Southern Ocean Iron Enrichment

Cochlan, W. P., Herndon, J., Roberts, A. E., Kudela, R. M. (2002b). Inorganic and organic nitrogen utilization during the Southern Ocean Iron Enrichment Experiments (SOFeX). American Geophysical Union 2002 Fall Meeting, San Francisco, CA. Eos Trans. AGU. 

Cochlan, W. P., Herndon, J., Betts, J. N., Costello, D. R., Trick, C. G., Wells, M. L. (2005). Ammonium inhibition of nitrate uptake during mesoscale iron-enrichment experiments A comparison of the planktonic response during SOFeX and SEEDS II. SEEDS II Workshop Second Iron Enrichment Experiment in the western subarctic Pacific, Tokyo, Japan, October 2005 (Abstract). Cochlan, W. P., Kudela, R. M. (2006). The Southern Ocean iron enrichment experiment the nitrogen uptake response. In Report of the 2004 Workshop on In Situ Iron Enrichment Experiments in the Eastern and Western Subarctic Pacific (Takeda, S., and Wong, C. S., eds.), PISCES Scientific Report 31, pp. 27—31. 

NADPH Reduced form of nicotinamide-adenine dinucleotide phosphate SOIREE Southern Ocean Iron Enrichment Experiment... 

SOIREE Southern Ocean Iron Enrichment Experiment... 

Boye M, Nishioka J, Croot PL, Laan P, Timmermans KR, de Baar HJW (2005) Major deviations of iron complexation during 22 days of a mesoscale iron enrichment in the open Southern Ocean. Mar Chem 96 257-271... 

Olson RJ, Sosik HM, Chekalyuk AM, Shalapyonok A (2000) Effects of iron enrichment on phytoplankton in the Southern Ocean during late summer active fluorescence and flow cytometric analyses. Deep-Sea Res Part II 47 3179-3200... 

Figure 38.6 Effects of Fe enrichment on N03 drawdown in the South Patch (66.45° S, 171.8° W) during the SOFeX Southern Ocean mesoscale iron addition experiment. Shown are N03 concentrations versus time in the iron-fertilized patch (closed circles) compared to nearby unfertilized control waters (open circles). Coale et al. (2004), Science 304 408—414.

Boyd, P. W. (2002). The role of iron in the biogeochemistry of the Southern Ocean and equatorial Pacific A comparison of in situ iron enrichments. Deep Sea Res. 1149, 1803—1821. 

The one key critical point that all of the iron-enrichment experiments have failed to show is an increase in the export of carbon to the deep sea. Even the Southern Ocean experiments, where a CO2 drawdown occurred, did not result in an increase in export flux. Sediment traps set out at a depth of... 

Fig. 6.26 Chlorophyll concentrations as indicators of phytoplankton growth, inside and outside an iron-enriched patch of seawater in the Southern Ocean. After a few days chlorophyll concentrations had increased markedly in the iron-enriched water indicating phytoplankton growth. After Boyd et al. (2000), reprinted with permission from Nature. Copyright (2000) Macmillan Magazines Limited.

In remote regions of the open ocean that receive little atmospheric input, the vertical transport of iron-rich deep waters is particularly important [73,156]. The primary source of iron to the Fe-limited Southern Ocean is entrainment of Fe-enriched water during deep winter mixing, augmented by the summer upwelling of circumpolar deep water at the Polar Front and the southern front of the Antarctic Circumpolar Current [119,155,157]. 

SERIES Subarctic Ecosystem Response to Iron Enrichment Study SOFeX Southern Ocean Fe Experiment, including both North and South... 

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