Spatio-temporal variations in SO2 and NO2 emissions caused by heating over the Beijing-Tianjin-Hebei Region constrained by an adaptive nudging method with OMI data
Spatio-temporal variations in SO2 and NO2 emissions caused by heating over the Beijing-Tianjin-Hebei Region constrained by an adaptive nudging method with OMI data
复制标题
基于OMI数据的自适应微移方法约束京津冀地区供暖SO2和NO2排放时空变化
DOI：
10.1016/j.scitotenv.2018.06.021
复制
发表时间：
2018-11-15
影响因子：
9.8
通讯作者：
Zhao, Yuguang
中科院分区：
文献类型：
--
作者：
Meng, Kai;Xu, Xiangde;Zhao, Yuguang
我国京津冀地区空气污染严重，尤其是采暖期。SO2和NO2是燃煤排放的两种主要气态污染物。BTH地区中南部地区采暖导致的空气污染增加幅度高于北方地区。SO2和NO2增量的分布差异显著。在这项工作中，SO2和NO2的排放量在BTH区域使用自适应的“轻推”约束方法和变分处理技术的基础上，臭氧监测仪器（OMI）的卫星数据和地面测量数据在2015年收集的。该方法的应用可以提供可靠的，最新的和高分辨率的SO2和NO2排放源的映射。这些SO2和NO2排放量反映了非采暖季和采暖季不同气象条件下城市群和农村地区点源和面源的空间差异。采暖季SO2和NO2的排放强度和影响显著大于非采暖季，尤其是SO2的排放强度和影响。冬季北半球北方地区SO2排放量的增加大于南方地区。此外，SO2排放量的显著增加主要发生在郊区和农村地区，而NO2排放量的显著增加主要发生在城市群。在主要的城市地区，煤已被天然气或电力取代用于供暖。冬季供暖导致的二氧化硫排放量增加比其他地区要小得多。郊区和农村地区的大量散煤消费可能造成严重的区域空气污染。北京南部至廊坊一带冬季SO2和NO2排放量明显增加。保定、石家庄、邢台。这与该地区特殊的“准定常”大气污染物输送带相一致。上述结果表明，自适应“轻推”约束排放方法可以在特定季节的空气污染控制的有效工具。(C)2018爱思唯尔B.V.保留所有权利。
The Beijing-Tianjin-Hebei (BTH) region in China suffers from heavy air pollution, especially in heating period. SO2 and NO2 are two of the key primary gaseous pollutants emitted by coal burning. The increase in air pollution caused by heating in the south-central part of the BTH region is higher than that in the northern part. And the distribution of SO2 and NO2 increment has significant differences. In this work, SO2 and NO2 emissions over the BTH region are determined using an adaptive "nudging" constrained method and a variational processing technique based on Ozone Monitoring Instrument (OMI) satellite data and surface measurement data collected in 2015. The application of the method can provide reliable, up-to-date and high-resolution mapping of sources of SO2 and NO2 emissions. These SO2 and NO2 emissions reflect the spatial differences in point and area sources in urban agglomerations and rural areas under different meteorological conditions during the non-heating and heating seasons. The intensity and influence of SO2 and NO2 emissions, particularly those of SO2, are significantly greater during the heating season than those during the non-heating season. Winter increases in SO2 emissions in the northern areas of the NH region are larger than those in the southern part. In addition, significant increases in SO2 emissions occur mainly in suburban and rural areas, while those of NO2 emissions mainly occur in urban agglomerations. In the major urban areas, where coal has been replaced by natural gas or electric power for heating. winter heating causes much smaller increases in SO2 emissions than in other areas. The large amounts of bulk coal consumption in the suburban and rural areas could cause significant regional air pollution. Clear increases in SO2 and NO2 emissions in winter occur along a belt from southern Beijing to Langfang. Baoding, Shijiazhuang and Xingtai. which is consistent with a special "quasi-steady" air pollutant transport belt in the region. All above results show that the adaptive "nudging" constrained emission method could be an effective tool for air pollution control during certain seasons. (C) 2018 Elsevier B.V. All rights reserved.