Comparison of Atmospheric Boundary Layer Height Retrieved from Radiosonde and Groundbased Microwave Radiometer Measurements
Comparison of Atmospheric Boundary Layer Height Retrieved from Radiosonde and Groundbased Microwave Radiometer Measurements
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无线电探空仪和地基微波辐射计测量反演的大气边界层高度的比较
DOI：
10.1109/icmo49322.2019.9026100
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发表时间：
2019-12
期刊：
影响因子：
--
通讯作者：
Junli Jin
中科院分区：
文献类型：
--
作者：
Qing Zhou;Yong Zhang;Junli Jin
边界层高度（BLH）是表征大气边界层结构的一个重要参数，它决定了大气边界层内部湍流扩散和热动量交换的程度。本文利用2017年4月至2018年3月北京南方气象台地面微波辐射计和探空仪的同步观测数据，分别基于多元线性回归算法和体积Richardson数法估算BLH。比较了两种观测结果的BLH，并分析了北京地区BLH的时间变化。主要结论如下：1)MWR反演的BLH比探空平均高157 m；MWR与探空之间BLH的平均偏差在北京时间08、20时小于14时，春、夏季的偏差相对较小。2)从MWR和探空观测数据来看，08 BJT处的BLH普遍低于14 BJT和20 BJT处。(3)探空测得的BLH在5月份达到峰值，而水波反演的BLH在1、2月份达到最大值。(4)北京夜间BLH相对较低，在05、06 BJT前后达到最小值（平均为622\m}$）。bh在08 BJT后逐渐增大，在15 BJT左右达到最大值$（\sim 908\ mathm {m}$平均值）。
As an important parameter that characterizes the structure of Atmospheric boundary layer (ABL), the boundary layer height (BLH) determines the degree of turbulent diffusion and exchange of heat and momentum within ABL. In this paper, synchronized observations of ground-based microwave radiometer (MWR) and radiosonde in Beijing Southern Meteorological Observatory from April 2017 to March 2018 are obtained to estimate BLH, based on the multiple linear regression algorithm and bulk Richardson number method, respectively. The BLHs derived from the two observations are compared and the temporal variation of BLH in Beijing are finally analyzed. Main conclusions are as follows: 1) the BLH retrieved by MWR is higher than that obtained by radiosonde by 157 m on average. The average deviation of BLH between MWR and radiosonde is smaller at 08 Beijing time (BJT) and 20 BJT than at 14 BJT, and the deviation is relatively smaller in spring and summer than other seasons. 2) BLH at 08 BJT is generally lower than that at 14 BJT and 20 BJT from both MWR and radiosonde observations. 3) radiosonde-obtained BLH peaks in the May while MWR-retrieved BLH reaches maximum in January and February. 4) BLH in Beijing at night is relatively low, which reaches the minimum $(\sim 622\mathrm {m}$ on average) around 05 BJT or 06 BJT. BLH gradually increases after 08 BJT and reaches the maximum $( \sim 908\mathrm {m}$ on average) around 15 BJT.
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