Global Charcoal Mobilization from Soils via Dissolution and Riverine Transport to the Oceans

被引：432

作者：

Jaffe, Rudolf ^{[1
,2
]}

Ding, Yan ^{[1
,2
]}

Niggemann, Jutta ^{[3
]}

Vahatalo, Anssi V. ^{[4
,5
]}

Stubbins, Aron ^{[6
]}

Spencer, Robert G. M. ^{[7
]}

Campbell, John ^{[8
]}

Dittmar, Thorsten ^{[3
]}

机构：

[1] Florida Int Univ, SERC, Miami, FL 33199 USA

[2] Florida Int Univ, Dept Chem & Biochem, Miami, FL 33199 USA

[3] Carl von Ossietzky Univ Oldenburg, Inst Chem & Biol Marine Environm, Max Planck Res Grp Marine Geochem, D-29129 Oldenburg, Germany

[4] Univ Helsinki, Dept Environm Sci, FIN-00014 Helsinki, Finland

[5] Univ Jyvaskyla, Dept Biol & Environm Sci, Jyvaskyla 40500, Finland

[6] Skidaway Inst Oceanog, Savannah, GA 31411 USA

[7] Woods Hole Res Ctr, Falmouth, MA 02540 USA

[8] US Forest Serv, USDA, No Res Stn, Durham, NH 03824 USA

来源：

SCIENCE | 2013年 / 340卷 / 6130期

基金：

美国国家科学基金会; 芬兰科学院;

关键词：

DISSOLVED BLACK CARBON; ORGANIC-MATTER;

D O I：

10.1126/science.1231476

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Global biomass burning generates 40 million to 250 million tons of charcoal every year, part of which is preserved for millennia in soils and sediments. We have quantified dissolution products of charcoal in a wide range of rivers worldwide and show that globally, a major portion of the annual charcoal production is lost from soils via dissolution and subsequent transport to the ocean. The global flux of soluble charcoal accounts to 26.5 +/- 1.8 million tons per year, which is similar to 10% of the global riverine flux of dissolved organic carbon (DOC). We suggest that the mobilization of charcoal and DOC out of soils is mechanistically coupled. This study closes a major gap in the global charcoal budget and provides critical information in the context of geoengineering.

引用

页码：345 / 347

页数：3

共 30 条

[1] Pyrogenic carbon soluble fraction is larger and more aromatic in aged charcoal than in fresh charcoal [J].