Sorry, too busy yesterday to respond.
There are three major pacific ocean cycles at work here. The PDO (Pacific decadal Oscillation), the multi-decadal 30 year, and 60 year cycles. The year 2012 saw very weak salmon numbers in the northern Pacific, while Monterey bay had the best run since the 'late 40's.
Endless salmon limits all season long. A friend has a sportfishing charter business on Prince of Wales Island, the next island above the spot where the iron sulfate was dumped. The year 2013 was a salmon desert in the Monterey Bay (I landed five for the season), while the Prince of Wales/Queen Charolette Islands had huge numbers. So did the Eureka, California area. In other words, the fish have tails, and move around as their food source population ebbs and grows.
The iron sulfate did create a planktonic bloom that enhanced forage fish production in a very limited area near the dump site. The large return of Pink Salmon to the area (pinks being the most populous species in S.E. Alaska) has to do with the two year oceanic life cycle of these fish. Depending on geographic location, the Pink Salmon population peaks in either odd or even years. One year of weak runs followed by strong runs the next. The 72 million strong Fraser river sockeye return mentioned was the result of the previous year being the weakest in recent memory. Sockeye have a different life cycle than pinks, and there was a lot of larger than normal fish in that 72 mil run. Most folks in the know attribute this to the higher than normal water temperatures in the Fraser the previous year. An extra year of feeding at sea, and you have two years worth of fish returning the same year. I've witnessed this pattern of boom/bust in salmon populations my entire life, and the author's attempt to attribute the upshift in runs to the teeny tiny plankton bloom created by the Zubrin dump is either a product of ignorance or political spin.
What do you think Ray?http://www.nationalreview.com/article/376258/pacifics-salmon-are-back-thank-human-ingenuity-robert-zubrin