Comparison of the Mixing Layer Height Determination Methods using Lidar and Microwave Radiometer

YANG Fuyan;ZHANG Ning;ZHU Liangfang;ZHU Yan

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Plateau Meteorology
Plateau Meteorology ›› 2016, Vol. 35 ›› Issue (4) : 1102-1111. DOI: 10.7522/j.issn.1000-0534.2015.00045

Comparison of the Mixing Layer Height Determination Methods using Lidar and Microwave Radiometer

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Abstract

Methods for determining the mixing layer height based on a lidar and a microwave radiometer were compared during four sunny days (on 4, 7, 18 January and 4 February, 2010) in Suzhou. The observed mixing layer height varied between 300 m and 1500 m. The gradient method, the standard deviation method and the wavelet method were applied to extracting the mixing layer height from the lidar. Results showed that the three methods can determine the mixing layer height well and have a good agreement among them, the differences mainly occurred during the development and disappearance of the mixing layer, results by the gradient method and the wavelet method show little difference, while the standard deviation method results are slightly higher than others. The results determined by the temperature gradient method using microwave radiometer data were compared with the results determined using the lidar observations; there was a good correlation between the results and the correlation coefficient was 0.76. The results from the lidar were higher than these from microwave observations. The difference between the two observation devices was because of the different detection principles, especially in the development and dissipation stage of the boundary layer.

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Mixing layer height / Lidar / Microwave radiometer / Atmospheric boundary

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YANG Fuyan , ZHANG Ning , ZHU Liangfang , ZHU Yan. Comparison of the Mixing Layer Height Determination Methods using Lidar and Microwave Radiometer. Plateau Meteorology. 2016, 35(4): 1102-1111 https://doi.org/10.7522/j.issn.1000-0534.2015.00045

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