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  Gravity wave influences on mesoscale divergence: An observational case study

Stephan, C. C., Lane, T., & Jacob, C. (2020). Gravity wave influences on mesoscale divergence: An observational case study. Journal of Geophysical Research: Atmospheres, 47: e2019GL086539. doi:10.1029/2019GL086539.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-8EB3-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-833C-4
Genre: Journal Article

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CStephan-2019-JGR.zip (Supplementary material), 9KB
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CStephan-2019-JGR.zip
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 Creators:
Stephan, Claudia C.1, Author              
Lane, Todd, Author
Jacob, Christian, Author
Affiliations:
1Cloud-wave Coupling, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, ou_3055164              

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 Abstract: Characteristics of tropospheric low‐frequency gravity waves are diagnosed in radiosonde soundings from the Tropical Warm Pool‐International Cloud Experiment (TWP‐ICE) near Darwin, Australia. The waves have typical vertical wavelengths of about 4 km, horizontal wavelengths of about 600 km and intrinsic periods of about 12 hours. These scales match those of the vertical, horizontal and temporal variability found in area‐averaged horizontal wind divergence over the same domain. Vertical profiles of divergence show wave‐like structures with variability of the order of 2× 10‐5s‐1 in the free troposphere. The results for Darwin are similar to previously reported observed mesoscale patterns of divergence/convergence over the tropical Atlantic. The findings imply that tropical divergence on spatial scales of a few hundred kilometers, which is known to influence the organization of convection, may be forced by gravity waves.

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Language(s): eng - English
 Dates: 2019-082020-01-032020-01-162020-01-16
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1029/2019GL086539
 Degree: -

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Title: Journal of Geophysical Research: Atmospheres
  Other : JGR-D
  Abbreviation : J. Geophys. Res. - D
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Geophysical Union
Pages: - Volume / Issue: 47 Sequence Number: e2019GL086539 Start / End Page: - Identifier: ISSN: 0148-0227
CoNE: https://pure.mpg.de/cone/journals/resource/991042728714264_1