Subnivean Level 3 Data Retrieval

Level 3 data are segments of the dataset that have undergone rigorous analysis by one of the project scientists for publication purposes. The content, level of manipulation, etc. of Level 3 data varies considerably according to the objectives of a particular analysis. Therefore, these data segments are provided as finished "packages", and you get whatever they contain. The Level 3 data typically come with a reference to relevant publications concerning the interpretation of the data.

The following files contain data from the first two years of operation of the Subnivean laboratory on Niwot Ridge, in the Colorado Front Range. The 1994 dataset is the subject of the paper:

Cline, D., Snow surface energy exchanges and snowmelt at a continental, midlatitude alpine site, Water Resources Research, 1997 (accepted).
Both the 1994 and the 1995 datasets are the subject of the paper:

Cline, D., Effect of seasonality of snow accumulation and melt on snow surface energy exchanges at a continental alpine site, Journal of Applied Meteorology, Volume 36, No. 1, pp. 22-41, 1997.

The hourly met/melt data for 1994 and 1995 are contained in the files SUB94H.txt and SUB95H.txt. Both files are comma delimited with an empty field denoting a missing value. The headers for both files are:
1. Decimal Time
2. Incident Solar Radiation (W/m2)
3. Reflected Solar Radiation (W/m2)
4. Incident Longwave Radiation (W/m2)
5. Upwelling Longwave Radiation (W/m2)
6. Net Radiation (W/m2)
7. Albedo (%)
8. Barometric Pressure (mb)
9. Air Temperature, 0.5 m Height (C)
10. Air Temperature, 1.0 m Height (C)
11. Air Temperature, 2.0 m Height (C)
12. Relative Humidity, 0.5 m Height (%)
13. Relative Humidity, 1.0 m Height (%)
14. Relative Humidity, 2.0 m Height (%)
15. Wind Speed, 0.5 m Height (m/s)
16. Wind Speed, 1.0 m Height (m/s)
17. Wind Speed, 2.0 m Height (m/s)
18. Sensible Heat Flux, average of three height profiles (W/m2)
19. Latent Heat Flux, average of three height profiles (W/m2)
20. Ground Heat Flux, 0.05 m depth (W/m2)
21. Residual Energy Term (delta Qs + delta Qm), (W/m2)
22. Measured Lysimeter Flow (mm/hr)

The files precip94.txt and precip95.txt contain relevant precipitation data.
The files profil94.txt and profil95.txt contain snowpit data from peak accumulation of each year.
Additional information concerning the study site, other data resources from the site, etc. is available from the Niwot Ridge LTER Home Page.
Contact Person:
Don Cline
clined@whitney.colorado.edu

Return to Niwot Ridge Subnivean Data Retrieval System Home Page

If any problems arise please e-mail
Todd Ackerman (todda@culter.colorado.edu)