Impacts of post-harvest open biomass burning and burning ban policy on severe haze in the Northeastern China
Impacts of post-harvest open biomass burning and burning ban policy on severe haze in the Northeastern China
复制标题
生物质采后露天焚烧和禁烧政策对东北地区严重雾霾的影响
DOI：
10.1016/j.scitotenv.2020.136517
复制
发表时间：
2020-05-10
影响因子：
9.8
通讯作者：
Gao, Chao
中科院分区：
文献类型：
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作者：
Yang, Guangyi;Zhao, Hongmei;Gao, Chao
在中国东北地区的收获季后，露天生物质燃烧是大气颗粒物和活性微量气体的主要来源。由于盛行的天气条件和高排放密度，该地区容易出现空气污染物积聚，这往往会导致严重的霾事件。在本研究中，我们结合卫星和地面观测以及区域空气质量模拟系统，对一次严重霾事件期间露天生物质燃烧对地表PM2.5（直径小于2.5微米的颗粒物）浓度的贡献进行了量化。在此期间（2015年11月1日 - 4日），黑龙江、吉林和辽宁三省的平均PM2.5浓度分别达到116.98微克/立方米、98.60微克/立方米和70.17微克/立方米。模型模拟显示，露天生物质燃烧对中国东北地区PM2.5浓度的贡献率为52.7%。利用搭载在“索米 - NPP”卫星上的可见红外成像辐射仪套件（VIIRS）所探测到的活跃火点差异，我们估计2018年实施的禁烧令使得黑龙江、吉林和辽宁三省的PM2.5浓度分别比2015年水平下降了67.10%、53.23%和10.06%。在该地区，禁烧令在减少火灾排放以及在收获季后将区域范围内的PM2.5浓度降低48.1%方面被证明是有效的。（C）2020爱思唯尔有限公司。版权所有。
Open filed biomass burning is a major contributor to airborne particulate matter and reactive trace gases during the post-harvest season in the Northeastern China. Due to prevailing weather conditions and high emission density, this region is prone to the accumulation of air pollutants that often leads to severe haze events. In this study, we combined satellite and ground observations, and a regional air quality modeling system to quantify the con- tribution of open biomass burning to surface PM2.5 (particulate matter with diameter less than 2.5 mu m), concen- trations during a severe haze episode. During this period (November 1st - 4th 2015), the average PM2.5 concentrations in Heilong-jiang, Jilin, and Liaoning provinces reached 116.98 mu g/m(3), 98.60 mu g/m(3), and 70.17 mu g/m(3) respectively. Model simulations showed that open biomass burning contributed to 52.7% of PM2.5 concentrations over Northeast China. Using the differences in active fire spots as detected by the Visible Infrared Imaging Radiometer Suites (VIIRS) aboard the Suomi-NPP, we estimated that the burning ban enforced in 2018 have caused the PM2.5 concentrations to decrease from the 2015 level by 67.10%, 53.23%, and 10.06% in the Heilong-jiang, Jilin, and Liaoning provinces respectively. Over the region, the burning ban proved to be effective in reducing fire emissions and lowering region-wide PM2.5 concentration by 48.1% during the post-harvest season. (C) 2020 Elsevier B.V. All rights reserved.