snowpack

Starting-from-profiles

Attention! This page is marked as deprecated, use it as reference only if you are sure you need these specific information.

Table of Content

Creating a sno file from field snow profiles

Warning: This has been deprecated since it is now possible to create profiles in niViz, save as caaml6 and start Snowpack on the caaml file.

So this page is only here for historical purposes, please do not use it nor request support on thsi!

Introduction

With the upcoming CAAML profiles, there will be a much easier way of doing this. What is laid out below is for creating sno or smet profiles.

Converting the measured parameters

You need the following information:

  • properly identify the layers in the density profile and match them to the grain type profile
  • compute the volume fractions θ from the density profile (with θi = ρ / 917);
  • evaluate dd and sp with the help of the grain classification scheme;
  • evaluate rg and rb from the table below;
  • evaluate/interpolate each layer's temperature;
  • evaluate the date when each layer was created (through the help of threads, automatic snow height measurements, etc);
  • when using snow harps, distribute them to the proper layers and attribute to each harp a 1cm thick element

Grains properties table:

type rg [mm] rb [mm] rb/rg diameter [mm]
+ 0.3 / 0.15 0.075 / 0.04 0.25 1 - 3
/ 0.3 / 0.15 0.075 / 0.04 0.25 1 - 2
0.2 / 0.28 0.06-0.12 / 0.14 0.3-0.6 0.2 - 0.5
0.8 / 0.6 0.32 / 0.24 0.4 0.5 - 3
2.5 / 0.8 1-1.25 / 0.34 0.4-0.5 2 - 5
0.8 / 0.9 0.48-0.6 / 0.4 0.6-0.75 0.5 - 3
5 / 2.05 1.5-2.5 / 0.7 0.3-0.5 1 - 10

Created: 2 years 9 months ago
by Mathias Bavay

Updated: 2 months 18 days ago
by Mathias Bavay

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Other:Deprecated

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