IronEx I

IronEx I

An experiment taking place in October 1993 that marked the first attempt to experimentally manipulate an ocean ecosystem. A single pulse of iron was added to a 64 square kilometer patch of water in the eastern equatorial Pacific HNLC zone. The fertilized patch was tracked using a Chl fluorescence and a sulfur-hexafluoride (SF6) inert tracer. After 2 to 3 days researchers measured a doubling of phytoplankton biomass, a tripling of Chl, and a fourfold increase in net primary productivity (NPP), with no measureable drawdown of either NO3 or CO2.

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Industry/Domain: Earth science
Category: Physical oceanography
Company: Texas A&M University
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dracula fish

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