redOrbit: Scientists in Germany and India said an experiment to determine whether depositing hundreds of tons of dissolved iron in the Southern Ocean can diminish global warming has produced disappointing results. In conducting the research, scientists “fertilized” a 115 square mile area of ocean by placing six tons of dissolved iron inside the core of an eddy — a large, rotating column of water. The researchers hoped the iron would stimulate the growth of tiny planktonic algae known as …