To weigh in on the ‘iron hypothesis’ in the North Greenland Eemian Ice Drilling (NEEM) ice core, Cunde Xiao and his colleagues firstly reconstructed the bioavailable Fe data in this deep ice core from the northern Hemisphere over the past 110 kyr B.P., which suggested that the dissolved Fe (DFe) records in NEEM ice core were significantly anti-correlated with the carbon oxide (CO2) concentrations during the cold periods. The pattern of Fe concentration was extremely similar to that of the number of dust particles. The results also emphasized that the changes of the Fe fertilization effect could not be explained by a simple linear relationship with the glacial-interglacial changes in the CO2 concentration in the atmosphere.
Click here for original story, Iron in the Greenland ice core relative to Asian loess records over the past 110,000 years
Source: Phys.org