Retrieval and Analysis of Atmospheric Temperature Using a Rotational Raman Lidar Observation
LIU Yu-li1,2, XIE Chen-bo1*, SHANG Zhen1, ZHAO Ming1, CAO Kai-fa1, SUN Yue-sheng2
1. Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China 2. Department of Physics, Electronic Engineering Institute of PLA, Hefei 230037, China
Abstract：Due to the existence of the aerosol, the traditional method of measuring atmospheric temperature by using Rayleigh scattering technique has limitations in the low altitude. A pure rotational Raman lidar to get tropospheric temperature profiles is built. We carried out the atmospheric temperature observation in Beijing for two months. The atmospheric temperature profile was retrieved using the observed rotational Raman scattering signals. The effect of smooth window, calibration range and calibration constant on the retrieval precision of the atmospheric temperature was evaluated and analyzed. The results show that with the increase of smooth window, the mean absolute deviation between the lidar and radiosonde firstly decreases and then increases; in order to remove effectively the effect of random error in the return signals, while maintaining the fine vertical structure of temperature profile, it is better to choose the range between 600 and 1 200 m for smooth window. When calibration range is different, the mean absolute deviation between the lidar and radiosonde is varied, the relative variation of the deviation is about 0.07 K. When both calibration constant a and b increase or decrease, the mean deviation between the lidar and radiosonde increases; when one increases and another decreases, the mean deviation has a tendency to cancel each other out. The variance probability of a or b is not equal, and the variance of a and b is always contrary in the sign; the mean deviation is not sensitive to variance of a or b, and it is sensitive to the whole variance of a and b, about 91.7% of the mean deviation is in the range between -3 and 3 K. These results provide the theoretical basis for the selection of smooth window and calibration range in pure rotational Raman lidar data retrieval, and the reference for the error of actual temperature inversion result caused by lidar calibration constant.
刘玉丽1,2，谢晨波1*，尚 震1，赵 明1，曹开法1，孙越胜2. 基于纯转动拉曼谱线激光雷达的大气温度反演分析[J]. 光谱学与光谱分析, 2016, 36(06): 1978-1986.
LIU Yu-li1,2, XIE Chen-bo1*, SHANG Zhen1, ZHAO Ming1, CAO Kai-fa1, SUN Yue-sheng2. Retrieval and Analysis of Atmospheric Temperature Using a Rotational Raman Lidar Observation. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(06): 1978-1986.
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