期刊
ATMOSPHERIC MEASUREMENT TECHNIQUES
卷 10, 期 4, 页码 1609-1622出版社
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/amt-10-1609-2017
关键词
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资金
- Texas Commission of Environmental Quality (TCEQ)
- NASA DISCOVER-AQ project
Three algorithms for estimating the boundary layer heights are assessed: an aerosol gradient method, a cluster analysis method, and a Haar wavelet method. Over 40 daytime clear-sky radiosonde profiles are used to compare aerosol backscatter boundary layer heights retrieved by a Vaisala CL31 ceilometer. Overall good agreement between radiosonde-and aerosol-derived boundary layer heights was found for all methods. The cluster method was found to be particularly sensitive to noise in ceilometer signals and lofted aerosol layers (48.8% of comparisons), while the gradient method showed limitations in low-aerosol-backscatter conditions. The Haar wavelet method was demonstrated to be the most robust, only showing limitations in 22.5% of all observations. Occasional differences between thermodynamically and aerosol-derived boundary layer heights were observed.
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