Integrating Point Sources to Map Anthropogenic Atmospheric Mercury Emissions in China, 1978–2021

A comprehensive emission inventory has been developed at a resolution of 0.25°×0.3125° for total mercury (HgT) and each mercury species, namely gaseous elemental mercury (Hg0), gaseous oxidized mercury (HgII), and particulate-bound mercury (HgP). The inventory stems from the Point-source Integrated China Atmospheric Mercury Emission Model, ensuring both temporal and spatial coherence. The inventory underwent validation by comparing observed atmospheric mercury concentrations with simulations from a global 3-D atmospheric chemistry model (GEOS-Chem). This rigorous validation process enhances confidence in the accuracy and reliability of the emission estimates, affirming their suitability for studying anthropogenic emissions, evaluating atmospheric pollution dynamics, and assessing potential health implications.The dataset covers a spatial range from 70°E, 15°N to 140°E, 55°N, with a spatial resolution of 0.3125° in longitude and 0.25° in latitude. The variables included in the data are HgT, Hg0, HgII and HgP. The following is a detailed explanation of the variables. HgT: total mercury, Hg0: gaseous elemental mercury, HgII: gaseous oxidized mercury, and HgP: particulate-bound mercury.

本数据集构建了一套分辨率为0.25°×0.3125°的综合汞排放清单，覆盖总汞（total mercury, HgT）以及各形态汞物种，包括气态单质汞（gaseous elemental mercury, Hg0）、气态氧化汞（gaseous oxidized mercury, HgII）与颗粒结合态汞（particulate-bound mercury, HgP）。该排放清单基于中国大气汞点源综合排放模型（Point-source Integrated China Atmospheric Mercury Emission Model）构建，保障了排放数据在时间与空间维度上的一致性。本清单通过将实测大气汞浓度与全球三维大气化学模型（GEOS-Chem）的模拟结果进行对比，完成了有效性验证。此次严谨的验证流程提升了排放估算结果的准确性与可靠性，证实其可用于人为汞排放研究、大气污染动态评估以及潜在健康影响分析。本数据集的空间覆盖范围为东经70°、北纬15°至东经140°、北纬55°，空间分辨率为经度方向0.3125°、纬度方向0.25°。数据集包含的变量为HgT、Hg0、HgII与HgP。以下为各变量的详细说明：HgT即总汞，Hg0即气态单质汞，HgII即气态氧化汞，HgP即颗粒结合态汞。

搜集汇总

背景与挑战

背景概述

该数据集提供了1978-2021年中国及周边地区人为大气汞排放的高分辨率(0.25°×0.3125°)清单，包含总汞及其三种形态(气态元素汞、气态氧化汞和颗粒结合汞)的排放数据，经过全球3-D大气化学模型验证，适用于研究人为排放、评估大气污染动态和潜在健康影响。