Atmospheric turbulence structure above urban nonhomogeneous surface
A new 21-meter eddy covariance tower is installed in the Meteorological observatory of Moscow State University in November 2019. It includes 3 levels with METEK sonic anemometers. The mast is located inside the urban area and makes it possible to analyze the structure of atmospheric turbulence in a...
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| Format: | Article |
| Language: | English |
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Russian Academy of Sciences, The Geophysical Center
2022-12-01
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| Series: | Russian Journal of Earth Sciences |
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| Online Access: | http://doi.org/10.2205/2022ES01SI11 |
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| author | Drozd I. Repina I. Gavrikov A. Stepanenko V. Artamonov A. Pashkin A. Varentsov A. |
| author_facet | Drozd I. Repina I. Gavrikov A. Stepanenko V. Artamonov A. Pashkin A. Varentsov A. |
| author_sort | Drozd I. |
| collection | DOAJ |
| description | A new 21-meter eddy covariance tower is installed in the Meteorological observatory of Moscow State University in November 2019. It includes 3 levels with METEK sonic anemometers. The mast is located inside the urban area and makes it possible to analyze the structure of atmospheric turbulence in a heterogeneous urban condition. The measurement data from November 2019 to May 2020 are processed. Turbulent fluctuations of the wind velocity components are found to increase with height within 20 meters above the surface. The turbulent kinetic energy is proportional to the square of the averaged horizontal wind speed. The drag coefficient is determined by the type of footprint surface, with a value of 0.08 and 0.05 for urbanized and vegetated surfaces, respectively. The "turbulent flux of heat flux" is reasonably well predicted by diagnostic relation with heat flux, skewness and standard deviation of vertical speed, suggesting significant contribution of coherent structures to turbulent fluxes. The daily amplitude of the temperature variance increases with the daily amplitude of the average temperature. The paper considers the conditions for the applicability of the Monin-Obukhov similarity theory to the calculation of turbulent fluxes over a heterogeneous urban landscape. |
| format | Article |
| id | doaj-art-b498e2a4e07b43f5bccf1e0da534340c |
| institution | Kabale University |
| issn | 1681-1208 |
| language | English |
| publishDate | 2022-12-01 |
| publisher | Russian Academy of Sciences, The Geophysical Center |
| record_format | Article |
| series | Russian Journal of Earth Sciences |
| spelling | doaj-art-b498e2a4e07b43f5bccf1e0da534340c2025-08-20T03:58:35ZengRussian Academy of Sciences, The Geophysical CenterRussian Journal of Earth Sciences1681-12082022-12-012251910.2205/2022ES01SI11Atmospheric turbulence structure above urban nonhomogeneous surfaceDrozd I.0Repina I.1Gavrikov A.2Stepanenko V.3Artamonov A.4Pashkin A.5Varentsov A.6Lomonosov Moscow State UniverisityInstitute of Atmospheric Physics named after. A.M. Obukhov RASShirshov Institute of Oceanology RASLomonosov Moscow State UniverisityA. M. Obukhov Institute of Atmospheric Physics RASA. M. Obukhov Institute of Atmospheric Physics RASLomonosov Moscow State UniverisityA new 21-meter eddy covariance tower is installed in the Meteorological observatory of Moscow State University in November 2019. It includes 3 levels with METEK sonic anemometers. The mast is located inside the urban area and makes it possible to analyze the structure of atmospheric turbulence in a heterogeneous urban condition. The measurement data from November 2019 to May 2020 are processed. Turbulent fluctuations of the wind velocity components are found to increase with height within 20 meters above the surface. The turbulent kinetic energy is proportional to the square of the averaged horizontal wind speed. The drag coefficient is determined by the type of footprint surface, with a value of 0.08 and 0.05 for urbanized and vegetated surfaces, respectively. The "turbulent flux of heat flux" is reasonably well predicted by diagnostic relation with heat flux, skewness and standard deviation of vertical speed, suggesting significant contribution of coherent structures to turbulent fluxes. The daily amplitude of the temperature variance increases with the daily amplitude of the average temperature. The paper considers the conditions for the applicability of the Monin-Obukhov similarity theory to the calculation of turbulent fluxes over a heterogeneous urban landscape.http://doi.org/10.2205/2022ES01SI11atmospheric turbulence urban climate drag coefficient Monin-Obukhov similarity theory turbulent statistics footprint |
| spellingShingle | Drozd I. Repina I. Gavrikov A. Stepanenko V. Artamonov A. Pashkin A. Varentsov A. Atmospheric turbulence structure above urban nonhomogeneous surface Russian Journal of Earth Sciences atmospheric turbulence urban climate drag coefficient Monin-Obukhov similarity theory turbulent statistics footprint |
| title | Atmospheric turbulence structure above urban nonhomogeneous surface |
| title_full | Atmospheric turbulence structure above urban nonhomogeneous surface |
| title_fullStr | Atmospheric turbulence structure above urban nonhomogeneous surface |
| title_full_unstemmed | Atmospheric turbulence structure above urban nonhomogeneous surface |
| title_short | Atmospheric turbulence structure above urban nonhomogeneous surface |
| title_sort | atmospheric turbulence structure above urban nonhomogeneous surface |
| topic | atmospheric turbulence urban climate drag coefficient Monin-Obukhov similarity theory turbulent statistics footprint |
| url | http://doi.org/10.2205/2022ES01SI11 |
| work_keys_str_mv | AT drozdi atmosphericturbulencestructureaboveurbannonhomogeneoussurface AT repinai atmosphericturbulencestructureaboveurbannonhomogeneoussurface AT gavrikova atmosphericturbulencestructureaboveurbannonhomogeneoussurface AT stepanenkov atmosphericturbulencestructureaboveurbannonhomogeneoussurface AT artamonova atmosphericturbulencestructureaboveurbannonhomogeneoussurface AT pashkina atmosphericturbulencestructureaboveurbannonhomogeneoussurface AT varentsova atmosphericturbulencestructureaboveurbannonhomogeneoussurface |