Journal article
Biogeochemistry of iron in Australian dust: From eolian uplift to marine uptake
G3: Geochemistry, Geophysics, Geosystems, Vol.9(3)
2008
Abstract
Dust is an important vector for iron supply to the ocean, which subsequently impacts ocean productivity, atmospheric CO2 concentrations, and hence global climate. Here, we synthesize the processes influencing the biogeochemistry of Australian dust and compare them with those from other Southern Hemisphere dust sources. Our observations range from soil and dust physical properties to abrasion and cloud chamber chemistry experiments to dust storms and their dispersion and deposition. We then present satellite observations of the impact of episodic dust deposition events on the productivity of low-iron oceanic waters north (i.e., low-nitrate, low-chlorophyll (LNLC)) and south (i.e., high-nitrate, low-chlorophyll (HNLC)) of Australia. Dust deposition from the largest dust storm in over 40 years did not result in iron-mediated algal blooms in either oceanic region. A comparison of Australia with other Southern Hemisphere source regions reveals that the relatively well sampled Australian system is a poor generic model. Furthermore, there are marked distinctions between Southern and Northern Hemisphere iron/dust biogeochemistry that must be recognized by modelers and included in future simulations. Better information is required on the relative role of the atmosphere and ocean on influencing iron biogeochemistry and how their relative influences might change in the future due to climate change.
Details
- Title
- Biogeochemistry of iron in Australian dust: From eolian uplift to marine uptake
- Authors
- D S Mackie (Author) - University of Otago, New ZealandP W Boyd (Author) - University of Otago, New ZealandG H McTainsh (Author) - Griffith UniversityNeil W Tindale (Author) - University of the Sunshine Coast - Faculty of Science, Health and EducationT K Westberry (Author) - Oregon State University, United StatesK A Hunter (Author) - University of Otago, New Zealand
- Publication details
- G3: Geochemistry, Geophysics, Geosystems, Vol.9(3)
- Publisher
- American Geophysical Union
- Date published
- 2008
- DOI
- 10.1029/2007GC001813
- ISSN
- 1525-2027
- Copyright note
- Copyright © 2008 American Geophysical Union. The published version is reproduced here in accordance with the publisher's copyright policy.
- Organisation Unit
- School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99449900102621
- Output Type
- Journal article
Metrics
40 File views/ downloads
667 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Geochemistry & Geophysics
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites