珠三角地区一次灰霾天气过程激光雷达观测与分析

大气与环境光学学报 ›› 2013, Vol. 8 ›› Issue (2): 114-123.

珠三角地区一次灰霾天气过程激光雷达观测与分析

黄祖照1, 董云升2*, 刘建国2, 刘文清2, 陆亦怀2, 赵雪松2, 张天舒2, 李铁3

(1 广州市环境监测中心站, 广东广州 510030；
2 中国科学院安徽光学精密机械研究所, 安徽合肥　230031；
3 西安机电信息技术研究所机电动态控制重点实验室, 陕西西安 710065)

收稿日期:2012-10-25 修回日期:2012-11-27 发布日期:2013-03-07
通讯作者: 黄祖照（1964-），男，广东肇庆人，高级工程师，长期从事城市空气质量研究方向工作. E-mail:huangzhao@126.com
作者简介:黄祖照（1964-），男，广东肇庆人，高级工程师，长期从事城市空气质量研究方向工作.
基金资助:
国家863计划（2009AA06A311）,合肥物质研究院青年人才基金（Y03RC11122）资助

Observation and Analysis of a Haze Process in Perl River Delta Region Using Lidar

HUANG Zu-zhao1, DONG Yun-sheng2*, LIU Jian-guo2, LIU Wen-qing2, LU Yi-huai2, ZHAO Xue-song2, ZHANG Tian-shu2, LI Tie3

(1 Guangzhou Environmental Monitoring Center, Guangzhou 510030, China;
2 Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
3 Science and Technology on Electromechanical Dynamic Control Labortory, Xi'an Institute of Electromechanical Technology Information, Xi'an 710065, China)

Received:2012-10-25 Revised:2012-11-27 Online:2013-03-07

摘要/Abstract

摘要：

利用拉曼米散射偏振激光雷达对2009年11月珠江三角洲地区出现的一次灰霾天气过程进行了观测研究，对颗粒物的光学性质和物理参数进行了分析。灰霾发生期间，颗粒物主要分布在1.5 km以下，其中0.6~1 km高度的浓度较大。灰霾发生前期，颗粒物在532 nm波长退偏比为0.2，Ångström指数和雷达比分别为1±0.4和 40±8 sr，表明灰霾颗粒物中有大量非球形粒子，粒径大，符合一次污染源排放的颗粒物特征；11月25日后，颗粒物在532 nm波长退偏比逐渐变小至0.07±0.02，Ångström指数为1.5±0.6，激光雷达比为56±12 sr，说明颗粒物多为球形粒子，细粒子占比较大。观察结果表明，前期轻度灰霾天气期间，颗粒物主要为人为源污染源排放，为大气复合污染提供了条件，随着污染物不断聚集，25日后二次颗粒物大量生成，加剧了灰霾污染。

关键词: 激光雷达, 大气颗粒物, 灰霾, 消光系数, 退偏振比

Abstract:

Aerosol optical and microphysical parameters of particles under severe haze polluted condition in the Pearl River Delta (PRD) in Southern China in November 2009 were observed by using Raman-Mie polarized lidar. It was found that the haze layer was distributed below 1.5 km, and the concentration of haze layer was comparatively thicker at the heigh of 600~1000 m, the characteristics of dust haze were analyzed and discussed. In the beginning, the depolarization ratio in 532nm wavelength is 0.2, Ångström exponent and lidar ratio of the haze were 1±0.4 and 40±8 sr, respectively. It meant that there was a large number of non-spherical particles and large size particles in the haze particles, it was in line with characteristics of anthropogenic emissions particles. After November 26, 2009, the depolarization ratio in 532 nm wavelength of haze particles gradually decreases to 0.07 ± 0.02, Ångström exponent and lidar ratio also changed to 1.5±0.6 and 56±12 sr, respectively. It was proved that there was a larger proportion of fine particles in haze, and the particles were mostly spherical particles. It meant that a large number of the second particles were generated after November 25, which aggravated the haze pollution. The result indicated that at the beginning, some artificial particles resulted in the light haze, these artificial source provided the condition for compound air pollution, with the second particle generating, the haze pollution was further aggravated.

Key words: lidar, atmospheric particulate mass, haze, extinction coefficient, depolarization ratio

中图分类号:

TN958.98

黄祖照董云升刘建国刘文清陆亦怀赵雪松张天舒李铁. 珠三角地区一次灰霾天气过程激光雷达观测与分析[J]. 大气与环境光学学报, 2013, 8(2): 114-123.

HUANG Zu-Zhao, DONG Yun-Sheng, LIU Jian-Guo, LIU Wen-Qing, LIU Yi-Fu, ZHAO Xue-Song, ZHANG Tian-Shu, LI Tie. Observation and Analysis of a Haze Process in Perl River Delta Region Using Lidar[J]. Journal of Atmospheric and Environmental Optics, 2013, 8(2): 114-123.

参考文献

[1] China Meteorological Administration. Observation and Forecasting Levels of Haze [M]. Beijing: China Meteorological Press, 2010: 201(in Chinese).
中国气象局. 霾的观测和预报等级 [M]. 北京: 中国气象出版社, 2010: 201(in Chinese).
[2] Chen Boyu. Study of the haze over the Guangzhou region [J]. Guangzhou Chemical, 2010, 37(6): 224-226(in Chinese).
陈博宇. 广州大气灰霾现象研究 [J]. 广州化工, 2010, 37(6): 224-226.
[3] Wu Dui, Deng Xuejiao, Bi Xueyan, et al. Distinguishing of fog or haze and the operational criteria for observation forecasting and early warning of haze in urban areas of Guangdong, Hongkong and Macau [J]. Guangdong Meteorology, 2007, 29(2): 5-10(in Chinese).
吴兑, 邓雪娇, 毕雪岩, 等. 都市霾与雾的区分及粤港澳的灰霾天气观测预报预警标准 [J]. 广东气象, 2007, 29(2): 5-10.
[4] Wu Dui. A discussion on difference between haze and fog and warning of ash haze weather [J]. Meteorological, 2005, 31(4): 3-7(in Chinese).
吴兑．关于霾与雾的区别和灰霾天气预警的讨论 [J]. 气象, 2005, 31(4): 3-7.
[5] http://baike.baidu.com/view/49842.htm#4 [OL].
[6] Dong Yunsheng, Liu Wenqing, Liu Jianguo, et al. Lidar study of the aerosol characteristic in Beijing during traffic controlled [J]. Acta Optica Sinica, 2009, 29(2): 292-296(in Chinese).
董云升, 刘文清, 刘建国, 等. 北京城区限车期间气溶胶特征激光雷达观测研究 [J]. 光学学报, 2009, 29(2): 292-296.
[7] Dong Yunsheng, Liu Wenqing, Lu Yihuai, et al. Observation of the atmospheric particles around Beijing area during 2008 Olympic Games by lidar [J]. Journal of Atmospheric and Environmental Optics, 2009, 4(5): 368-375(in Chinese).
董云升, 刘文清, 陆亦怀, 等. 2008年北京奥运期间大气颗粒物激光雷达观测研究 [J]. 大气与环境光学学报, 2009, 4(5): 368-375.
[8] Ansmann A, Riebesel M, Weitkamp C. Measurement of atmospheric aerosol extinction profiles with a Raman Lidar [J]. Opt. Lett., 1990, 15(13): 746-748.
[9] Schotland R M, Sassen K, Stone R. Observation by lidar of linear depolarization ratios for hydrometeors [J]. J. Appl. Meteor., 1971, 10(5): 1011-1017.
[10] Sassen K. Lidar backscatter depolarization technique for cloud and aerosol research [C]. Light Scattering by Nonspherical Particles: Theory, Measurements, and Applications [M]. San Diego: Academic Press, 2000: 393-416.
[11] Mattis I, Ansmann A, Müller D, et al. Multiyear aerosol observations with dualwavelength Raman lidar in the framework of EARLINET [J]. J. Geophys. Res., 2004, 109(13): D13203.1- D13203.15.
[12] Tesche M, Ansmann A, Müller D, et al. Particle backscatter, extinction, and lidar ratio profiling with Raman lidar in south and north China [J]. Appl. Opt., 2007, 46(25): 6302-6308.
[13] Li C C, Mao J T, Lau K-H A, et al. Characteristics of distribution and seasonal variation of aerosol optical depth in eastern China with MODIS products [J]. Chin. Sci. Bull., 2003, 48(22): 2488-2495.
[14] Müller D, Tesche M, Eichler H, et al. Strong particle light absorption over the Pearl River Delta (south China) and Beijing (north China) determined from combined Raman lidar and Sun photometer observations [J]. Geophys. Res. Lett., 2006, 33(20): L20811.1-L20811.4.
[15] Murayama T, Sekiguchi M. Intercomparison of aerosol optical properties observed by LIDAR, sun/sky photometers and surface in situ measurements during Asian dust event in Tokyo, Japan [C]. Proc. the 24th International Laser Radar Conference, Boulder-Colorado, USA, 2008: 943-946.
[16] Wu Dui, Deng Xuejiao, Bi Xueyan, et al. Study on the visibility reduction caused by atmospheric haze in Guangzhou Area [J]. Journal of Tropical Meteorology, 2007, 23(1): 1-6(in Chinese). 吴兑, 邓雪娇, 毕雪岩, 等. 细粒子污染形成灰霾天气导致广州地区能见度下降 [J]. 热带气象学报, 2007, 23(1): 1-6.
[17] Ramanathan V, Crutzen P J, Mitra A P, et al. The Indian Ocean experiment and the Asian brown cloud [J]. Curr. Sci., 2002, 83(8): 947-955.
[18] Liu Z, Sugimoto N, Murayama T. Extinction-to-backscatter ratio of Asian dust observed with high-spectral resolution LIDAR and Raman LIDAR [J]. Appl. Opt., 2002, 41(15): 2760-2767.