In the video above, Ethan explains how the scanning lidars work, while Jessica looks at the lidar equipment. In the video linked here Ethan takes the lidar away from Jessica and explains how it works more succinctly. You can vote which one you think is more useful for inclusion in the final class website.
To learn more about the basic atmospheric dynamics of wind
To learn more about mountain scale winds and how they impact snow accumulation at a watershed scale
To learn more about blowing snow and snow on the ground, check out
Download the lab and data files to your computer. Then, upload them to your JupyterHub following the instructions here.
In Lab 2 and Module 2, we saw that in late December, one of the four snow pillows had a sudden increase in snow water equivalent while the other three had a decrease. In Lab 3, we saw a similar pattern in the snow depth measurements near of the snow pillows. Look at the snow depths, the snow densities, wind speeds, and snow particle fluxes during this period. Create plots to help explain what is happening here. Referencing your plots, explain what happened in Kettle Ponds during this period. You may also want to check out the weekly weather blog.
There is a threshold wind speed that must be exceeded for snow transport. Li and Pomeroy 1997 state that 10-m wind speeds must exceed about 7.7 m/s for dry snow transport and about 9.9 m/s for wet snow transport. Use the 10-m wind speed measurements and particle counters to test if these thresholds match the observations at Kettle Ponds. If you have time, further discuss the questions at the end of Lab 4-2.
Please give a brief update of where you are with your project. Let me know if you have any questions or concerns at this point.