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首页> 外文期刊>Atmospheric chemistry and physics >A high-resolution regional emission inventory of atmospheric mercury and its comparison with multi-scale inventories: a case study of Jiangsu, China
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A high-resolution regional emission inventory of atmospheric mercury and its comparison with multi-scale inventories: a case study of Jiangsu, China

机译：大气汞的高分辨率区域排放清单及其与多尺度清单的比较：以江苏省为例

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A better understanding of the discrepancies in multi-scale inventories could give an insight into their approaches and limitations as well as provide indications for further improvements; international, national, and plant-by-plant data are primarily obtained to compile those inventories. In this study we develop a high-resolution inventory of Hg emissions at 0.05°??×??0.05° for Jiangsu, China, using a bottom-up approach and then compare the results with available globalational inventories. With detailed information on individual sources and the updated emission factors from field measurements applied, the annual Hg emissions of anthropogenic origin in Jiangsu in 2010 are estimated at 39?105?kg, of which 51, 47, and 2?% were Hgsup0/sup, Hgsup2+/sup, and Hgsupp/sup, respectively. This provincial inventory is thoroughly compared to three downscaled national inventories (NJU, THU, and BNU) and two global ones (AMAP/UNEP and EDGARv4.tox2). Attributed to varied methods and data sources, clear information gaps exist in multi-scale inventories, leading to differences in the emission levels, speciation, and spatial distributions of atmospheric Hg. The total emissions in the provincial inventory are 28, 7, 19, 22, and 70?% larger than NJU, THU, BNU, AMAP/UNEP, and EDGARv4.tox2, respectively. For major sectors, including power generation, cement, iron and steel, and other coal combustion, the Hg contents (HgC) in coals/raw materials, abatement rates of air pollution control devices (APCDs) and activity levels are identified as the crucial parameters responsible for the differences in estimated emissions between inventories. Regarding speciated emissions, a larger fraction of Hgsup2+/sup is found in the provincial inventory than national and global inventories, resulting mainly from the results by the most recent domestic studies in which enhanced Hgsup2+/sup were measured for cement and iron and steel plants. Inconsistent information on large power and industrial plants is the main source of differences in spatial distribution of emissions between the provincial and other inventories, particularly in southern and northwestern Jiangsu, where intensive coal combustion and industry are located. Quantified with Monte Carlo simulation, uncertainties in the provincial inventory are smaller than those of the NJU national inventory, resulting mainly from the more accurate activity data of individual plants and the reduced uncertainties in HgC in coals/raw materials.
机译：更好地了解多尺度清单中的差异可以深入了解其方法和局限性，并为进一步改进提供指示;主要获取国际，国家和工厂数据来汇编这些清单。在这项研究中，我们采用自下而上的方法，为中国江苏省建立了0.05°××0.05°H的高分辨率汞排放清单，然后将结果与可用的全球/国家清单进行了比较。借助有关各个来源的详细信息以及通过现场测量获得的最新排放因子，江苏省人为来源的汞年排放量估计为39？105？kg，其中Hg 0 ，Hg 2 + 和Hg p 。将该省级清单与三个缩减的国家清单（NJU，THU和BNU）和两个全球清单（AMAP / UNEP和EDGARv4.tox2）进行了彻底比较。由于方法和数据来源的差异，多尺度清单中存在明显的信息空白，导致大气汞的排放水平，形态和空间分布存在差异。省级清单中的总排放量分别比NJU，THU，BNU，AMAP / UNEP和EDGARv4.tox2大28、7、19、22和70％。对于主要部门，包括发电，水泥，钢铁和其他煤炭燃烧，煤/原料中的汞含量（HgC），空气污染控制装置（APCD）的减排率和活动水平被确定为关键参数负责估算清单之间的排放量差异。关于特定排放，在省级清单中发现的Hg 2 + 比例要比国家和全球清单更大，这主要是由于最新的国内研究结果表明，Hg 2+ 用于水泥厂和钢铁厂。有关大型发电厂和工业电厂的信息不一致是造成省级和其他清单之间排放空间分布差异的主要来源，尤其是在煤和工业密集的江苏南部和西北部。通过蒙特卡洛模拟进行量化，省级清单中的不确定性小于新泽西州国家级清单中的不确定性，这主要是由于单个工厂的活动数据更准确以及煤/原料中HgC的不确定性降低了。

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