Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.509 IF 5.509
  • IF 5-year value: 5.689 IF 5-year 5.689
  • CiteScore value: 5.44 CiteScore 5.44
  • SNIP value: 1.519 SNIP 1.519
  • SJR value: 3.032 SJR 3.032
  • IPP value: 5.37 IPP 5.37
  • h5-index value: 86 h5-index 86
  • Scimago H index value: 161 Scimago H index 161
Volume 18, issue 21 | Copyright

Special issue: Layered phenomena in the mesopause region (ACP/AMT inter-journal...

Atmos. Chem. Phys., 18, 16051-16061, 2018
https://doi.org/10.5194/acp-18-16051-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 08 Nov 2018

Research article | 08 Nov 2018

Solar and lunar tides in noctilucent clouds as determined by ground-based lidar

Jens Fiedler and Gerd Baumgarten Jens Fiedler and Gerd Baumgarten
  • Leibniz Institute of Atmospheric Physics, Rostock University, Kühlungsborn, Germany

Abstract. Noctilucent clouds (NLCs) occur during summer from midlatitudes to high latitudes. They consist of nanometer-sized ice particles in an altitude range from 80 to 90km and are sensitive to ambient temperature and water vapor content, which makes them a suitable tracer for variability on all timescales. The data set acquired by the ALOMAR Rayleigh–Mie–Raman (RMR) lidar covers 21 years and is investigated regarding tidal signatures in NLCs. For the first time solar and lunar tidal parameters in NLCs were determined simultaneously from the same data. Several NLC parameters are subject to persistent mean variations throughout the solar day as well as the lunar day. Variations with lunar time are generally smaller compared to variations with solar time. NLC occurrence frequency shows the most robust imprint of the lunar semidiurnal tide. Its amplitude is about 50% of the solar semidiurnal tide, which is surprisingly large. Phase progressions of NLC occurrence frequency indicate upward propagating solar tides. Below 84km altitude the corresponding vertical wavelengths are between 20 and 30km. For the lunar semidiurnal tide phase progressions vary symmetrically with respect to the maximum of the NLC layer.

Publications Copernicus
Special issue
Download
Short summary
Ice particles of noctilucent clouds (NLCs) are used as a tracer to investigate tidal signatures in the altitude range from 80 to 90 km. For the first time solar and lunar tidal parameters in NLCs were determined simultaneously from the same data set. Solar variations are dominated by diurnal and semidiurnal tidal components. For NLC occurrence the lunar semidiurnal amplitude is approx. 50 % of the solar semidiurnal amplitude. Phases of solar components indicate upward propagating tides.
Ice particles of noctilucent clouds (NLCs) are used as a tracer to investigate tidal signatures...
Citation
Share