期刊
GEOPHYSICAL RESEARCH LETTERS
卷 42, 期 6, 页码 1912-1918出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL063419
关键词
dust emissions; Antarctica; soluble iron; climate change; McMurdo Dry Valleys
资金
- National Science Foundation [ANT-0739496]
- NSF [IIA-1427642, EAR 1147545]
- USDA [2014-51130-22492]
- Directorate For Geosciences [1148334] Funding Source: National Science Foundation
- Directorate For Geosciences
- Division Of Earth Sciences [1147545] Funding Source: National Science Foundation
- Division Of Earth Sciences [1148334] Funding Source: National Science Foundation
The soluble iron content and dust emission potential of sediment samples collected from the Taylor Valley in the McMurdo Dry Valleys (MDVs) and sea ice in the McMurdo Sound were evaluated to determine whether inputs to the Southern Ocean may be sufficient to affect ocean productivity. Our results show that the dust-generating potential from the MDVs soils are comparable to those of sediments from other major dust sources in the Southern Hemisphere. Sediments from the MDVs and sea ice are one order of magnitude richer in soluble iron than those in other dust sources in the Southern Hemisphere. Forward trajectory analyses show that the dust from the MDVs is likely to be deposited in the Southern Ocean. These results provide evidence of the possible supply of soluble iron to the Southern Ocean associated with dust transport from the MDVs, should climate change expand the exposed areas of the continent.
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