Journal metrics

Journal metrics

  • IF value: 3.248 IF 3.248
  • IF 5-year value: 3.650 IF 5-year 3.650
  • CiteScore value: 3.37 CiteScore 3.37
  • SNIP value: 1.253 SNIP 1.253
  • SJR value: 1.869 SJR 1.869
  • IPP value: 3.29 IPP 3.29
  • h5-index value: 47 h5-index 47
  • Scimago H index value: 60 Scimago H index 60
Volume 10, issue 12 | Copyright
Atmos. Meas. Tech., 10, 4601-4612, 2017
https://doi.org/10.5194/amt-10-4601-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 30 Nov 2017

Research article | 30 Nov 2017

Tomographic reconstruction of atmospheric gravity wave parameters from airglow observations

Rui Song1,2, Martin Kaufmann1, Jörn Ungermann1, Manfred Ern1, Guang Liu3, and Martin Riese1,2 Rui Song et al.
  • 1Institute of Energy and Climate Research, Stratosphere (IEK-7), Research Centre Jülich, 52425 Jülich, Germany
  • 2Institute for Atmospheric and Environmental Research, University of Wuppertal, 42119 Wuppertal, Germany
  • 3Key Laboratory of Digital Earth Sciences, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China

Abstract. Gravity waves (GWs) play an important role in the dynamics of the mesosphere and lower thermosphere (MLT). Therefore, global observations of GWs in the MLT region are of particular interest. The small scales of GWs, however, pose a major problem for the observation of GWs from space. We propose a new observation strategy for GWs in the mesopause region by combining limb and sub-limb satellite-borne remote sensing measurements for improving the spatial resolution of temperatures that are retrieved from atmospheric soundings. In our study, we simulate satellite observations of the rotational structure of the O2 A-band nightglow. A key element of the new method is the ability of the instrument or the satellite to operate in so-called target mode, i.e. to point at a particular point in the atmosphere and collect radiances at different viewing angles. These multi-angle measurements of a selected region allow for tomographic 2-D reconstruction of the atmospheric state, in particular of GW structures. The feasibility of this tomographic retrieval approach is assessed using simulated measurements. It shows that one major advantage of this observation strategy is that GWs can be observed on a much smaller scale than conventional observations. We derive a GW sensitivity function, and it is shown that target mode observations are able to capture GWs with horizontal wavelengths as short as  ∼50km for a large range of vertical wavelengths. This is far better than the horizontal wavelength limit of 100–200km obtained from conventional limb sounding.

Download & links
Publications Copernicus
Download
Short summary
Gravity waves (GWs) play an important role in atmospheric dynamics. In this work, we propose a new observation strategy for GWs in the mesopause region by combining limb and sub-limb satellite-borne remote sensing measurements for improving the spatial resolution of temperatures that are retrieved from atmospheric soundings. It shows that one major advantage of this observation strategy is that much smaller-scale GWs can be observed.
Gravity waves (GWs) play an important role in atmospheric dynamics. In this work, we propose a...
Citation
Share