光学学报, 2015, 35 (s1): s101001, 网络出版: 2015-07-27   

相干多普勒激光雷达观测渤黄海海洋大气边界层高度研究

Coherent Doppler Lidar Observations of Marine Atmospheric Boundary Layer Height in the Bohai and Yellow Sea
作者单位
中国海洋大学信息科学与工程学院, 山东 青岛 266100
摘要
2014年4月27日至2014年5月19日在“国家自然科学基金委2014年渤黄海共享航次春季航次”中,中国海洋大学利用自行研制的相干多普勒激光雷达在渤黄海32oN~40oN,118.5oE~125.3oE区域内观测海上大气边界层结构。相干多普勒激光雷达垂直指向发射激光和接收回波时,利用不同高度距离库内快速傅里叶变换谱的峰值计算了信号的信噪比,基于梯度法从信噪比廓线数据反演和提取大气边界层高度。该结果与同步的探空仪数据、Vaisala商业化的CL31型云高仪边界层高度进行对比,相干多普勒激光雷达结果与探空仪位温数据提取结果的相关性为79%,标准差为610 m;相干多普勒激光雷达与探空仪相对湿度数据提取结果的相关性为90%,标准差为370 m;相干多普勒激光雷达与云高仪获取结果的相关性为94%,标准差为320 m。
Abstract
During the National Natural Science Foundation of China open cruise of the R/V Dongfanghong-2 (NSFC 41349901), coherent Doppler lidar developed by Ocean University of China is used to observe atmospheric boundary layer structure in the Bohai and Yellow Sea. Lidar measurement is operated in the region between 32oN~40oN and 118.5oE~125.3oE, from April 27 to May 19, 2014. Lidar transmits the laser pulse to the atmosphere and receives its backscattering echo signals. Signal to noise ratio is calculated for each range bin of fast Fourier transform spectrum. The marine atmospheric boundary layer height is retrieved according to the minimum of gradient of signal to noise ratio profile. Comparisons between coherent Doppler lidar retrieval and synchronous radiosonde profiling, Vaisala CL31 laser ceilometer data show a good agreement between each other. Correlation of lidar results with radiosonde potentail temperature data is 79% with a standard deviation of 610 m. Correlation of lidar and radiosonde relative humidity data is 90% with a standard deviation of 370 m. And the correlation of lidar and ceilometer data is 94% with a standard deviation of 320 m.

王东祥, 宋小全, 冯长中, 王希涛, 吴松华. 相干多普勒激光雷达观测渤黄海海洋大气边界层高度研究[J]. 光学学报, 2015, 35(s1): s101001. Wang Dongxiang, Song Xiaoquan, Feng Changzhong, Wang Xitao, Wu Songhua. Coherent Doppler Lidar Observations of Marine Atmospheric Boundary Layer Height in the Bohai and Yellow Sea[J]. Acta Optica Sinica, 2015, 35(s1): s101001.

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