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Southern Ocean Iron May Have Come From The Depths, Not The Atmosphere, Researchers Conclude

Date:
December 20, 2001
Source:
American Geophysical Union
Summary:
Scientists believe that increases in plant life in the Southern Ocean are associated with increases in iron, which acts as a fertilizer, in the ocean water. This "Iron Hypothesis" was put forward a decade ago by the late John Martin. Iron is usually in short supply but, according to Martin, could have been delivered in greater amounts via dust falling into the ocean during intervals between glacial periods. Two researchers from Indiana University - Purdue University Indianapolis (IUPUI) now cast doubt on dust as the principal source of iron and propose an alternative source of iron in the Southern Ocean.

WASHINGTON - Scientists believe that increases in plant life in the Southern Ocean are associated with increases in iron, which acts as a fertilizer, in the ocean water. This "Iron Hypothesis" was put forward a decade ago by the late John Martin. Iron is usually in short supply but, according to Martin, could have been delivered in greater amounts via dust falling into the ocean during intervals between glacial periods. Two researchers from Indiana University - Purdue University Indianapolis (IUPUI) now cast doubt on dust as the principal source of iron and propose an alternative source of iron in the Southern Ocean.


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The above story is based on materials provided by American Geophysical Union. Note: Materials may be edited for content and length.


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American Geophysical Union. "Southern Ocean Iron May Have Come From The Depths, Not The Atmosphere, Researchers Conclude." ScienceDaily. ScienceDaily, 20 December 2001. <www.sciencedaily.com/releases/2001/12/011220081246.htm>.
American Geophysical Union. (2001, December 20). Southern Ocean Iron May Have Come From The Depths, Not The Atmosphere, Researchers Conclude. ScienceDaily. Retrieved April 16, 2014 from www.sciencedaily.com/releases/2001/12/011220081246.htm
American Geophysical Union. "Southern Ocean Iron May Have Come From The Depths, Not The Atmosphere, Researchers Conclude." ScienceDaily. www.sciencedaily.com/releases/2001/12/011220081246.htm (accessed April 16, 2014).

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