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. 2014 Mar 5;9(3):e90705. doi: 10.1371/journal.pone.0090705

Figure 1. UV Irradiance at Union Glacier Camp.

Figure 1

a) Ground-based measurements of the UV irradiance on 04.12.2012 (cloudless conditions). b) Spectra measured at noon on 11.12.2012 (cloudless conditions, SZA = 57°, red line) and at midnight on 12.12.2012 (cloudless conditions, SZA = 77°, blue line). Crosses stand for OMI readings at 305 nm, at 310 nm, at 324 nm and at 380 nm. c) Lines stand for UVI computed from ground-based spectral measurements on 04.12.2012 (green line), on 05.12.2012 (black line), on 06.12.2012 (blue line), on 11.12.2012 (orange line), on 12.12.12 (yellow line), on 13.12.2012 (red line). Crosses stand for OMI estimates of UVI.