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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-2017-191
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
13 Jul 2017
Review status
This discussion paper is a preprint. A revision of this manuscript was accepted for the journal Atmospheric Measurement Techniques (AMT) and is expected to appear here in due course.
Variability of the Brunt-Väisälä frequency at the OH*-layer height
Sabine Wüst1, Michael Bittner1,2, Jeng-Hwa Yee3, Martin G. Mlynczak4, and James M. Russell III5 1Deutsches Fernerkundungsdatenzentrum, Deutsches Zentrum für Luft - und Raumfahrt , 82234 Oberpfaffenhofen, Germany
2Institut für Physik, Universität Augsburg, 86159 Augsburg, Germany
3Applied Physics Laboratory, The Johns Hopkins University, Laurel, Maryland, USA
4NASA Langley Research Center, Hampton, USA
5Center for Atmospheric Sci ences, Hampton, USA
Abstract. In and near the Alpine region, the most dense sub-network of identical NDMC instruments (Network for the Detection of Mesospheric Change, http://wdc.dlr.de/ndmc) can be found: five stations are equipped with OH*-spectrometers which deliver a time series of mesopause temperature each cloudless or only partially cloudy night. These measurements are suitable for the derivation of the density of gravity wave potential energy—knowledge about the Brunt-Väisälä frequency provided.

However, OH*-spectrometers do not deliver vertically-resolved temperature information, which are necessary for the calculation of the Brunt-Väisälä frequency. Co-located measurements or climatological values are needed. We use 14 years of satellite-based temperature data (TIMED-SABER, 2002–2015) to investigate the inter- and intra-annual variability of the Brunt-Väisälä frequency at the OH*-layer height between 43.93–48.09° N and 5.71–12.95° E and provide a climatology.


Citation: Wüst, S., Bittner, M., Yee, J.-H., Mlynczak, M. G., and Russell III, J. M.: Variability of the Brunt-Väisälä frequency at the OH*-layer height, Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2017-191, in review, 2017.
Sabine Wüst et al.
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC1: 'Review of amt-2017-191', Christian von Savigny, 20 Jul 2017 Printer-friendly Version 
AC1: 'Answerto amt-2017-191-RC1', Sabine Wüst, 26 Sep 2017 Printer-friendly Version Supplement 
 
RC2: 'amt-2017-191-review', Anonymous Referee #2, 24 Jul 2017 Printer-friendly Version Supplement 
AC2: 'Answer to amt-2017-191-RC2', Sabine Wüst, 26 Sep 2017 Printer-friendly Version Supplement 
Sabine Wüst et al.
Sabine Wüst et al.

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Short summary
In the Alpine region, the most dense sub-network of identical NDMC instruments (Network for the Detection of Mesospheric Change) can be found. With these instruments the mesopause temperature is derived each night. The data can be used for the investigation of the amount of energy which is transported by small-scale atmospheric waves, so called gravity waves—knowledge about the so-called Brunt-Väisälä frequency provided. Information about the variability of this parameter is provided here.
In the Alpine region, the most dense sub-network of identical NDMC instruments (Network for the...
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