Drill core evidence adds credence to iron fertilization hypothesis regarding last ice age
Friday, March 21, 2014 - 09:50
in Earth & Climate
(Phys.org) —An international team of researchers has found evidence in drill core samples taken near Antarctica that adds credence to the iron fertilization hypothesis. In their paper published in the journal Science, the team describes how lowered nitrogen levels found in core samples helps bolster the idea that increased iron in the oceans during the last ice age caused a decrease in atmospheric carbon dioxide levels.