Black carbon in deep-sea sediments

被引:383
作者
Masiello, CA [1 ]
Druffel, ERM [1 ]
机构
[1] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA
关键词
D O I
10.1126/science.280.5371.1911
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
Black carbon (BC) enters the ocean through aerosol and river deposition. BC makes up 12 to 31 percent of the sedimentary organic carbon (SOC) at two deep ocean sites, and it is 2400 to 13,900 carbon-14 years older than non-BC SOC deposited concurrently. BC is likely older because it is stored in an intermediate reservoir before sedimentary deposition. Possible intermediate pools are oceanic dissolved organic carbon (DOC) and terrestrial soils. If DOC is the intermediate reservoir, then BC is 4 to 22 percent of the DOC pool. If soils are the intermediate reservoir, then the importance of riverine carbon in the ocean carbon cycle has been underestimated.
引用
收藏
页码:1911 / 1913
页数:3
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