Observed and corrected precipitation at Ny-Alesund

This file contains precipitation data for Ny-Alesund from 01/01/1975 to 31/12/2022.
It contains observed data downloaded from the database of the Norwegian Meteorological Institute accesible
via https://seklima.met.no/ (last accessed on 20/12/2023).
The corrected data correspond to the data described in O. Champagne et al., Artificial Trends or Real
Changes? Investigating Precipitation Records in Ny-Ålesund, Svalbard, submitted to Journal of
Hydrometeorology, 2023. It includes precipitation separated in rain and snow corrected using 11 different methods
as well as the ensemble mean, all described in the manuscript.

The columns represent the following data:
1. Date+time [UTC]: Date and time in UTC (dd/mm/yyyy hh:mm:ss) of the collection of the precipitation, i.e. the
indicated precipitation values correspond to the precipitation collected in the following 12h period
2. Observed rain: observed liquid precipitation in mm, derived from observed total precipitation as a function of
temperature and solid to total precipiation ratios as described in Champagne et al.
3. Forland Ny Alesund rain: corrected liquid precipitation in mm according to Hanssen-Bauer, I., et al., 1996: Measured
and true precipitations at Svalbard, DNMI Report Nr. 31/96, Norwegian Meteorological Institute, Oslo, Norway.
4. Forland Norwegian rain: corrected liquid precipitation in mm according to Forland, E. J., et al., 1996:
Manual for operational correction of Nordic precipitation data, DNMI Report Nr. 24/96, Norwegian
Meteorological Institute, Oslo, Norway.
5. Adam rain: corrected liquid precipitation in mm according to Adam, J. C., and D. P. Lettenmaier, 2003: Adjustment of
global gridded precipitation for systematic bias: GLOBAL GRIDDED PRECIPITATION. J. Geophys. Res., 108,
https://doi.org/10.1029/2002JD002499 (unchanged compared to observed precipitation).
6. Wolff wind 2m rain: corrected liquid precipitation in mm according to Wolff, M. A., et al., 2015: Derivation of a new
continuous adjustment function for correcting wind induced loss of solid precipitation: results of a Norwegian
field study. Hydrol. Earth Syst. Sci., 19, 951–967, https://doi.org/10.5194/hess-19-951-2015.
7. Wolff wind 10m rain: corrected liquid precipitation in mm according to Wolff, M. A., et al., 2015: Derivation of a new
continuous adjustment function for correcting wind induced loss of solid precipitation: results of a Norwegian
field study. Hydrol. Earth Syst. Sci., 19, 951–967, https://doi.org/10.5194/hess-19-951-2015.
8. Kochendorfer wind 2m rain: corrected liquid precipitation in mm according to Kochendorfer, J., et al., 2017:
Analysis of single-Alter-shielded and unshielded measurements of mixed and solid precipitation from
WMO-SPICE. Hydrol. Earth Syst. Sci., 21, 3525–3542, https://doi.org/10.5194/hess-21-3525-2017.
9. Kochendorfer wind 10m rain: corrected liquid precipitation in mm according to Kochendorfer, J., et al., 2017:
Analysis of single-Alter-shielded and unshielded measurements of mixed and solid precipitation from
WMO-SPICE. Hydrol. Earth Syst. Sci., 21, 3525–3542, https://doi.org/10.5194/hess-21-3525-2017.
10. Kochendorfer bis wind 2m rain: corrected liquid precipitation in mm according to Kochendorfer, J., et al., 2017:
Analysis of single-Alter-shielded and unshielded measurements of mixed and solid precipitation from
WMO-SPICE. Hydrol. Earth Syst. Sci., 21, 3525–3542, https://doi.org/10.5194/hess-21-3525-2017 (unchanged
compared to observed precipitation).
11. Kochendorfer bis wind 10m rain: corrected liquid precipitation in mm according to Kochendorfer, J., et al., 2017:
Analysis of single-Alter-shielded and unshielded measurements of mixed and solid precipitation from
WMO-SPICE. Hydrol. Earth Syst. Sci., 21, 3525–3542, https://doi.org/10.5194/hess-21-3525-2017 (unchanged
compared to observed precipitation).
12. Ensemble mean rain: Average of all corrected liquid precipitation in mm.
13. Observed snow: observed solid precipitation in mm, derived from observed total precipitation as a function of
temperature and solid to total precipiation ratios as described in Champagne et al.
14. Forland Ny Alesund snow: corrected solid precipitation in mm according to Hanssen-Bauer, I., et al., 1996: Measured
and true precipitations at Svalbard, DNMI Report Nr. 31/96, Norwegian Meteorological Institute, Oslo, Norway.
15. Forland Norwegian snow: corrected solid precipitation in mm according to Forland, E. J., et al., 1996:
Manual for operational correction of Nordic precipitation data, DNMI Report Nr. 24/96, Norwegian
Meteorological Institute, Oslo, Norway.
16. Adam snow: corrected solid precipitation in mm according to Adam, J. C., and D. P. Lettenmaier, 2003: Adjustment of
global gridded precipitation for systematic bias: GLOBAL GRIDDED PRECIPITATION. J. Geophys. Res., 108,
https://doi.org/10.1029/2002JD002499.
17. Wolff wind 2m snow: corrected solid precipitation in mm according to Wolff, M. A., et al., 2015: Derivation of a new
continuous adjustment function for correcting wind induced loss of solid precipitation: results of a Norwegian
field study. Hydrol. Earth Syst. Sci., 19, 951–967, https://doi.org/10.5194/hess-19-951-2015.
18. Wolff wind 10m snow: corrected solid precipitation in mm according to Wolff, M. A., et al., 2015: Derivation of a new
continuous adjustment function for correcting wind induced loss of solid precipitation: results of a Norwegian
field study. Hydrol. Earth Syst. Sci., 19, 951–967, https://doi.org/10.5194/hess-19-951-2015.
19. Kochendorfer wind 2m snow: corrected solid precipitation in mm according to Kochendorfer, J., et al., 2017:
Analysis of single-Alter-shielded and unshielded measurements of mixed and solid precipitation from
WMO-SPICE. Hydrol. Earth Syst. Sci., 21, 3525–3542, https://doi.org/10.5194/hess-21-3525-2017.
20. Kochendorfer wind 10m snow: corrected solid precipitation in mm according to Kochendorfer, J., et al., 2017:
Analysis of single-Alter-shielded and unshielded measurements of mixed and solid precipitation from
WMO-SPICE. Hydrol. Earth Syst. Sci., 21, 3525–3542, https://doi.org/10.5194/hess-21-3525-2017.
21. Kochendorfer bis wind 2m snow: corrected solid precipitation in mm according to Kochendorfer, J., et al., 2017:
Analysis of single-Alter-shielded and unshielded measurements of mixed and solid precipitation from
WMO-SPICE. Hydrol. Earth Syst. Sci., 21, 3525–3542, https://doi.org/10.5194/hess-21-3525-2017.
22. Kochendorfer bis wind 10m snow: corrected solid precipitation in mm according to Kochendorfer, J., et al., 2017:
Analysis of single-Alter-shielded and unshielded measurements of mixed and solid precipitation from
WMO-SPICE. Hydrol. Earth Syst. Sci., 21, 3525–3542, https://doi.org/10.5194/hess-21-3525-2017.
23. Ensemble mean snow: Average of all corrected solid precipitation in mm.