds at altitudes between about 0.5 km and 14 km derived from the radar data using the full correlation analysis technique with radiosonde observations and models. The comparison with 28 radiosondes launched from January 2017 to August 2019 showed that ESRAD underestimates the zonal and meridional winds by about 8 % and 25 %, respectively. The mean differences between the radar and radiosonde winds are −1.4 m/s and 0.4 m/s. A similar result was found when comparing with the regional NWP model HARMONIE-AROME for the period September 2018–May 2019. The ESRAD random error was estimated to be 2.8 m/s (2.4 m/s) for the zonal (meridional) component. The comparison of MARA with the ECMWF ERA5 reanalysis for January–December 2019 reveals good agreement between them with the mean difference between 0.1 m/s and −0.5 m/s depending on the component and season. The MARA random errors are 2.6 m/s and 2.3 m/s for the zonal and meridional winds, respectively.

Evgenia Belova et al.

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Latest update: 30 Nov 2020
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Short summary
We validate horizontal wind measurements at altitudes 0.5 km–14 km made with atmospheric radars: ESRAD located near Kiruna in the Swedish Arctic and MARA at the Indian research station Maitri in Antarctica, by comparison with radiosondes, the regional model HARMONIE-AROME and ECMWF ERA5 reanalysis. Good agreement was found in general, and radar bias and uncertainty were estimated. These radars are planned to be used for validation of winds measured by lidar by the ESA satellite Aeolus.
We validate horizontal wind measurements at altitudes 0.5 km–14 km made with atmospheric radars:...
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