Using observed data of snowfall processes at Maqin micro meteorological observation, Qinghai, the influence of snow cover on soil temperature, soil moisture, soil heat flux and surface energy exchange were discussed.The results show that shallow soil temperature is more sensitive to snow cover.Snow cover has no effect on deep soil temperature.Daily average of shallow soil temperature rises, daily range of shallow soil temperature decreases, daily minimum of shallow soil temperature rises and absolute value of shallow soil temperature gradient decreases while snow covered.Snow cover has no effect on soil moisture when soil is completely frozen.When soil is melting, daily range of shallow soil moisture decreases while snow covered and deep soil moisture is not influenced.Daily range of shallow soil heat flux decreases while snow covered.In sunny days with the same total radiation, because of high snow albedo while snow covered, upward shortwave radiation increases, net radiation decreases, sensible heat flux decreases, latent heat flux increases, H/Rn decreases and LE/Rn increases.
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