Investigation of the Mixing Height in the Planetary Boundary Layer by Using Sodar and Microwave Radiometer Data

被引:7
|
作者
Odintsov, Sergey [1 ]
Miller, Eugene [2 ]
Kamardin, Andrey [1 ]
Nevzorova, Irina [1 ]
Troitsky, Arkady [3 ]
Schroeder, Mathias [4 ]
机构
[1] Russian Acad Sci, AVE Zuev Inst Atmospher Opt, Siberian Branch, Tomsk 634055, Russia
[2] RPO ATTEX Ltd, Dolgoprudnyi 141700, Russia
[3] NI Lobachevsky State Univ Nizhny Novgorod, Radiophys Res Inst, Nizhnii Novgorod 603950, Russia
[4] IfU GmbH Private Inst Environm Anal, D-09244 Lichtenau, Germany
关键词
planetary boundary layer; sodar; MWR; mixing height; temperature inversion; TURBULENT HEAT-EXCHANGE; IN-SITU; DOME C; RADIOSONDE; LIDAR; TEMPERATURE; VARIABILITY; REGION;
D O I
10.3390/environments8110115
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The height of the mixing layer is a significant parameter for describing the dynamics of the planetary boundary layer (PBL), especially for air quality control and for the parametrizations in numerical modeling. The problem is that the heights of the mixing layer cannot be measured directly. The values of this parameter are depending both on the applied algorithms for calculation and on the measuring instruments which have been used by the data source. To determine the height of a layer of intense turbulent heat exchange, data were used from acoustic meteorological locator (sodar) and from a passive single-channel scanning microwave radiometer MTP-5 (MWR) to measure the temperature profile in a layer of up to 1 km. Sodar can provide information on the structure of temperature turbulence in the PBL directly. These data have been compared with the mixing layer height calculated with the Parcel method by using the MTP-5 data. For the analysis, July and September 2020 were selected in the city of Tomsk in Siberia as characteristic periods of mid-summer and the transition period to autumn. The measurement results, calculations and inter-comparisons are shown and discussed in this work. During temperature inversions in the boundary layer, it was observed that turbulent heat transfer (increased dispersion of air temperature) is covering the inversion layers and the overlying ones. Moreover, this phenomenon is not only occurring during the morning destruction of inversions, but also in the process of their formation and development.
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页数:15
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