Spatiotemporal Characteristics of Atmospheric Brown Carbon Emis-sion from Combustion Sources in China  

作　　者：OUYANG Shuyu JIANG Ke XIONG Rui MEN Yatai LUO Zhihan XING Ran SHEN Guofeng 

机构地区：[1]College of Urban and Environmental Sciences,Peking University,Beijing 100871,China [2]College of Ecology and Environment,Zhengzhou University,Henan 450001,China [3]Institute of Carbon Neutrality,Peking University,Beijing 100871,China

出　　处：《Chinese Geographical Science》2024年第6期993-1003,共11页中国地理科学（英文版）

基　　金：Under the auspices of National Natural Science Foundation(No.42077328)。

摘　　要：Atmospheric Brown Carbon(BrC)with strong wavelength-dependence light-absorption ability can significantly affect radiative forcing.Highly resolved emission inventories with lower uncertainties are important premise and essential in scientifically evaluating impacts of emissions on air quality,human health and climate change.This study developed a bottom-up inventory of primary BrC from combustion sources in China from 1960 to 2016 with a spatial resolution at 0.1°×0.1,based on compiled emission factors and detailed activity data.The primary BrC emission in China was about 593 Gg(500-735 Gg as interquartile range)in 2016,contributing to 7%(5%-8%)of a previously estimated global total BrC emission.Residential fuel combustion was the largest source of primary BrC in China,with the contribution of 67%as the national average but ranging from 25%to 99%among different provincial regions.Signi-ficant spatial disparities were also observed in the relative shares of different fuel types.Coal combustion contribution varied from 8%to 99%across different regions.Heilongjiang and North China Plain had high emissions of primary BrC.Generally,on the national scale,spatial distribution of BrC emission density per area was aligned with the population distribution.Primary BrC emission from combustion sources in China have been declined since a peak of~1300 Gg in 1980,but the temporal trends were distinct in different sectors.The high-resolution inventory developed here enables radiative forcing simulations in future atmospheric models so as to promote better understanding of carbonaceous aerosol impacts in the Earth's climate system and to develop strategies achieving co-benefits of hu-man health protection and climate change.

关 键 词：atmospheric brown carbon(BrC) emission estimate driving factors high-resolution inventory source contribution China 

分 类 号：P467[天文地球—大气科学及气象学] X51[环境科学与工程—环境工程]