Comparison of simulated and observed convective gravity waves

S. Kalisch, H. Y. Chun, M. Ern, P. Preusse, Q. T. Trinh, S. D. Eckermann, M. Riese

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Gravity waves (GWs) from convection have horizontal wavelengths typically shorter than 100 km. Resolving these waves in state-of-the-art atmospheric models still remains challenging. Also, their time-dependent excitation process cannot be represented by a common GW drag parametrization with static launch distribution. Thus, the aim of this paper is to investigate the excitation and three-dimensional propagation of GWs forced by deep convection in the troposphere and estimate their influence on the middle atmosphere. For that purpose, the GW ray tracer Gravity-wave Regional Or Global Ray Tracer (GROGRAT) has been coupled to the Yonsei convective GW source model. The remaining free model parameters have been constrained by measurements. This work led to a coupled convective GW model representing convective GWs forced from small cells of deep convection up to large-scale convective clusters. In order to compare our simulation results with observed global distributions of momentum flux, limitations of satellite instruments were taken into account: The observational filter of a limb-viewing satellite instrument restricts measurements of GWs to waves with horizontal wavelengths longer than 100 km. Convective GWs, however, often have shorter wavelengths. This effect is taken into account when comparing simulated and observable GW spectra. We find good overall agreement between simulated and observed GW global distributions, if superimposed with a nonorographic background spectrum for higher-latitude coverage. Our findings indicate that parts of the convective GW spectrum can indeed be observed by limb-sounding satellites.

Original languageEnglish
Pages (from-to)474-492
Number of pages19
JournalJournal of Geophysical Research: Atmospheres
Volume121
Issue number22
DOIs
Publication statusPublished - 2016 Nov 27

Fingerprint

Gravity waves
gravity waves
gravity
gravity wave
satellite instruments
wavelengths
convection
wave spectrum
Satellites
limbs
wavelength
comparison
Wavelength
tracers
limb
tracer techniques
satellite sounding
rays
tracer
wave drag

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)
  • Palaeontology

Cite this

Kalisch, S., Chun, H. Y., Ern, M., Preusse, P., Trinh, Q. T., Eckermann, S. D., & Riese, M. (2016). Comparison of simulated and observed convective gravity waves. Journal of Geophysical Research: Atmospheres, 121(22), 474-492. https://doi.org/10.1002/2016JD025235
Kalisch, S. ; Chun, H. Y. ; Ern, M. ; Preusse, P. ; Trinh, Q. T. ; Eckermann, S. D. ; Riese, M. / Comparison of simulated and observed convective gravity waves. In: Journal of Geophysical Research: Atmospheres. 2016 ; Vol. 121, No. 22. pp. 474-492.
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Kalisch, S, Chun, HY, Ern, M, Preusse, P, Trinh, QT, Eckermann, SD & Riese, M 2016, 'Comparison of simulated and observed convective gravity waves', Journal of Geophysical Research: Atmospheres, vol. 121, no. 22, pp. 474-492. https://doi.org/10.1002/2016JD025235

Comparison of simulated and observed convective gravity waves. / Kalisch, S.; Chun, H. Y.; Ern, M.; Preusse, P.; Trinh, Q. T.; Eckermann, S. D.; Riese, M.

In: Journal of Geophysical Research: Atmospheres, Vol. 121, No. 22, 27.11.2016, p. 474-492.

Research output: Contribution to journalArticle

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T1 - Comparison of simulated and observed convective gravity waves

AU - Kalisch, S.

AU - Chun, H. Y.

AU - Ern, M.

AU - Preusse, P.

AU - Trinh, Q. T.

AU - Eckermann, S. D.

AU - Riese, M.

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