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Discussion papers
https://doi.org/10.5194/acp-2018-1361
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2018-1361
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 07 Feb 2019

Research article | 07 Feb 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).

Winter 2018 major sudden stratospheric warming impact on midlatitude mesosphere from microwave radiometer measurements

Yuke Wang1, Valery Shulga1,2, Gennadi Milinevsky1,3, Aleksey Patoka2, Oleksandr Evtushevsky3, Andrew Klekociuk4,5, Wei Han1, Asen Grytsai3, Dmitry Shulga2, Valery Myshenko2, and Oleksandr Antyufeyev2 Yuke Wang et al.
  • 1College of Physics, International Center of Future Science, Jilin University, Changchun, 130012, China
  • 2Institute of Radio Astronomy, NAS of Ukraine, Kharkiv, 61002, Ukraine
  • 3Taras Shevchenko National University of Kyiv, Kyiv, 01601, Ukraine
  • 4Antarctica and the Global System, Australian Antarctic Division, Kingston, 7050, Australia
  • 5Antarctic Climate and Ecosystems Cooperative Research Centre, Hobart, 7000, Australia

Abstract. The impact of a major sudden stratospheric warming (SSW) in the Arctic in February 2018 on the mid-latitude mesosphere was investigated by performing microwave radiometer measurements of carbon monoxide (CO) and zonal wind above Kharkiv, Ukraine (50.0° N, 36.3° E). The mesospheric peculiarities of this SSW event were observed using recently designed and installed microwave radiometer in East Europe for the first time. The data from the ERA-Interim and NCEP–NCAR reanalyses, as well as the Aura Microwave Limb Sounder measurements, have been also used. Microwave observations of the daily CO profiles in January–March 2018 allowed retrieving mesospheric zonal wind at 70–85 km (below the winter mesopause) over the Kharkiv site. The reverse of the mesospheric westerly from about 10 m s−1 to the easterly wind of about −10 m s−1 around 10 February has been registered. Local microwave observations in the NH midlatitudes combined with reanalysis data show wide ranges of daily variability in CO, zonal wind, temperature and geopotential height in the mesosphere and stratosphere during the SSW 2018. Oscillations in the vertical CO profile, zonal wind, and geopotential height during the SSW, stratopause disappearance after the SSW onset and strong CO and westerly wind peaks at the start of the SSW recovery phase have been observed. The observed CO variability can be explained by vertical and horizontal air mass redistribution due to planetary wave activity with the replacement of the CO-rich air by CO-poor air and vice versa, in agreement with other studies. The results of microwave measurements of CO and zonal wind in the midlatitude mesosphere at 70–85 km altitudes, which still is not adequately covered by ground-based observations, are useful for improving our understanding of the SSW impacts in this region.

Yuke Wang et al.
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Yuke Wang et al.
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Latest update: 16 Feb 2019
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Short summary
The major sudden stratospheric warming (SSW) dramatically changed atmospheric conditions from mesosphere to troposphere. This event is accompanied by a sharp increase in the stratosphere temperature and zonal wind reverse producing strong changes in surface weather. These changes affect even the midlatitude mesosphere, which is not widely covered by observations. Our newly installed microwave radiometer allowed studying mesospheric zonal wind to understand the SSW 2018 behavior at mid-latitudes.
The major sudden stratospheric warming (SSW) dramatically changed atmospheric conditions from...
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