Atmospheric carbon dioxide in a less dusty world

被引：90

作者：

Parekh, P.

Dutkiewicz, S.

Follows, M. J.

Ito, T.

机构：

[1] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA

[2] Univ Washington, Joint Inst Study Atmosphere & Ocean, Seattle, WA 98195 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2006年 / 33卷 / 03期

关键词：

D O I：

10.1029/2005GL025098

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The availability of iron exerts a significant control on primary production and the export of organic matter over large areas of the ocean, especially those far from land sources. We explore the regulation of the global soft tissue pump of carbon and atmospheric CO2 by the atmospheric delivery of iron in a three-dimensional ocean circulation and biogeochemistry model. There is only a small change in atmospheric CO2 when the aeolian iron source is increased several fold but a significant increase in response to a reduction in the aeolian iron source. This strong asymmetry suggests a positive feedback, amplifying an increase in atmospheric CO2 if a warmer world is also less dusty.

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