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Using GOCI to detect the diffusion of pollution after the TianJin harbour explosion

机译：天津港爆炸后使用GOCI检测污染扩散

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摘要

The Tianjin harbour explosion has become the most serious man-made disaster in China in the last 20 years. Chemical materials and dust were cast into the air after explosion. In this research, Geostationary Ocean Colour Imager (GOCI) was used for detecting the transportation of pollution that was composed of brown carbon, nitrogen oxides, dust, etc. It is considered to be an efficient and effective approach to monitor infectant using GOCI-Rayleigh corrected reflectance Rrc (865nm)/Rrc (412nm). Images of pollutant index Rrc (865nm)/Rrc (412nm) and forward trajectories show that pollutant index exceeded 20 in the morning and then dropped to 1 at 07:28 (UTC) on 13 August 2015. Combined with the prediction model of National Oceanic and Atmospheric Administration forward trajectory, this research shows that the diffusion of infectant, originated at the northern part of the Bohai Sea water near Tangshan and Qinhuangdao, eventually spread to the south of the Bohai Sea (Yellow River Estuary). The vertical distribution of the pollutant was identified in the air, 1000-2000 m above sea level, and pollutant migrated to the south, which finally dissipated at the south of Bohai Bay. Since GOCI aerosol optical thickness of infectant is less than 1, and Rrc (865nm)/Rrc (412nm) pollutant index of infectant is more than 1, the type of explosive pollutant is preliminarily distinguished by the characteristic of spectrum and GOCI-Rrc image. The main pollutants were carbonaceous aerosol (caused by combustion explosion, main brown carbon), nitrogen oxides (which were adsorbed and adhered to particulate matter), dust, and other substances. This research provides an effective method to detect explosive pollution by GOCI in the future.
机译：过去二十年来，天津海港爆炸已成为中国最严重的人为灾难。爆炸后，化学物质和灰尘被撒到空气中。在这项研究中，地球静止海洋彩色成像仪（GOCI）用于检测由棕色碳，氮氧化物，粉尘等组成的污染物的运输。它被认为是一种有效且有效的利用GOCI-Rayleigh监测传染病的方法。校正反射率Rrc（865nm）/ Rrc（412nm）。污染物指数Rrc（865nm）/ Rrc（412nm）和前向轨迹的图像显示，污染物指数在早晨超过20，然后在2015年8月13日07:28（UTC）降至1。结合国家海洋学的预测模型和大气管理局的前向轨迹，该研究表明，传染源的扩散起源于唐山和秦皇岛附近的渤海北部，最终扩散到渤海南部（黄河口）。污染物的垂直分布在海拔1000-2000 m的空气中被确定，污染物向南迁移，最后在渤海湾南部消散。由于感染者的GOCI气溶胶光学厚度小于1，并且感染者的Rrc（865nm）/ Rrc（412nm）污染物指数大于1，因此爆炸性污染物的类型通过光谱和GOCI-Rrc图像的特征得以初步区分。主要污染物为碳质气溶胶（由燃烧爆炸引起，主要为棕褐色碳），氮氧化物（已吸附并粘附在颗粒物上），粉尘和其他物质。该研究为今后GOCI探测爆炸物污染提供了一种有效的方法。

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  • 来源
    《International journal of remote sensing》 |2018年第6期|1744-1753|共10页
  • 作者

    Jiang Binbin; Ji Qinyuan; Teng Guochao;

  • 作者单位

    Tongji Univ, Sch Ocean & Earth Sci, Shanghai, Peoples R China;

    Newcastle Univ, Sch Civil Engn & Geosci, Newcastle Upon Tyne, Tyne & Wear, England;

    Zhejiang Univ, Sch Earth Sci, Hangzhou, Zhejiang, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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