Tom Alena Seth Bonnett Cindy Brisson Dave Cox Ken Huff Nate Poore Kathy Rossman Jerry Roth Valerie L. Thomas
Snow Pit:
After data collection was completed on the ice, each group dug a snow pit at the southern edge of the lake. Information was gathered from the snow pit using proper protocols. First, placing a meter stick at the base of the excavation and measuring to the top of the snow surface determined thickness for the snow pit. Once this was done, the layers of the snow pack were determined. This was accomplished by running one’s finger down the snow pack until resistance was encountered. Golf tees were placed at each layer interface. Next, the temperature gradient was determined by placing thermometers in each layer of the snow pack. All of this data was recorded. Density was determined using density tubes, whose empty mass was measured using a scale. The tubes were inserted in each layer of the snow pack, then removed and re-massed on the balance. The density was calculated using the difference in mass and the calculated volume of the cylinders. Lastly, the grain size and shape of the snow crystal in each layer was determined by closely examining the crystals through an 8x magnification loop.
SNOWPIT at CAMP SITE
February 18, 2002 at 3:07pm
GPS MEASUREMENT Lat. - 44°17'28"N
Long. - 73°58'13" W
ELEVATION Not determined
SNOWPIT DEPTH 71.1cm
DATA: DENSITY-TEMPERATURE PROFILE
Snow Layer (#) Tube (#) Weight Empty (g) Weight w/snow (g) Snow Mass (g) Snow Density (g/cm3) Thermometer (#) Non - Corrected Temp (°C) Thermometer Adjustmant (°C) Corrected Temp (°C)
1 49 406 500 94 0.19 6 -0.2 +2 1.8
2 B 304 426 122 0.24 3 0.0 0 0.0
3 20 304 440 136 0.27 4 -0.1 0 -0.1
4 16 300 454 154 0.31 7 -0.3 +2 1.7
5 K 302 446 144 0.29 9 -0.3 +1 0.7
6 1 306 470 164 0.33 7 -2.5 +2 -0.5
7 2 164 340 176 0.35
8 4 164 350 186 0.37
Snowpit Statigraphy
Depth (cm) Layer (#) Crystal Type
64 8 conglomeration of rounded crystals
54 7 granulated crystals
47 6 granular, ranging insize
37 5 cubic crystals, slightly flat
29 4 cubic/rectangular crystals
21 3 slightly flat crystals
15 2 very fused, large crystals
0 1 flat crystals
Conclusions from Snow Pit at Campsite:
Our observations from the campsite snow pit confirm our hypotheses from the cascade lake snow pit.
SNOWPIT ONE / SNOWPIT TWO