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利用气溶胶硝酸盐双同位素评估天津港爆炸事故对渤海地区大气氮沉降的影响

ZONG Zheng SUN Zeyu TAN Yang TIAN Chongguo QU Lin JI Ling

大气和海洋科学快报（英文版）2020，Vol.13Issue(3)：195-201,7.
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大气和海洋科学快报（英文版）2020，Vol.13Issue(3)：195-201,7.

利用气溶胶硝酸盐双同位素评估天津港爆炸事故对渤海地区大气氮沉降的影响

Impact of an accidental explosion in Tianjin Port on enhanced atmospheric nitrogen deposition over the Bohai Sea inferred from aerosol nitrate dual isotopes

ZONG Zheng 1SUN Zeyu 1TAN Yang 2TIAN Chongguo 1QU Lin 1JI Ling3

作者信息

  • 1. Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China
  • 2. University of Chinese Academy of Sciences, Beijing, China
  • 3. Yantai Monitoring Center of Marine Environment, State Oceanic Administration of the People's Republic of China, Yantai, China
  • 折叠

摘要

Abstract

In recent years,emergent pollutant's accidents have occurred frequently in China,causing serious harm to the ecological environment.In this study,the impact of an accidental fire and explosion at Tianjin Port in 2015 on the atmosphere over the Bohai Sea was explored.Results showed sharp increases in the concentrations of several important components of fine particulate matter (e.g.NO3-,SO42-,NH4+,organic carbon,elemental carbon) over Beihuangcheng Island after the explosion.Among them,NO3-was most affected (about 10 days),with a maximum concentration of 16.45 μg m-3.The δ15N-NO3-ranged from-1.58‰ to +8.74‰,with an average of +2.79‰ ± 3.32‰.Influenced by the explosion,δ15N-NO3-decreased significantly,which was in accordance with the industrial processes of explosives.The δ18O-NO3-varied between +49.40‰ and +69.52‰,and showed a marked increase (+66.62‰ ± 3.92‰) in the explosion-affected period.Using Monte Carlo simulation,the ·OH pathway for NO3-formation was 51.79％ ± 10.94％ at that time — much lower than in the regular period.The elevated dry deposition of NO3-caused by the explosion was 266.08 μmol N m-2 d-1 over the Bohai Sea — again,much higher than in the regular period.With the dry nitrogen deposition of NH4+ (42.41 μmol N m-2 d-1),the total nitrogen deposition increased by 308.49 μmol N m-2 d-1,leading to severe ecological risk.Through the inverse computation of the dry deposition flux of NO3-,the affected area over the Bohai Sea was less than 1.42 × 104 km2,which is about 20％ of the total area.

关键词

硝酸盐/氮氧同位素/爆炸/渤海

Key words

Nitrate/nitrogen/oxygen isotope/explosion/Bohai Sea

引用本文复制引用

ZONG Zheng,SUN Zeyu,TAN Yang,TIAN Chongguo,QU Lin,JI Ling..利用气溶胶硝酸盐双同位素评估天津港爆炸事故对渤海地区大气氮沉降的影响[J].大气和海洋科学快报（英文版）,2020,13(3):195-201,7.

基金项目

This research was financially supported by a project funded by the China Postdoctoral Science Foundation[grant numbers 2017LH020 and 2017M622815]and the National Natural Science Foundation of China[grant numbers 41977190 and 41907198]. （）

大气和海洋科学快报（英文版）

OACSCD

1674-2834

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