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Title: 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:
ORCiD logo [1]; ORCiD logo [2];  [2]
  1. Univ. of California, Los Angeles, CA (United States)
  2. 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 referencing / citing this record:

    Rate of decay of turbulent kinetic energy in abruptly stabilized Ekman boundary layers
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    Rate of decay of turbulent kinetic energy in abruptly stabilized Ekman boundary layers
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    Effects of Path Averaging in a Sonic Anemometer on the Estimation of Turbulence-Kinetic-Energy Dissipation Rates
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