Model Study of Global Mercury Deposition from Biomass Burning

被引：43

作者：

De Simone, Francesco ^{[1
]}

Cinnirella, Sergio ^{[1
]}

Gencarelli, Christian N. ^{[1
]}

Yang, Xin ^{[2
]}

Hedgecock, Ian M. ^{[1
]}

Pirrone, Nicola ^{[3
]}

机构：

[1] UNICAL Polifunz, CNR, Inst Atmospher Pollut Res, Div Rende, I-87036 Arcavacata Di Rende, Italy

[2] British Antarctic Survey, Cambridge CB3 0ET, England

[3] Area Ric Roma 1, CNR, Inst Atmospher Pollut Res, I-00015 Monterotondo, Rome, Italy

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2015年 / 49卷 / 11期

关键词：

SMOKE INJECTION HEIGHTS; EMISSIONS; FIRES; ATMOSPHERE; TRANSPORT; RESOLUTION; INVENTORY; OXIDATION; FOREST; IMPACT;

D O I：

10.1021/acs.est.5b00969

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Mercury emissions from biomass burning are not well characterized and can differ significantly from year to year. This study utilizes three recent biomass burning inventories (FINNv1.0, GFEDv3.1, and GFASv1.0) and the global Hg chemistry model, ECHMERIT, to investigate the annual variation of Hg emissions, and the geographical distribution and magnitude of the resulting Hg deposition fluxes. The roles of the Hg/CO enhancement ratio, the emission plume injection height, the Hg-(g)(0) oxidation mechanism and lifetime, the inventory chosen, and the uncertainties with each were considered. The greatest uncertainties in the total Hg deposition were found to be associated with the Hg/CO enhancement ratio and the emission inventory employed. Deposition flux distributions proved to be more sensitive to the emission inventory and the oxidation mechanism chosen, than all the other model parametrizations. Over 75% of Hg emitted from biomass burning is deposited to the worlds oceans, with the highest fluxes predicted in the North Atlantic and the highest total deposition in the North Pacific. The net effect of biomass burning is to liberate Hg from lower latitudes and disperse it toward higher latitudes where it is eventually deposited.

引用

页码：6712 / 6721

页数：10

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