Recently, the research team of Shi Yusheng, National Engineering Laboratory of Remote Sensing Satellite Applications, Institute of Aerospace Information, Chinese Academy of Sciences, has made progress in estimating remote sensing mercury emissions from biomass burning in tropical regions of the world. Related research results High-resolution inventory of mercury emissions from biomass burning in tropical continents during 2001-2017 ("2001-2017 global high-resolution biomass burning mercury emissions in tropical regions") was published online on November 2 in Environmental Science and Science journal of the Total Environment ("Total Environmental Science").
Mercury is listed as a global pollutant by the United Nations Environment Programme and is defined as the only chemical substance that has a global impact other than greenhouse gases. On January 19, 2013, the United Nations Environment Program adopted the Minamata Convention (also known as the “Mercury Conventionâ€), an international convention aimed at controlling and reducing mercury emissions on a global scale, and developed a list to limit mercury emissions, specifying specific Limit the scope of emissions and further promote the global mercury emission reduction process to reduce the damage caused by mercury to the environment and human health. On August 16, 2017, the Mercury Convention officially entered into force for China. This is a new global convention signed in the field of environment and health in the past decade, prompting the government to take specific measures to control mercury pollution emissions. In addition to emissions from human activities, biomass burning is also an important source of mercury emissions. As global changes continue to intensify, the frequency and intensity of fires and the scope of impact have increased to varying degrees, and biomass burning has severely affected the circulation and transmission of atmospheric mercury.
Shi Yusheng's research team jointly conducted research with the National Institute of Environmental Research, Nagoya University and other institutions, using self-developed high-resolution biomass combustion emission inventory models, combined with remote sensing inversion of aboveground biomass, vegetation index and coverage and other parameters to develop The 2001-2017 global mercury emissions list for biomass burning in tropical regions reveals the spatial distribution characteristics of mercury emitted by forest fires, bush fires, grassland fires, crop straw burning, peatland fires, etc. with a resolution of 0.1 degrees in global tropical regions. The results show that the average annual mercury emissions from biomass burning in tropical regions reach 497 tons, and forest fires are the main source of emissions (61%). The spatial distribution shows that mercury emissions in Africa account for 41% of the total, higher than in Asia (31%) and America (28%). The long-term high-resolution biomass combustion mercury emission list developed by the institute provides important data sources and reference basis for global atmospheric mercury transmission, regional atmospheric mercury pollution prevention and environmental health assessment.
Shi Yusheng is the first author and corresponding author of the paper. The research work was supported by the Chinese Academy of Sciences, the National Natural Science Foundation of Japan, and the National Institute of Environmental Research of Japan.
2001-2017 global annual distribution of mercury emissions from biomass burning in tropical regions
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