Illegal Iron Dumping Spawns Huge Algal Bloom Seen from Space

A phytoplankton bloom in the North Atlantic. This is not an image of the bloom reportedly spawned by iron dumping in the Pacific Ocean. (Image credit: Terra – MODIS / NASA Earth Observatory)

In what is being hailed and demonized as the world's largest geoengineering experiment, a businessman has reportedly dumped a massive amount of iron sulfate into the Pacific Ocean, according to an investigation of satellite images by The Guardian.

"The dump was part of a $2 million bid to drive a surge in salmon populations and is currently under investigation by Environment Canada's enforcement branch," according to Smithsonian.com.

Geoengineering, or the intentional manipulation of the planet to combat global warming, is at the very least controversial. Ideas have ranged from sucking the greenhouse gas carbon dioxide from the air and burying it deep in the deep ocean to building a space-based sunshade to block radiation from warming the planet.

The current unauthorized experiment is in ocean fertilization, which entails providing iron to the teensy marine plants and photosynthetic microbes in the ocean. Just as fertilizing crops on land can spur growth, adding the necessary nutrient of iron to the ocean can cause plankton blooms.

As the phytoplankton grow, the idea goes, they would also take in carbon dioxide and then sink to the bottom of the ocean, sequestering the gas far from the atmosphere. Many scientists and others have warned that these schemes could have unintended environmental side effects, let alone acting as a sort of band-aid for man-made climate change.

Besides the debate over its usefulness and safety among the scientific community, ocean fertilization on this scale violates two international moratoria, according to The Guardian article.

According to The Guardian, George is the former chief executive of Planktos, Inc., known for its previous failed efforts to dump such plankton "food" near the Galapagos and Canary Islands. Since then, The Guardian reports, the Spanish and Ecuadorian governments have barred his vessels from their ports, while the U.S. Environmental Protection Agency warned him that flying a U.S. flag for the Galapagos experiment would violate U.S. laws.

Jeanna Bryner is managing editor of Scientific American. Previously she was editor in chief of Live Science and, prior to that, an editor at Scholastic's Science World magazine. Bryner has an English degree from Salisbury University, a master's degree in biogeochemistry and environmental sciences from the University of Maryland and a graduate science journalism degree from New York University. She has worked as a biologist in Florida, where she monitored wetlands and did field surveys for endangered species, including the gorgeous Florida Scrub Jay. She also received an ocean sciences journalism fellowship from the Woods Hole Oceanographic Institution. She is a firm believer that science is for everyone and that just about everything can be viewed through the lens of science.