Turbulent energy budget analysis based on coherent wind lidar observations
<p>The turbulent kinetic energy (TKE) budget terms, which collectively are a key physical quantity for describing the generation and dissipation processes of turbulence, are crucial for revealing the essence and characteristics of turbulence. Due to limitations in current observational methods...
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Copernicus Publications
2025-01-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://acp.copernicus.org/articles/25/441/2025/acp-25-441-2025.pdf |
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| author | J. Xian J. Xian Z. Qiu H. Luo Y. Hu X. Lin C. Lu Y. Yang H. Yang N. Zhang N. Zhang |
| author_facet | J. Xian J. Xian Z. Qiu H. Luo Y. Hu X. Lin C. Lu Y. Yang H. Yang N. Zhang N. Zhang |
| author_sort | J. Xian |
| collection | DOAJ |
| description | <p>The turbulent kinetic energy (TKE) budget terms, which collectively are a key physical quantity for describing the generation and dissipation processes of turbulence, are crucial for revealing the essence and characteristics of turbulence. Due to limitations in current observational methods, the generation and dissipation mechanisms of atmospheric turbulent energy are mainly based on ground or tower-based observations, and studies on the budget terms of TKE of vertical structures are lacking. We propose a new method for detecting TKE budget terms based on coherent wind lidar and compare it with data obtained with a three-dimensional ultrasonic anemometer. The results indicate that the error in the buoyancy generation term estimated by the wind lidar is relatively small, less than 0.00014 <span class="inline-formula">m<sup>2</sup> s<sup>−3</sup></span>, which verifies the accuracy and reliability of our method. We explore the generation and dissipation mechanisms of turbulence under different weather conditions, and find that the buoyancy generation term plays a role in dissipating TKE under low-cloud and light-rain conditions. During the day, turbulent transport and the dissipation rate are the main dissipation terms, while buoyancy generation is the main dissipation term at night. The results show that the proposed method can accurately capture the vertical distribution of TKE, the dissipation rate, shear generation, turbulent transport, and buoyancy generation terms in the boundary layer and can comprehensively reflect the influence of each budget term on the vertical structure of turbulent energy. This research provides a new perspective and method for studies of atmospheric turbulence, which can be further applied to fine observations of the vertical structure and dynamics of turbulence.</p> |
| format | Article |
| id | doaj-art-0c717b377b07429a9dd75f042e6c0ca6 |
| institution | Kabale University |
| issn | 1680-7316 1680-7324 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj-art-0c717b377b07429a9dd75f042e6c0ca62025-01-13T12:00:07ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242025-01-012544145710.5194/acp-25-441-2025Turbulent energy budget analysis based on coherent wind lidar observationsJ. Xian0J. Xian1Z. Qiu2H. Luo3Y. Hu4X. Lin5C. Lu6Y. Yang7H. Yang8N. Zhang9N. Zhang10School of Atmospheric Sciences, Nanjing University, Nanjing 210023, ChinaShenzhen National Climate Observatory, Meteorological Bureau of Shenzhen Municipality, Shenzhen 518040, ChinaShenzhen National Climate Observatory, Meteorological Bureau of Shenzhen Municipality, Shenzhen 518040, ChinaShenzhen National Climate Observatory, Meteorological Bureau of Shenzhen Municipality, Shenzhen 518040, ChinaShenzhen National Climate Observatory, Meteorological Bureau of Shenzhen Municipality, Shenzhen 518040, ChinaShenzhen National Climate Observatory, Meteorological Bureau of Shenzhen Municipality, Shenzhen 518040, ChinaShenzhen National Climate Observatory, Meteorological Bureau of Shenzhen Municipality, Shenzhen 518040, ChinaShenzhen National Climate Observatory, Meteorological Bureau of Shenzhen Municipality, Shenzhen 518040, ChinaShenzhen National Climate Observatory, Meteorological Bureau of Shenzhen Municipality, Shenzhen 518040, ChinaSchool of Atmospheric Sciences, Nanjing University, Nanjing 210023, ChinaKey Laboratory of Urban Meteorology, China Meteorological Administration, Beijing 100089, China<p>The turbulent kinetic energy (TKE) budget terms, which collectively are a key physical quantity for describing the generation and dissipation processes of turbulence, are crucial for revealing the essence and characteristics of turbulence. Due to limitations in current observational methods, the generation and dissipation mechanisms of atmospheric turbulent energy are mainly based on ground or tower-based observations, and studies on the budget terms of TKE of vertical structures are lacking. We propose a new method for detecting TKE budget terms based on coherent wind lidar and compare it with data obtained with a three-dimensional ultrasonic anemometer. The results indicate that the error in the buoyancy generation term estimated by the wind lidar is relatively small, less than 0.00014 <span class="inline-formula">m<sup>2</sup> s<sup>−3</sup></span>, which verifies the accuracy and reliability of our method. We explore the generation and dissipation mechanisms of turbulence under different weather conditions, and find that the buoyancy generation term plays a role in dissipating TKE under low-cloud and light-rain conditions. During the day, turbulent transport and the dissipation rate are the main dissipation terms, while buoyancy generation is the main dissipation term at night. The results show that the proposed method can accurately capture the vertical distribution of TKE, the dissipation rate, shear generation, turbulent transport, and buoyancy generation terms in the boundary layer and can comprehensively reflect the influence of each budget term on the vertical structure of turbulent energy. This research provides a new perspective and method for studies of atmospheric turbulence, which can be further applied to fine observations of the vertical structure and dynamics of turbulence.</p>https://acp.copernicus.org/articles/25/441/2025/acp-25-441-2025.pdf |
| spellingShingle | J. Xian J. Xian Z. Qiu H. Luo Y. Hu X. Lin C. Lu Y. Yang H. Yang N. Zhang N. Zhang Turbulent energy budget analysis based on coherent wind lidar observations Atmospheric Chemistry and Physics |
| title | Turbulent energy budget analysis based on coherent wind lidar observations |
| title_full | Turbulent energy budget analysis based on coherent wind lidar observations |
| title_fullStr | Turbulent energy budget analysis based on coherent wind lidar observations |
| title_full_unstemmed | Turbulent energy budget analysis based on coherent wind lidar observations |
| title_short | Turbulent energy budget analysis based on coherent wind lidar observations |
| title_sort | turbulent energy budget analysis based on coherent wind lidar observations |
| url | https://acp.copernicus.org/articles/25/441/2025/acp-25-441-2025.pdf |
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