Da. Braaten, A NEW TECHNIQUE TO PROVIDE HIGH TIME RESOLUTION SNOWPACK DATING FOR STRATIGRAPHY AND CHEMISTRY, Atmospheric environment, 29(18), 1995, pp. 2535-2539
A new technique has been developed to provide quantitative, high tempo
ral resolution information of snow accumulation dynamics in remote pol
ar, alpine, and high-latitude environments which can be used to identi
fy episodic mechanical forcings and chemical inputs to a snowpack. Thi
s technique uses a device which disperses inert, colored (high albedo)
glass microspheres onto a snow surface at known time intervals to act
as a tracer and time marker. Dating individual layers of the snowpack
is obtained by using a sequence of several microsphere colors. The ti
me interval between microsphere dispersal can range from hours for inv
estigations of individual storms, to months for investigations in pola
r regions with small snow accumulations. The resulting spatial distrib
ution of microspheres in the snowpack is determined by either core sam
pling or snow pit sampling, and extracting the microspheres from the s
now melt samples for optical analyses. A field test of this technique
was successfully conducted at an alpine site and the results of this t
est along with a chemical analysis of the snow profile are provided.