Investigation of non-equilibrium turbulence decay in the atmospheric boundary layer using Doppler lidar measurements
<p>This work concerns analysis of turbulence in the atmospheric boundary layer (ABL) shortly before and after sunset. Based on a large set of Doppler lidar measurements at rural and urban sites, we analyze frequency spectra of vertical wind at different heights and show that they increasingl...
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Copernicus Publications
2024-11-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/24/13231/2024/acp-24-13231-2024.pdf |
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| author | M. Karasewicz M. Wacławczyk P. Ortiz-Amezcua Ł. Janicka P. Poczta P. Poczta C. Kassar Borges I. S. Stachlewska |
| author_facet | M. Karasewicz M. Wacławczyk P. Ortiz-Amezcua Ł. Janicka P. Poczta P. Poczta C. Kassar Borges I. S. Stachlewska |
| author_sort | M. Karasewicz |
| collection | DOAJ |
| description | <p>This work concerns analysis of turbulence in the atmospheric boundary layer (ABL) shortly before and after sunset. Based on a large set of Doppler lidar measurements at rural and urban sites, we analyze frequency spectra of vertical wind at different heights and show that they increasingly deviate from Kolmogorov's <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">5</mn><mo>/</mo><mn mathvariant="normal">3</mn></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="28pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="c010f45c8d9a823a56ed826ff72bac29"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-24-13231-2024-ie00001.svg" width="28pt" height="14pt" src="acp-24-13231-2024-ie00001.png"/></svg:svg></span></span> prediction in the measured low-wavenumber part of the inertial range. We find that before sunset, the integral length scales tend to decrease with time. These findings contrast with a classical model of equilibrium decay of isotropic turbulence, which predicts that the scaling exponent should remain constant and equal to <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">5</mn><mo>/</mo><mn mathvariant="normal">3</mn></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="28pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="fa0e74ec8cb07aa6650e6f2d65de63f0"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-24-13231-2024-ie00002.svg" width="28pt" height="14pt" src="acp-24-13231-2024-ie00002.png"/></svg:svg></span></span> and the integral length scale should increase in time. We explain the observations using recent theories of non-equilibrium turbulence. The presence of non-equilibrium suggests that classical parametrization schemes fail to predict turbulence statistics shortly before sunset. By comparing the classical and the non-equilibrium models, we conclude that the former may underestimate the dissipation rate of turbulence kinetic energy in the initial stages of decay.</p> |
| format | Article |
| id | doaj-art-d7f21360983e4c2aa96d478e70571c74 |
| institution | OA Journals |
| issn | 1680-7316 1680-7324 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Copernicus Publications |
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| series | Atmospheric Chemistry and Physics |
| spelling | doaj-art-d7f21360983e4c2aa96d478e70571c742025-08-20T02:07:09ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242024-11-0124132311325110.5194/acp-24-13231-2024Investigation of non-equilibrium turbulence decay in the atmospheric boundary layer using Doppler lidar measurementsM. Karasewicz0M. Wacławczyk1P. Ortiz-Amezcua2Ł. Janicka3P. Poczta4P. Poczta5C. Kassar Borges6I. S. Stachlewska7Institute of Geophysics, Faculty of Physics, University of Warsaw, Pasteura 5, Warsaw, PolandInstitute of Geophysics, Faculty of Physics, University of Warsaw, Pasteura 5, Warsaw, PolandInstitute of Geophysics, Faculty of Physics, University of Warsaw, Pasteura 5, Warsaw, PolandInstitute of Geophysics, Faculty of Physics, University of Warsaw, Pasteura 5, Warsaw, PolandInstitute of Geophysics, Faculty of Physics, University of Warsaw, Pasteura 5, Warsaw, PolandLaboratory of Bioclimatology, Faculty of Environmental and Mechanical Engineering, Poznań University of Life Sciences, Piątkowska 94, Poznań, PolandInstitute of Geophysics, Faculty of Physics, University of Warsaw, Pasteura 5, Warsaw, PolandInstitute of Geophysics, Faculty of Physics, University of Warsaw, Pasteura 5, Warsaw, Poland<p>This work concerns analysis of turbulence in the atmospheric boundary layer (ABL) shortly before and after sunset. Based on a large set of Doppler lidar measurements at rural and urban sites, we analyze frequency spectra of vertical wind at different heights and show that they increasingly deviate from Kolmogorov's <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M1" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">5</mn><mo>/</mo><mn mathvariant="normal">3</mn></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="28pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="c010f45c8d9a823a56ed826ff72bac29"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-24-13231-2024-ie00001.svg" width="28pt" height="14pt" src="acp-24-13231-2024-ie00001.png"/></svg:svg></span></span> prediction in the measured low-wavenumber part of the inertial range. We find that before sunset, the integral length scales tend to decrease with time. These findings contrast with a classical model of equilibrium decay of isotropic turbulence, which predicts that the scaling exponent should remain constant and equal to <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">5</mn><mo>/</mo><mn mathvariant="normal">3</mn></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="28pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="fa0e74ec8cb07aa6650e6f2d65de63f0"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-24-13231-2024-ie00002.svg" width="28pt" height="14pt" src="acp-24-13231-2024-ie00002.png"/></svg:svg></span></span> and the integral length scale should increase in time. We explain the observations using recent theories of non-equilibrium turbulence. The presence of non-equilibrium suggests that classical parametrization schemes fail to predict turbulence statistics shortly before sunset. By comparing the classical and the non-equilibrium models, we conclude that the former may underestimate the dissipation rate of turbulence kinetic energy in the initial stages of decay.</p>https://acp.copernicus.org/articles/24/13231/2024/acp-24-13231-2024.pdf |
| spellingShingle | M. Karasewicz M. Wacławczyk P. Ortiz-Amezcua Ł. Janicka P. Poczta P. Poczta C. Kassar Borges I. S. Stachlewska Investigation of non-equilibrium turbulence decay in the atmospheric boundary layer using Doppler lidar measurements Atmospheric Chemistry and Physics |
| title | Investigation of non-equilibrium turbulence decay in the atmospheric boundary layer using Doppler lidar measurements |
| title_full | Investigation of non-equilibrium turbulence decay in the atmospheric boundary layer using Doppler lidar measurements |
| title_fullStr | Investigation of non-equilibrium turbulence decay in the atmospheric boundary layer using Doppler lidar measurements |
| title_full_unstemmed | Investigation of non-equilibrium turbulence decay in the atmospheric boundary layer using Doppler lidar measurements |
| title_short | Investigation of non-equilibrium turbulence decay in the atmospheric boundary layer using Doppler lidar measurements |
| title_sort | investigation of non equilibrium turbulence decay in the atmospheric boundary layer using doppler lidar measurements |
| url | https://acp.copernicus.org/articles/24/13231/2024/acp-24-13231-2024.pdf |
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