CaltechAUTHORS
  A Caltech Library Service

Transition from geostrophic turbulence to inertia–gravity waves in the atmospheric energy spectrum

Callies, Jörn and Ferrari, Raffaele and Bühler, Oliver (2014) Transition from geostrophic turbulence to inertia–gravity waves in the atmospheric energy spectrum. Proceedings of the National Academy of Sciences of the United States of America, 111 (48). pp. 17033-17038. ISSN 0027-8424. PMCID PMC4260586. https://resolver.caltech.edu/CaltechAUTHORS:20180112-085941209

[img] PDF - Published Version
See Usage Policy.

723Kb
[img] PDF (Data Supplement) - Supplemental Material
See Usage Policy.

116Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20180112-085941209

Abstract

Midlatitude fluctuations of the atmospheric winds on scales of thousands of kilometers, the most energetic of such fluctuations, are strongly constrained by the Earth’s rotation and the atmosphere’s stratification. As a result of these constraints, the flow is quasi-2D and energy is trapped at large scales—nonlinear turbulent interactions transfer energy to larger scales, but not to smaller scales. Aircraft observations of wind and temperature near the tropopause indicate that fluctuations at horizontal scales smaller than about 500 km are more energetic than expected from these quasi-2D dynamics. We present an analysis of the observations that indicates that these smaller-scale motions are due to approximately linear inertia–gravity waves, contrary to recent claims that these scales are strongly turbulent. Specifically, the aircraft velocity and temperature measurements are separated into two components: one due to the quasi-2D dynamics and one due to linear inertia–gravity waves. Quasi-2D dynamics dominate at scales larger than 500 km; inertia–gravity waves dominate at scales smaller than 500 km.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1073/pnas.1410772111DOIArticle
http://www.pnas.org/content/111/48/17033PublisherArticle
http://www.pnas.org/lookup/suppl/doi:10.1073/pnas.1410772111/-/DCSupplementalPublisherSupporting Information
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4260586/PubMed CentralArticle
ORCID:
AuthorORCID
Callies, Jörn0000-0002-6815-1230
Ferrari, Raffaele0000-0003-1895-4294
Additional Information:© 2014 National Academy of Sciences. Freely available online through the PNAS open access option. Edited by Kerry A. Emanuel, Massachusetts Institute of Technology, Cambridge, MA, and approved October 17, 2014 (received for review June 14, 2014). Published ahead of print November 17, 2014. We thank the principal investigators of the MOZAIC project, the European Commission for supporting the MOZAIC project, ETHER [Centre National d’Etudes Spatiales (CNES)–CNRS/Institut National des Sciences de l’Univers (INSU)] for hosting the database, and the participating airliners for transporting the instrumentation free of charge. J.C. and R.F. thank Glenn Flierl for offering useful feedback during the preparation of the manuscript and acknowledge financial support under Grants ONR-N-00014-09-1-0458 and NSF-CMG-1024198. O.B. gratefully acknowledges financial support under Grants NSF-CMG-1024180, NSF-DMS-1312159, and NSF-DMS-1009213. Author contributions: J.C. designed research; J.C., R.F., and O.B. performed research; J.C. analyzed data; and J.C., R.F., and O.B. wrote the paper. The authors declare no conflict of interest. This Direct Submission article had a prearranged editor. This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1410772111/-/DCSupplemental.
Funders:
Funding AgencyGrant Number
Office of Naval Research (ONR)N-00014-09-1-0458
NSFCMG-1024198
NSFCMG-1024180
NSFDMS-1312159
NSFDMS-1009213
Subject Keywords:meteorology; atmospheric dynamics; geostrophic turbulence; inertia–gravity waves
Issue or Number:48
PubMed Central ID:PMC4260586
Record Number:CaltechAUTHORS:20180112-085941209
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180112-085941209
Official Citation:Jörn Callies, Raffaele Ferrari, and Oliver Buhler. Transition from geostrophic turbulence to inertia–gravity waves in the atmospheric energy spectrum. PNAS 2014 111 (48) 17033-17038; published ahead of print November 17, 2014, doi:10.1073/pnas.1410772111
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84289
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:12 Jan 2018 17:14
Last Modified:09 Oct 2019 19:31

Repository Staff Only: item control page