Iron supply and demand in the upper ocean: Is extraterrestrial dust a significant source of bioavailable iron?

被引：51

作者：

Johnson, KS ^{[1
]}

机构：

[1] Monterey Bay Aquarium Res Inst, Moss Landing, CA 95039 USA

来源：

GLOBAL BIOGEOCHEMICAL CYCLES | 2001年 / 15卷 / 01期

关键词：

D O I：

10.1029/2000GB001295

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Interplanetary dust particles accrete on the Earth at a rate of similar to 40 ktons yr(-1). Some 90% of this material evaporates in the atmosphere, producing a bioavailable iron flux of 3x10(-7) mol Fe m(-2) yr(-1). This extraterrestrial Fe flux is 30 - 300% of the eolian flux of bioavailable iron transported from terrestrial sources in remote marine regions and similar to 20% of the upwelled Fe flux in the Southern Ocean. Extraterrestrial Fe may play an important role in regulating the marine carbon cycle in these regions.

引用

页码：61 / 63

页数：3

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