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High-resolution inventory of mercury emissions from biomass burning in tropical continents during 2001-2017

机译：2001-2017年热带大陆生物质燃烧产生的汞排放的高分辨率清单

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摘要

Mercury emissions from biomass burning contribute significantly to the atmospheric mercury budget and the interannual variation of mercury concentrations in the troposphere. This study developed a highresolution (0.1 degrees x 0.1 degrees) monthly inventory of mercury emissions from biomass burning across five land types in the tropical continents (Central and South America, Africa, and South and Southeast Asia) during 2001-2017. The inventory estimates of mercury emissions from biomass burning are based on the newly released MCD64A1 Version 6 Burned Area data product, satellite and observational data of biomass density, and spatial and temporal variable combustion factors. Results from the inventory demonstrated that during 2001-2017, the average annualmercury emissions frombiomass burning in tropical continentswas 497Mg and ranged from289Mg to 681Mg. Forest fireswere the largest contributor, accounting for 61% (300Mg) of the total mercury emissions from biomass burning, followed by fires in woody savanna/shrubland (30%, 151 Mg), savanna/grassland (7%, 35 Mg), peatland (1%, 6 Mg), and cropland (1%, 5 Mg). However, these proportions varied between the continents; in theAmericas and Asia, the largest biomass burningemissions came fromforest fires, and in Africa the largest emissions were from fires woody savanna/shrubland. Between the three continents, Africa released 41% of the mercury emissions from biomass burning (202 Mg year(-1)), Asia released 31% (154 Mg year-1), and the Americas released 28% (141 Mg year-1). The total mercury emissions from biomass burning in these tropical continents exhibited strong interannual variations from 2001 to 2017, with peak emissions in March and August to September, and forest fires were the primary land type controlling the interannual variations. (c) 2018 Elsevier B. V. All rights reserved.
机译：生物质燃烧产生的汞排放极大地影响了大气中的汞预算和对流层中汞浓度的年际变化。这项研究建立了一个高分辨率（0.1度x 0.1度）的月度清单，该清单是2001-2017年期间热带大陆（中美洲和南美洲，非洲以及南亚和东南亚）的五种土地类型燃烧生物质产生的汞排放的清单。生物量燃烧产生的汞排放的清单估算基于最新发布的MCD64A1第6版燃烧区数据产品，生物量密度的卫星和观测数据以及时空可变燃烧因子。清单的结果表明，在2001-2017年期间，热带大陆生物质燃烧产生的年平均汞排放量为497Mg，范围从289Mg至681Mg。森林火灾是最大的贡献者，占生物质燃烧汞排放总量的61％（300Mg），其次是木质大草原/灌木丛（30％，151 Mg），大草原/草地（7％，35 Mg），泥炭地大火（1％，6 Mg）和农田（1％，5 Mg）。但是，这些比例在各大洲之间有所不同。在美洲和亚洲，最大的生物质燃烧排放来自森林大火，而在非洲，最大的排放源则是木质大草原/灌木丛。在三大洲之间，非洲释放了41％的生物质燃烧产生的汞排放（202 Mg年（-1）），亚洲释放了31％（154 Mg年-1），美洲释放了28％（141 Mg一年）。 ）。在2001年至2017年期间，这些热带大陆生物质燃烧产生的汞排放总量呈现强烈的年际变化，在3月，8月至9月达到峰值排放，而森林大火是控制年际变化的主要土地类型。 （c）2018 Elsevier B.V.保留所有权利。

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  • 来源
    《The Science of the Total Environment》 |2019年第25期|638-648|共11页
  • 作者

    Shi Yusheng; Zhao Aimei; Matsunaga Tsuneo; Yamaguchi Yasushi; Zang Shuying; Li Zhengqiang; Yu Tao; Gu Xingfa;

  • 作者单位

    Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Environm Protect Key Lab Satellite Remote S, Beijing 100101, Peoples R China|Natl Inst Environm Studies, Ctr Global Environm Res, Tsukuba, Ibaraki 3058506, Japan|Natl Inst Environm Studies, Satellite Observat Ctr, Tsukuba, Ibaraki 3058506, Japan;

    Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Environm Protect Key Lab Satellite Remote S, Beijing 100101, Peoples R China;

    Natl Inst Environm Studies, Ctr Global Environm Res, Tsukuba, Ibaraki 3058506, Japan|Natl Inst Environm Studies, Satellite Observat Ctr, Tsukuba, Ibaraki 3058506, Japan;

    Nagoya Univ, Grad Sch Environm Studies, Nagoya, Aichi 4648601, Japan;

    Harbin Normal Univ, Sch Geog Sci, Harbin 150025, Heilongjiang, Peoples R China;

    Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Environm Protect Key Lab Satellite Remote S, Beijing 100101, Peoples R China;

    Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Environm Protect Key Lab Satellite Remote S, Beijing 100101, Peoples R China;

    Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Environm Protect Key Lab Satellite Remote S, Beijing 100101, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Mercury emissions; Biomass burning; Forest fires; Tropical continents; Spatiotemporal variations;

    机译：汞排放;生物量燃烧;森林火灾;热带大陆;时空变化;

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