Environment - Ocean iron fertilization - Moving forward in a sea of uncertainty

Buesseler, Ken O.; Doney, Scott C.; Karl, David M.; Boyd, Philip W.; Caldeira, Ken; Chai, Fei; Coale, Kenneth H.; de Baar, Hein J. W.; Falkowski, Paul G.; Johnson, Kenneth S.; Lampitt, Richard S.; Michaels, Anthony F.; Naqvi, S. W. A.; Smetacek, Victor; Takeda, Shigenobu; Watson, Andrew J.