DIFFUSION AND SOLUBILITY OF HCL IN ICE - PRELIMINARY-RESULTS

The diffusion and solubility of HCl in ice have been measured between -5 and -15-degrees-C by exposing large single crystals of ice to low v apor pressures of HCl for several days. The solubility is found to be (1.0+/-0.15) x 10(-4) mol/l at -15-degrees-C under a 5.6x10(4) Pa HCl partial pressure. The diffusion coefficient is of the order of 10(-12) cm2s-1 at -8-degrees-C, but the determination of the value is affecte d by small angle boundaries, where HCl motion is much faster. Extrapol ation of these results suggests that HCl is not incorporated into stra tospheric ice crystals.