For any noticable effects on temperature it is way too small. Similar experiments have been conducted by Scientists near Antarctica in the past (including inter

For any noticable effects on temperature it is way too small. Similar experiments have been conducted by Scientists near Antarctica in the past (including international protest after it became known), resulting in big algae patches visible on satellite images (see the slides in [1] for examples). [1] I'm referring to the slides here: http://www.iup.uni-heidelberg.de/institut/studium/lehre/lehre/Climate_Engineering/11_CE_SS-2012_Climate%20Engineering_Ocean_Fertilization.pdf http://www.iup.uni-heidelberg.de/institut/studium/lehre/lehr...