A Technique for Measuring Microparticles in Polar Ice Using Micro-Raman Spectroscopy
Figure 3
The plotted intensities are Raman peaks from the S–O symmetric stretching mode of a mirabilite microparticle found in the Dome Fuji ice core, for several cross slit widths. The left-hand plot (a) shows the peak intensities as a function of slit width. The series “Raman spectra of ice and microparticles” is derived from the raw spectral data. “Baseline of ice” is an average of 60 spectra taken from points on the ice without any microparticles. This spectrum is subtracted from the raw spectra of the S–O symmetric stretching mode to obtain the “Microparticle” spectrum. The right-hand plot (b) shows the raw data of each spectra.
