Changing concentrations of CO, CH 4 , C 5 H 8 , CH 3 Br, CH 3 I, and dimethyl sulfide during the Southern Ocean Iron Enrichment Experiments

Oceanic iron (Fe) fertilization experiments have advanced the understanding of how Fe regulates biological productivity and airsea carbon dioxide (CO 2 ) exchange. However, little is known about the production and consumption of halocarbons and other gases as a result of Fe addition. Besides metabol...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences
Main Authors: Wingenter, OW, Haase, KB, Strutton, P, Friederich, G, Meinardi, S, Blake, DR, Rowland, FS
Format: Article in Journal/Newspaper
Language:English
Published: Natl Acad Sciences 2004
Subjects:
Earth Sciences
Oceanography
Biological Oceanography
Southern Ocean
Online Access:https://doi.org/10.1073/pnas.0402744101
http://ecite.utas.edu.au/138632
Description
Summary:Oceanic iron (Fe) fertilization experiments have advanced the understanding of how Fe regulates biological productivity and airsea carbon dioxide (CO 2 ) exchange. However, little is known about the production and consumption of halocarbons and other gases as a result of Fe addition. Besides metabolizing inorganic carbon, marine microorganisms produce and consume many other trace gases. Several of these gases, which individually impact global climate, stratospheric ozone concentration, or local photochemistry, have not been previously quantified during an Fe-enrichment experiment. We describe results for selected dissolved trace gases including methane (CH 4 ), isoprene (C 5 H 8 ), methyl bromide (CH 3 Br), dimethyl sulfide, and oxygen (O 2 ), which increased subsequent to Fe fertilization, and the associated decreases in concentrations of carbon monoxide (CO), methyl iodide (CH 3 I), and CO 2 observed during the Southern Ocean Iron Enrichment Experiments.

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