Abstract
A new core sampler was developed. Its sampler pipes are made of acrylic acid resin to be convenient to examine the stratification of a core. A fur of seal is pasted inside the sampler cutter in order to prevent the loss of sample when the sampler is pulled up. The sampler joint was also deviced to be suitable for jointing the sampler pipes.
The sampler was used for the measurement of water equivalence of snow covers and for stratigraphic observations within them. All devices were successful. It was observed that the amount of contraction of a core depended on snow form and sampling procedure, and the value of the ratio of the snow depth to the core length varied from 1. 04 to 1. 35. In order to reproduce the stratification within a snow cover from that in a core, it is suggested that the height of an interface within the snow cover is, as an approximation, estimated from multiplying that of the corresponding interface by the value of the ratio of the snow depth to the core length. It is shown that the error of this estimated height is less than 8. 4% of the snow depth. A method for the improvement on this error is suggested. The new devices for the sampler are applicable to core samplers used for other deposits as well as snow cover.
