激光与光电子学进展, 2017, 54 (6): 062801, 网络出版: 2017-06-08  

天基、地基资料反演边界层高度比较

Comparison of Boundary Layer Heights Retrieved by Space-Based and Ground-Based Data
作者单位
兰州大学大气科学学院甘肃省干旱气候变化与减灾重点实验室, 半干旱气候变化教育部重点实验室, 甘肃 兰州 730000
摘要
以兰州大学半干旱气候与环境观测站(SACOL)为研究站点,利用该站微波辐射计资料、地基微脉冲激光雷达资料以及对应的星载CALIPSO(Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation)激光雷达(天基)资料反演边界层高度。微波辐射计温度资料采用气块法,微脉冲激光雷达后向散射信号资料采用曲线拟合法和小波变换法(Haar小波变换法与Mexican Hat小波变换法),CALIPSO Level 1散射廓线采用最大方差法与Mexican Hat小波变换法,同时利用Level 2气溶胶层产品获得边界层高度。相比于应用于微脉冲激光雷达资料,小波变换法在应用于CALIPSO Level 1资料时对小波振幅的初值更加敏感。对比三种资料反演的边界层高度,微波辐射计资料与微脉冲激光雷达资料的结果更加相近,且显示出明显的季节变化,夏季达到最大值,这也与CALIPSO Level 2的结果一致。但是利用CALIPSO Level 1资料得到的边界层高度随季节的变化不明显。
Abstract
This study aims to calculate the boundary layer height retrieved by ground-based micro-pulse lidar data, microwave radiometer data and lidar data (space-based) of corresponding space-borne CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) from the semi-arid climate observatory and laboratory of Lanzhou University (SACOL). Microwave radiometer data with parcel method, micro-pulse lidar backscatter data with curve fitting method and wavelet transform method (Haar wavelet transform method and Mexican Hat wavelet transform method), CALIPSO Level 1 scattering profile with maximum variance method and Mexican Hat wavelet transform method, and Level 2 aerosol layer product are used to calculate boundary layer height. When the wavelet transform method is used, the boundary layer height retrieved from CALIPSO Level 1 data is more sensitive to the initial value of wavelet amplitude than that from micro-pulse lidar data. For the retrieved boundary layer height, microwave radiometer data and micro-pulse lidar data are very close. The result shows apparent seasonal variation, and the boundary layer height reaches its maximum in summer. Which is the same as the retrieved result of CALIPSO Level 2 product. But the seasonal variation in boundary layer height retrieved by CALIPSO Level 1 data is not apparent.

李红, 杨毅, 党蕊君. 天基、地基资料反演边界层高度比较[J]. 激光与光电子学进展, 2017, 54(6): 062801. Li Hong, Yang Yi, Dang Ruijun. Comparison of Boundary Layer Heights Retrieved by Space-Based and Ground-Based Data[J]. Laser & Optoelectronics Progress, 2017, 54(6): 062801.

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