Hawkings et al. The effect of warming climate on nutrient and solute export from the Greenland Ice Sheet Figure S-4 Comparison of regression plots for the major ions for 2009, 2010 and 2012, where data are available. The differences in the regression equations used to determine major ion concentrations are very small. Figure S-4 Comparison of regression plots for the major ions for 2009, 2010 and 2012, where data are available. The differences in the regression equations used to determine major ion concentrations are very small. Hawkings et al. (2015) Geochem. Persp. Let. 1, 94-104 | doi: 10.7185/geochemlet.1510 © 2015 European Association of Geochemistry