Rodriguez Imazio, Paola and Mininni, Pablo and Godoy, Alejandro and Rivaben, Nicolas and Dörnbrack, Andreas (2023) Not all clear air turbulence is Kolmogorov - The fine-scale nature of atmospheric turbulence. Journal of Geophysical Research: Atmospheres, 128 (2), pp. 1-25. Wiley. doi: 10.1029/2022JD037491. ISSN 2169-897X.
![]() |
PDF
- Published version
4MB |
Official URL: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JD037491
Abstract
We study a strong clear air turbulence (CAT) event experienced by the German High-Altitude Long-Range research aircraft (HALO) during the Southern Hemisphere Transport, Dynamics, and Chemistry campaign. HALO encountered CAT leeward of the southern Andes Mountains, where tropospheric airflow favored vertically propagating mountain waves that were refracted southeastward into the core of tropopause jet. Turbulence is quantified using spectral quantities and structure functions computed from in situ 100 Hz flight level data. The detected CAT region exhibits strong patchiness, characterized by separated bursts in turbulent kinetic energy and energy dissipation rate. The high resolution in situ observations reveal different turbulent scaling within each patch, in both spectra and structure functions, and following Monin and Yaglom's conversion law. One patch follows power laws with exponents −1.71 ± 0.06, −1.771 ± 0.006, and −1.56 ± 0.05 for the velocity components w, v, and u, respectively, while another patch has exponents −2.17 ± 0.12, −2.50 ± 0.08, and −1.92 ± 0.09. These patches are mediated by a third patch with less clear scaling. While the patches can deviate from Kolmogorov scaling due to the anisotropy of the airflow, they still display evidence of CAT with enhanced energy dissipation rates.
Item URL in elib: | https://elib.dlr.de/193574/ | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Document Type: | Article | ||||||||||||||||||||||||
Title: | Not all clear air turbulence is Kolmogorov - The fine-scale nature of atmospheric turbulence | ||||||||||||||||||||||||
Authors: |
| ||||||||||||||||||||||||
Date: | 10 January 2023 | ||||||||||||||||||||||||
Journal or Publication Title: | Journal of Geophysical Research: Atmospheres | ||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||
Volume: | 128 | ||||||||||||||||||||||||
DOI: | 10.1029/2022JD037491 | ||||||||||||||||||||||||
Page Range: | pp. 1-25 | ||||||||||||||||||||||||
Publisher: | Wiley | ||||||||||||||||||||||||
ISSN: | 2169-897X | ||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||
Keywords: | clear air turbulence (CAT), Southern Andes, mountain waves | ||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||
HGF - Program: | Aeronautics | ||||||||||||||||||||||||
HGF - Program Themes: | Air Transportation and Impact | ||||||||||||||||||||||||
DLR - Research area: | Aeronautics | ||||||||||||||||||||||||
DLR - Program: | L AI - Air Transportation and Impact | ||||||||||||||||||||||||
DLR - Research theme (Project): | L - Climate, Weather and Environment | ||||||||||||||||||||||||
Location: | Oberpfaffenhofen | ||||||||||||||||||||||||
Institutes and Institutions: | Institute of Atmospheric Physics > Transport Meteorology | ||||||||||||||||||||||||
Deposited By: | Ziegele, Brigitte | ||||||||||||||||||||||||
Deposited On: | 25 Jan 2023 11:23 | ||||||||||||||||||||||||
Last Modified: | 26 Mar 2024 13:19 |
Repository Staff Only: item control page