[LINK] "Iron-fertilizing experiment took place in worst possible spot: scientists"

[rfmcdonald]

More on the attempted geoengineering that occurred off the British Columbia coast earlier this year. Zoe McKnight's Vancouver Sun article observes that, in terms of location alone, if you want to alter the global climate by dumping large amounts of iron dust in the ocean, a location off the Haida Gwaii islands is one of the worse places to do it, or at least one of the worse places to find proof that the dumping actually worked.

[O]ver the summer, 100 tonnes of iron sulphate and 20 tonnes of iron oxide were scattered 370 kilometres off the coast of Haida Gwaii, right in the path of the Haida eddies, during the first and only project undertaken by the Haida Salmon Restoration Corp. The $2.5-million exercise was a purported attempt to measure how the iron — which is water-soluble — added to the ocean could enhance declining salmon stocks.

The Haida eddies, clockwise-rotating areas of water up to 300 kilometres in diameter, are known to carry iron-rich coastal water out to sea, where there is less iron and therefore less ocean life. The eddies form off the southern tip of the island and become highly concentrated with phytoplankton and chlorophyll, which is readily visible as a “bloom” from satellites as they travel through the northeast Pacific.

The iron fertilization project garnered worldwide attention and criticism from the scientific community. Scientists from around the world have studied the ocean currents near the archipelago, and many expressed concern over the environmental effects on what is considered pristine water.

But experts also say adding iron to this particular ocean region would obscure any data collected by the salmon restoration company because it would be impossible to tell if any growth in fish food — plankton — was a result of added iron or the eddies.

“If you were going to plan to do an experiment to demonstrate the impact of iron fertilization, you wouldn’t dump it into a Haida eddy, I don’t think,” said Jay Cullen, an ocean scientist who runs a lab at the University of Victoria that studies chemicals and trace metals in marine environments.

“If a group were to fertilize such a feature with iron, it would be next to impossible to determine how productivity and phytoplankton biomass was influenced by the treatment,” he said, calling it “bad scientific design.”

A well-designed experiment would include a way to distinguish between water with iron added and water without, to isolate the impact of adding the iron by using a control water sample. Outside the eddies, iron concentration offshore is low because its source is land and the northeast Pacific is anemic compared to coastal water.