A TKE-Based Framework for Studying Disturbed Atmospheric Surface Layer Flows and Application to Vertical Velocity Variance Over Canopies
Abstract
We propose an approach to study disturbed surface layer flows based on a simplified form of the turbulent kinetic energy (TKE) budget equation (the reduced TKE budget), which can be represented by a two-dimensional phase space. The phase space provides a way to quantify relative contributions of shear and buoyancy production/destruction of TKE, as well as the local imbalance between local production and dissipation. In this framework, Monin-Obukhov Similarity Theory represents one possible approach to reduce the dimensionality of the phase space. We apply this framework to study the vertical velocity variance in the canonical surface layer and in the canopy roughness sublayer above the Amazon forest. Results reveal interesting insight into the behavior of the vertical velocity variance over forests, linking its magnitude to the imbalance between local production and dissipation of TKE.
- Authors:
-
[1];
[2];
- Univ. of California, Los Angeles, CA (United States)
- Federal Univ. of Parana, Curitiba (Brazil)
- Publication Date:
- Research Org.:
- Pennsylvania State Univ., University Park, PA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1539742
- Alternate Identifier(s):
- OSTI ID: 1459446
- Grant/Contract Number:
- SC0011075
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Volume: 45; Journal Issue: 13; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; Geology
Citation Formats
Chamecki, Marcelo, Dias, Nelson L., and Freire, Livia S. A TKE-Based Framework for Studying Disturbed Atmospheric Surface Layer Flows and Application to Vertical Velocity Variance Over Canopies. United States: N. p., 2018.
Web. doi:10.1029/2018gl077853.
Chamecki, Marcelo, Dias, Nelson L., & Freire, Livia S. A TKE-Based Framework for Studying Disturbed Atmospheric Surface Layer Flows and Application to Vertical Velocity Variance Over Canopies. United States. doi:10.1029/2018gl077853.
Chamecki, Marcelo, Dias, Nelson L., and Freire, Livia S. Tue .
"A TKE-Based Framework for Studying Disturbed Atmospheric Surface Layer Flows and Application to Vertical Velocity Variance Over Canopies". United States. doi:10.1029/2018gl077853. https://www.osti.gov/servlets/purl/1539742.
@article{osti_1539742,
title = {A TKE-Based Framework for Studying Disturbed Atmospheric Surface Layer Flows and Application to Vertical Velocity Variance Over Canopies},
author = {Chamecki, Marcelo and Dias, Nelson L. and Freire, Livia S.},
abstractNote = {We propose an approach to study disturbed surface layer flows based on a simplified form of the turbulent kinetic energy (TKE) budget equation (the reduced TKE budget), which can be represented by a two-dimensional phase space. The phase space provides a way to quantify relative contributions of shear and buoyancy production/destruction of TKE, as well as the local imbalance between local production and dissipation. In this framework, Monin-Obukhov Similarity Theory represents one possible approach to reduce the dimensionality of the phase space. We apply this framework to study the vertical velocity variance in the canonical surface layer and in the canopy roughness sublayer above the Amazon forest. Results reveal interesting insight into the behavior of the vertical velocity variance over forests, linking its magnitude to the imbalance between local production and dissipation of TKE.},
doi = {10.1029/2018gl077853},
journal = {Geophysical Research Letters},
number = 13,
volume = 45,
place = {United States},
year = {2018},
month = {6}
}
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Works referenced in this record:
Linking Meteorology, Turbulence, and Air Chemistry in the Amazon Rain Forest
journal, December 2016
- Fuentes, Jose D.; Chamecki, Marcelo; Nascimento dos Santos, Rosa Maria
- Bulletin of the American Meteorological Society, Vol. 97, Issue 12, p. 2329-2342