4NC Figure 1: Human emissions have caused a strong rise in greenhouse gases concentrations over the past 100 years
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Note: In all graphs, symbols reference different data sets. The top figure reports variations in atmospheric CO2 concentrations in Antartic ice cores. The middle and bottom figures report the change in CH4 and N2O abundance, respectively, determined from ice cores, firn and whole air samples.
Source: Adapted from Intergovernmental Panel on Climate Change, 2001
Text description of figure
These 3 graphs demonstrates that human emissions have caused a strong rise in greenhouse gases concentrations over the past 100 years. The top figure reports variations in atmospheric CO2 concentrations in Antarctic ice cores. The middle and bottom figures report the change in CH4 and N2O abundance, respectively, determined from ice cores, firn, and whole air samples.
