Figure 2
From: A 50-year record of NOx and SO2 sources in precipitation in the Northern Rocky Mountains, USA
Plot of reported volcanic events and isotopic age dates used to generate a polynomial fit for an age-depth profile of the Upper Fremont Glacier ice core collected in 1991 [26], Wind River Range, Wyoming. A slightly modified age-depth profile was developed for the 1998 ice core (DH-98-4) to account for the additional snow deposited between 1991 and 1998.