• 关键词：MODIS  VIIRS  CALIPSO  气溶胶光学厚度(AOD)  霾污染  时空分布特征  东北地区

• 基金项目：国家重点研发计划重点专项（2017）（No.2017YFC0212303，2017YFC0212304）；国家自然科学基金（No.41771071，41775116，21407148）；中国科学院前沿科学重点研究项目（No.QYZDB-SSW-DQC045）；中国科学院青年创新促进会项目（No.2017275）；吉林省重点科技攻关项目（No.20150204031SF）

• 何月欣
• 1. 中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室, 长春 130102;2. 中国科学院大学, 北京 100049

• 张学磊
• 1. 中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室, 长春 130102;2. Center for Spatial Information Science and Systems, George Mason University, Fairfax, VA 22030

• 陈卫卫
• 中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室, 长春 130102

• 张世春
• 中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室, 长春 130102

• 赵红梅
• 中国科学院东北地理与农业生态研究所湿地生态与环境重点实验室, 长春 130102

• 摘要：利用多卫星（MODIS、CALIPSO、VⅡRS）观测的气溶胶产品、地面空气质量监测数据和气象资料，获取了东北地区2006-2015年期间气溶胶光学厚度（AOD）的季节和年际变化特征，并对2014年10月14日东北地区一次典型重霾污染过程的特征及其潜在传输路径进行了深入讨论.研究结果显示，自2008年起东北地区灰霾污染范围扩大且污染程度加剧，呈带状空间分布（营口-长春-哈尔滨）；区域内AOD值呈春、秋和冬季高，夏季低的时间变化特征.采用CALIPSO星载激光雷达数据与MODIS、VⅡRS卫星获取的AOD开展综合分析，可有效弥补MODIS、VⅡRS卫星因冬季积雪亮地表干扰所产生的AOD缺省区域，增强对长期积雪覆盖地区霾污染的时空特征分析能力.与反映霾污染空间分布范围更广的VⅡRS卫星相比，MODIS卫星AOD值与东北地区地面观测获取的AQI、PM₁₀和PM_2.5相关系数更高，分别为0.89、0.73和0.83.进一步研究结果显示，秋末冬初东北地区的霾污染事件与农作物秸秆焚烧有关，同时，华北地区灰霾污染可跨越渤海湾传输至东北地区，进一步形成更大尺度的带状区域污染.

• Abstract：Multi-satellites derived aerosol optical depth (AOD) (i.e.,MODIS,VⅡRS and CALIPSO),ground-level-observed air quality data and meteorological data from 2006 to 2015 were used to explore the spatial and temporal distribution of regional air pollution in Northeastern China.A typical haze event in autumn (i.e.,October 14,2014) was further investigated to verify the regional pollution characteristics and its potential transport trajectories.The results showed a clearly tendency that the increased air pollution was gradually formed a "haze belt" over the region of "Yingkou-Changchun-Haerbin" since 2008 in Northeastern China.Furthermore,the regional air quality in spring (Apirl and May) and winter (November to March) were obviously worse than it in autumn (September and October) and summer (June to August).With the comprehensive analysis of the AOD data from CALIPSO,MODIS and VⅡRS,it could effectively fill the gap that the AOD cannot be retrieved over the bright snow surface for MODIS and VⅡRS,and could reveal the temporal and spatial characteristics of haze pollution for long-time snow covered areas.Although the VⅡRS AOD showed wider spatial distribution of haze pollution,MODIS AOD was more relevant to the observed AQI(r=0.89),PM₁₀(r=0.73) and PM_2.5 (r=0.83).Straw burning in early winter is most likely to be the primary emission source to effect the heavy haze events.In addition,the haze pollution in northern China (including Beijing-Tianjing-Hebei region) can be transported to Northeastern China across the Bohai Bay to form larger scale trans-regional pollution.

• Key words：MODIS  VⅡRS  CALIPSO  aerosol optical depth (AOD)  haze pollution  spatial and temporal distribution  Northeastern China

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