Spatiotemporal Dynamics of the Kinetic Energy in the Atmospheric Boundary Layer from Minisodar Measurements
Spatiotemporal dynamics of the atmospheric kinetic energy and its components caused by the ordered and turbulent motions of air masses are estimated from minisodar measurements of three velocity vector components and their variances within the lowest 5–200 m layer of the atmosphere, with a particula...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/12/4/421 |
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| author | Alexander Potekaev Liudmila Shamanaeva Valentina Kulagina |
| author_facet | Alexander Potekaev Liudmila Shamanaeva Valentina Kulagina |
| author_sort | Alexander Potekaev |
| collection | DOAJ |
| description | Spatiotemporal dynamics of the atmospheric kinetic energy and its components caused by the ordered and turbulent motions of air masses are estimated from minisodar measurements of three velocity vector components and their variances within the lowest 5–200 m layer of the atmosphere, with a particular emphasis on the turbulent kinetic energy. The layered structure of the total atmospheric kinetic energy has been established. From the diurnal hourly dynamics of the altitude profiles of the turbulent kinetic energy (TKE) retrieved from minisodar data, four layers are established by the character of the altitude TKE dependence, namely, the near-ground layer, the surface layer, the layer with a linear TKE increase, and the transitive layer above. In the first layer, the most significant changes of the TKE were observed in the evening hours. In the second layer, no significant changes in the TKE values were observed. A linear increase in the TKE values with altitude was observed in the third layer. In the fourth layer, the TKE slightly increased with altitude and exhibited variations during the entire observation period. The altitudes of the upper boundaries of these layers depended on the time of day. The MKE values were much less than the corresponding TKE values, they did not exceed 50 m<sup>2</sup>/s<sup>2</sup>. From two to four MKE layers were distinguished based on the character of its altitude dependence. The two-layer structures were observed in the evening and at night (under conditions of the stable atmospheric boundary layer). In the morning and daytime, the four-layer MKE structures with intermediate layers of linear increase and subsequent decrease in the MKE values were observed. Our estimates demonstrated that the TKE contribution to the total atmospheric kinetic energy considerably (by a factor of 2.5–3) exceeded the corresponding MKE contribution. |
| first_indexed | 2024-03-10T12:53:55Z |
| format | Article |
| id | doaj.art-1fb08afc620542f0b288c7c8524f0983 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T12:53:55Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-1fb08afc620542f0b288c7c8524f09832023-11-21T12:01:32ZengMDPI AGAtmosphere2073-44332021-03-0112442110.3390/atmos12040421Spatiotemporal Dynamics of the Kinetic Energy in the Atmospheric Boundary Layer from Minisodar MeasurementsAlexander Potekaev0Liudmila Shamanaeva1Valentina Kulagina2Faculty of Radiophysics, National Research Tomsk State University, 634050 Tomsk, RussiaFaculty of Radiophysics, National Research Tomsk State University, 634050 Tomsk, RussiaFaculty of Medicine and Biology, Siberian State Medical University, 634050 Tomsk, RussiaSpatiotemporal dynamics of the atmospheric kinetic energy and its components caused by the ordered and turbulent motions of air masses are estimated from minisodar measurements of three velocity vector components and their variances within the lowest 5–200 m layer of the atmosphere, with a particular emphasis on the turbulent kinetic energy. The layered structure of the total atmospheric kinetic energy has been established. From the diurnal hourly dynamics of the altitude profiles of the turbulent kinetic energy (TKE) retrieved from minisodar data, four layers are established by the character of the altitude TKE dependence, namely, the near-ground layer, the surface layer, the layer with a linear TKE increase, and the transitive layer above. In the first layer, the most significant changes of the TKE were observed in the evening hours. In the second layer, no significant changes in the TKE values were observed. A linear increase in the TKE values with altitude was observed in the third layer. In the fourth layer, the TKE slightly increased with altitude and exhibited variations during the entire observation period. The altitudes of the upper boundaries of these layers depended on the time of day. The MKE values were much less than the corresponding TKE values, they did not exceed 50 m<sup>2</sup>/s<sup>2</sup>. From two to four MKE layers were distinguished based on the character of its altitude dependence. The two-layer structures were observed in the evening and at night (under conditions of the stable atmospheric boundary layer). In the morning and daytime, the four-layer MKE structures with intermediate layers of linear increase and subsequent decrease in the MKE values were observed. Our estimates demonstrated that the TKE contribution to the total atmospheric kinetic energy considerably (by a factor of 2.5–3) exceeded the corresponding MKE contribution.https://www.mdpi.com/2073-4433/12/4/421atmospheric boundary layerspatiotemporal dynamics of the atmospheric kinetic energyturbulenceminisodar measurements |
| spellingShingle | Alexander Potekaev Liudmila Shamanaeva Valentina Kulagina Spatiotemporal Dynamics of the Kinetic Energy in the Atmospheric Boundary Layer from Minisodar Measurements Atmosphere atmospheric boundary layer spatiotemporal dynamics of the atmospheric kinetic energy turbulence minisodar measurements |
| title | Spatiotemporal Dynamics of the Kinetic Energy in the Atmospheric Boundary Layer from Minisodar Measurements |
| title_full | Spatiotemporal Dynamics of the Kinetic Energy in the Atmospheric Boundary Layer from Minisodar Measurements |
| title_fullStr | Spatiotemporal Dynamics of the Kinetic Energy in the Atmospheric Boundary Layer from Minisodar Measurements |
| title_full_unstemmed | Spatiotemporal Dynamics of the Kinetic Energy in the Atmospheric Boundary Layer from Minisodar Measurements |
| title_short | Spatiotemporal Dynamics of the Kinetic Energy in the Atmospheric Boundary Layer from Minisodar Measurements |
| title_sort | spatiotemporal dynamics of the kinetic energy in the atmospheric boundary layer from minisodar measurements |
| topic | atmospheric boundary layer spatiotemporal dynamics of the atmospheric kinetic energy turbulence minisodar measurements |
| url | https://www.mdpi.com/2073-4433/12/4/421 |
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