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首页> 外文期刊>Atmospheric research >Long-term (2002-2014) evolution and trend in Collection 5.1 Level-2 aerosol products derived from the MODIS and MISR sensors over the Chinese Yangtze River Delta
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Long-term (2002-2014) evolution and trend in Collection 5.1 Level-2 aerosol products derived from the MODIS and MISR sensors over the Chinese Yangtze River Delta

机译：来自中国长江三角洲MODIS和MISR传感器的5.1级2级气溶胶产品的长期（2002-2014年）演变和趋势

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摘要

The present study aims to investigate spatio-temporal evolution and trend in the aerosol optical properties (aerosol optical depth, AOD; Angstrom exponent, AE), qualitatively identify different types and origin of aerosols over an urban city, Nanjing in the Yangtze River Delta, East China. For this purpose, the Collection 5.1 Level-2 data obtained from the Moderate resolution Imaging Spectroradiometer (MODIS) sensor onboard Terra and Aqua satellites and the Multi-angle Imaging Spectroradiometer (MISR) instrument for the period between 2002 and 2014 have been analyzed. An inter-comparison and validation of AOD were performed against the AOD measurements obtained from the ground-based Aerosol Robotic Network (AERONET) sunphotometer. The MODIS AOD(550) exhibited wide spatial and temporal distributions over East China, while MISR AOD(555) was consistently lower than that of Terra and Aqua AOD(550) values. The temporal variations (monthly and seasonal mean) of MODIS (Terra and Aqua) and MISR AOD values exhibited a similar pattern. The seasonal mean AOD(550) (AE(470-660)) was found to be maximum with 0.97 +/- 0.48 during summer (1.16 +/- 033 in summer) and a minimum of 0.61 +/- 0.28 during the winter season (0.80 +/- 0.28 in spring). The annual mean Terra AOD(550) at Nanjing showed a strong decreasing trend (-0.70% year(-1)), while the Aqua exhibited a slight increasing trend ( +0.01 year(-1)) during the study period. Seasonal air mass back-trajectories obtained from the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model were also computed to infer on the transport component over the study region. Different aerosol types were identified via the relationship between AOD(550) and fine mode fraction, which reveals that the biomass burning/urban-industrial type aerosols (desert dust) are abundant over the region in summer (spring), apart from the mixed aerosol type. (C) 2016 Elsevier B.V. All rights reserved.
机译：本研究旨在调查气溶胶光学特性（气溶胶光学深度，AOD；埃斯特罗姆指数，AE）的时空演变和趋势，定性地确定长三角南京市的气溶胶的不同类型和来源。华东地区。为此，分析了从Terra和Aqua卫星上的中等分辨率成像光谱仪（MODIS）传感器和多角度成像光谱仪（MISR）仪器获得的2002年至2014年期间的Collection 5.1 Level-2数据。通过从地面气溶胶机器人网络（AERONET）日光光度计获得的AOD测量值进行AOD的相互比较和验证。 MODIS AOD（550）在华东地区表现出广泛的时空分布，而MISR AOD（555）始终低于Terra和Aqua AOD（550）值。 MODIS（Terra和Aqua）的时间变化（每月和季节性平均值）和MISR AOD值表现出相似的模式。发现季节性平均AOD（550）（AE（470-660））最高，夏季为0.97 +/- 0.48（夏季为1.16 +/- 033），冬季最低为0.61 +/- 0.28 （弹簧为0.80 +/- 0.28）。在研究期间，南京地区的年平均Terra AOD（550）表现出强烈的下降趋势（-0.70％year（-1）），而Aqua则表现出轻微的上升趋势（+0.01 year（-1））。还计算了从混合单粒子拉格朗日综合航迹（HYSPLIT）模型获得的季节性空气质量反航迹，以推断研究区域内的输运分量。通过AOD（550）与精细模式分数之间的关系确定了不同的气溶胶类型，这表明除了混合气溶胶外，夏季（春季）区域内生物质燃烧/城市工业型气溶胶（沙漠尘埃）丰富。类型。 （C）2016 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Atmospheric research》 |2016年第11期|29-43|共15页
  • 作者

    Kang Na; Kumar K. Raghavendra; Hu Kang; Yu Xingna; Yin Yan;

  • 作者单位

    Nanjing Univ Informat Sci & Technol, Sch Atmospher Phys,Key Lab Aerosol Cloud Precipit, Key Lab Meteorol Disaster,Collaborat Innovat Ctr, Minist Educ KLME,Int Joint Lab Climate & Environm, Nanjing 210044, Jiangsu, Peoples R China;

    Nanjing Univ Informat Sci & Technol, Sch Atmospher Phys,Key Lab Aerosol Cloud Precipit, Key Lab Meteorol Disaster,Collaborat Innovat Ctr, Minist Educ KLME,Int Joint Lab Climate & Environm, Nanjing 210044, Jiangsu, Peoples R China;

    Nanjing Univ Informat Sci & Technol, Sch Atmospher Phys,Key Lab Aerosol Cloud Precipit, Key Lab Meteorol Disaster,Collaborat Innovat Ctr, Minist Educ KLME,Int Joint Lab Climate & Environm, Nanjing 210044, Jiangsu, Peoples R China;

    Nanjing Univ Informat Sci & Technol, Sch Atmospher Phys,Key Lab Aerosol Cloud Precipit, Key Lab Meteorol Disaster,Collaborat Innovat Ctr, Minist Educ KLME,Int Joint Lab Climate & Environm, Nanjing 210044, Jiangsu, Peoples R China;

    Nanjing Univ Informat Sci & Technol, Sch Atmospher Phys,Key Lab Aerosol Cloud Precipit, Key Lab Meteorol Disaster,Collaborat Innovat Ctr, Minist Educ KLME,Int Joint Lab Climate & Environm, Nanjing 210044, Jiangsu, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    MODIS; Aerosol optical depth; Trend analysis; Aerosol type; HYSPLIT; East China;

    机译：MODIS;气溶胶光学深度;趋势分析;气溶胶类型;HYSPLIT;华东;

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