双差分吸收激光雷达：一种能有效减小气溶胶对臭氧测量影响的方法

DUAL DIFFERENTIAL ABSORPTION LIDAR: A NEW METHOD TO REDUCE EFFECTIVELY THE EFFECT OF AEROSOLS ON OZONE MEASUREMENT

文中提出了一种新的激光雷达测量臭氧的方法：双差分吸收方法。理论分析和数值模拟表明这种方法可以有效减小气溶胶消光和后向散射对臭氧测量的影响，从而使激光雷达在气溶胶影响严重地区测量的臭氧精度比传统差分吸收激光雷达大大提高。利用（２８９，３１３；２７７．１，２９９．１ｎｍ）或（２６８．４，２８９；２７７．１，２９９．１ｎｍ）４波长进行双差分吸收可以用于对流层大气气溶胶含量丰富或分布不均匀地区臭氧的测量。利用（２９９．１，３４１．５；３０８，３５３ｎｍ）４波长进行双差分吸收可以对火山爆发后平流层臭氧进行较精确的测量。

The present paper describes the new method of ozone measurement, dual differential absorption lidar (dual-DIAL).Theoretical analysis and numerical simulation show that this method can effectively reduce the effect of aerosol extinction and backscattering on lidar ozone measurement.The accuracy of ozone measurement with this method is higher than conventional DIAL at the region where aerosol effect is heavy. The dualDIAL with (289, 313: 277. 1. 299. 1nm) wavelengths or (268. 4, 289: 277. 1, 299. 1nm) wavelengths can be used for ozone measurement in the region, where aerosol loading is high or distribution inhomogeneous in the troposphere. The dual-DIAL with (299. 1, 341. 5: 308, 353nm) wavelengths can be used for the measurement of stratospheric ozone after the volcanic eruption.